- Linux-stable-mirror - lists.linaro.org

[Linux-stable-mirror] FAILED: patch "[PATCH] target: Avoid early CMD_T_PRE_EXECUTE failures during" failed to apply to 4.9-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.9-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 1c21a48055a67ceb693e9c2587824a8de60a217c Mon Sep 17 00:00:00 2001 From: Nicholas Bellinger <nab(a)linux-iscsi.org> Date: Fri, 27 Oct 2017 22:19:26 -0800 Subject: [PATCH] target: Avoid early CMD_T_PRE_EXECUTE failures during ABORT_TASK This patch fixes bug where early se_cmd exceptions that occur before backend execution can result in use-after-free if/when a subsequent ABORT_TASK occurs for the same tag. Since an early se_cmd exception will have had se_cmd added to se_session->sess_cmd_list via target_get_sess_cmd(), it will not have CMD_T_COMPLETE set by the usual target_complete_cmd() backend completion path. This causes a subsequent ABORT_TASK + __target_check_io_state() to signal ABORT_TASK should proceed. As core_tmr_abort_task() executes, it will bring the outstanding se_cmd->cmd_kref count down to zero releasing se_cmd, after se_cmd has already been queued with error status into fabric driver response path code. To address this bug, introduce a CMD_T_PRE_EXECUTE bit that is set at target_get_sess_cmd() time, and cleared immediately before backend driver dispatch in target_execute_cmd() once CMD_T_ACTIVE is set. Then, check CMD_T_PRE_EXECUTE within __target_check_io_state() to determine when an early exception has occured, and avoid aborting this se_cmd since it will have already been queued into fabric driver response path code. Reported-by: Donald White <dew(a)datera.io> Cc: Donald White <dew(a)datera.io> Cc: Mike Christie <mchristi(a)redhat.com> Cc: Hannes Reinecke <hare(a)suse.com> Cc: stable(a)vger.kernel.org # 3.14+ Signed-off-by: Nicholas Bellinger <nab(a)linux-iscsi.org> diff --git a/drivers/target/target_core_tmr.c b/drivers/target/target_core_tmr.c index 61909b23e959..9c7bc1ca341a 100644 --- a/drivers/target/target_core_tmr.c +++ b/drivers/target/target_core_tmr.c @@ -133,6 +133,15 @@ static bool __target_check_io_state(struct se_cmd *se_cmd, spin_unlock(&se_cmd->t_state_lock); return false; } + if (se_cmd->transport_state & CMD_T_PRE_EXECUTE) { + if (se_cmd->scsi_status) { + pr_debug("Attempted to abort io tag: %llu early failure" + " status: 0x%02x\n", se_cmd->tag, + se_cmd->scsi_status); + spin_unlock(&se_cmd->t_state_lock); + return false; + } + } if (sess->sess_tearing_down || se_cmd->cmd_wait_set) { pr_debug("Attempted to abort io tag: %llu already shutdown," " skipping\n", se_cmd->tag); diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c index 0e89db84b200..58caacd54a3b 100644 --- a/drivers/target/target_core_transport.c +++ b/drivers/target/target_core_transport.c @@ -1975,6 +1975,7 @@ void target_execute_cmd(struct se_cmd *cmd) } cmd->t_state = TRANSPORT_PROCESSING; + cmd->transport_state &= ~CMD_T_PRE_EXECUTE; cmd->transport_state |= CMD_T_ACTIVE | CMD_T_SENT; spin_unlock_irq(&cmd->t_state_lock); @@ -2667,6 +2668,7 @@ int target_get_sess_cmd(struct se_cmd *se_cmd, bool ack_kref) ret = -ESHUTDOWN; goto out; } + se_cmd->transport_state |= CMD_T_PRE_EXECUTE; list_add_tail(&se_cmd->se_cmd_list, &se_sess->sess_cmd_list); out: spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h index d3139a95ea77..ccf501b8359c 100644 --- a/include/target/target_core_base.h +++ b/include/target/target_core_base.h @@ -490,6 +490,7 @@ struct se_cmd { #define CMD_T_STOP (1 << 5) #define CMD_T_TAS (1 << 10) #define CMD_T_FABRIC_STOP (1 << 11) +#define CMD_T_PRE_EXECUTE (1 << 12) spinlock_t t_state_lock; struct kref cmd_kref; struct completion t_transport_stop_comp;

7 years, 9 months

1
0
0 0

[Linux-stable-mirror] FAILED: patch "[PATCH] iscsi-target: Make TASK_REASSIGN use proper se_cmd->cmd_kref" failed to apply to 3.18-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 3.18-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From ae072726f6109bb1c94841d6fb3a82dde298ea85 Mon Sep 17 00:00:00 2001 From: Nicholas Bellinger <nab(a)linux-iscsi.org> Date: Fri, 27 Oct 2017 12:32:59 -0700 Subject: [PATCH] iscsi-target: Make TASK_REASSIGN use proper se_cmd->cmd_kref Since commit 59b6986dbf fixed a potential NULL pointer dereference by allocating a se_tmr_req for ISCSI_TM_FUNC_TASK_REASSIGN, the se_tmr_req is currently leaked by iscsit_free_cmd() because no iscsi_cmd->se_cmd.se_tfo was associated. To address this, treat ISCSI_TM_FUNC_TASK_REASSIGN like any other TMR and call transport_init_se_cmd() + target_get_sess_cmd() to setup iscsi_cmd->se_cmd.se_tfo with se_cmd->cmd_kref of 2. This will ensure normal release operation once se_cmd->cmd_kref reaches zero and target_release_cmd_kref() is invoked, se_tmr_req will be released via existing target_free_cmd_mem() and core_tmr_release_req() code. Reported-by: Donald White <dew(a)datera.io> Cc: Donald White <dew(a)datera.io> Cc: Mike Christie <mchristi(a)redhat.com> Cc: Hannes Reinecke <hare(a)suse.com> Cc: stable(a)vger.kernel.org # 3.10+ Signed-off-by: Nicholas Bellinger <nab(a)linux-iscsi.org> diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c index 541f66a875fc..048d4227327c 100644 --- a/drivers/target/iscsi/iscsi_target.c +++ b/drivers/target/iscsi/iscsi_target.c @@ -1955,7 +1955,6 @@ iscsit_handle_task_mgt_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, struct iscsi_tmr_req *tmr_req; struct iscsi_tm *hdr; int out_of_order_cmdsn = 0, ret; - bool sess_ref = false; u8 function, tcm_function = TMR_UNKNOWN; hdr = (struct iscsi_tm *) buf; @@ -1988,22 +1987,23 @@ iscsit_handle_task_mgt_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, cmd->data_direction = DMA_NONE; cmd->tmr_req = kzalloc(sizeof(*cmd->tmr_req), GFP_KERNEL); - if (!cmd->tmr_req) + if (!cmd->tmr_req) { return iscsit_add_reject_cmd(cmd, ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); + } + + transport_init_se_cmd(&cmd->se_cmd, &iscsi_ops, + conn->sess->se_sess, 0, DMA_NONE, + TCM_SIMPLE_TAG, cmd->sense_buffer + 2); + + target_get_sess_cmd(&cmd->se_cmd, true); /* * TASK_REASSIGN for ERL=2 / connection stays inside of * LIO-Target $FABRIC_MOD */ if (function != ISCSI_TM_FUNC_TASK_REASSIGN) { - transport_init_se_cmd(&cmd->se_cmd, &iscsi_ops, - conn->sess->se_sess, 0, DMA_NONE, - TCM_SIMPLE_TAG, cmd->sense_buffer + 2); - - target_get_sess_cmd(&cmd->se_cmd, true); - sess_ref = true; tcm_function = iscsit_convert_tmf(function); if (tcm_function == TMR_UNKNOWN) { pr_err("Unknown iSCSI TMR Function:" @@ -2119,12 +2119,8 @@ iscsit_handle_task_mgt_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, * For connection recovery, this is also the default action for * TMR TASK_REASSIGN. */ - if (sess_ref) { - pr_debug("Handle TMR, using sess_ref=true check\n"); - target_put_sess_cmd(&cmd->se_cmd); - } - iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); + target_put_sess_cmd(&cmd->se_cmd); return 0; } EXPORT_SYMBOL(iscsit_handle_task_mgt_cmd);

7 years, 9 months

1
0
0 0

[Linux-stable-mirror] FAILED: patch "[PATCH] iscsi-target: Make TASK_REASSIGN use proper se_cmd->cmd_kref" failed to apply to 4.4-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From ae072726f6109bb1c94841d6fb3a82dde298ea85 Mon Sep 17 00:00:00 2001 From: Nicholas Bellinger <nab(a)linux-iscsi.org> Date: Fri, 27 Oct 2017 12:32:59 -0700 Subject: [PATCH] iscsi-target: Make TASK_REASSIGN use proper se_cmd->cmd_kref Since commit 59b6986dbf fixed a potential NULL pointer dereference by allocating a se_tmr_req for ISCSI_TM_FUNC_TASK_REASSIGN, the se_tmr_req is currently leaked by iscsit_free_cmd() because no iscsi_cmd->se_cmd.se_tfo was associated. To address this, treat ISCSI_TM_FUNC_TASK_REASSIGN like any other TMR and call transport_init_se_cmd() + target_get_sess_cmd() to setup iscsi_cmd->se_cmd.se_tfo with se_cmd->cmd_kref of 2. This will ensure normal release operation once se_cmd->cmd_kref reaches zero and target_release_cmd_kref() is invoked, se_tmr_req will be released via existing target_free_cmd_mem() and core_tmr_release_req() code. Reported-by: Donald White <dew(a)datera.io> Cc: Donald White <dew(a)datera.io> Cc: Mike Christie <mchristi(a)redhat.com> Cc: Hannes Reinecke <hare(a)suse.com> Cc: stable(a)vger.kernel.org # 3.10+ Signed-off-by: Nicholas Bellinger <nab(a)linux-iscsi.org> diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c index 541f66a875fc..048d4227327c 100644 --- a/drivers/target/iscsi/iscsi_target.c +++ b/drivers/target/iscsi/iscsi_target.c @@ -1955,7 +1955,6 @@ iscsit_handle_task_mgt_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, struct iscsi_tmr_req *tmr_req; struct iscsi_tm *hdr; int out_of_order_cmdsn = 0, ret; - bool sess_ref = false; u8 function, tcm_function = TMR_UNKNOWN; hdr = (struct iscsi_tm *) buf; @@ -1988,22 +1987,23 @@ iscsit_handle_task_mgt_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, cmd->data_direction = DMA_NONE; cmd->tmr_req = kzalloc(sizeof(*cmd->tmr_req), GFP_KERNEL); - if (!cmd->tmr_req) + if (!cmd->tmr_req) { return iscsit_add_reject_cmd(cmd, ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); + } + + transport_init_se_cmd(&cmd->se_cmd, &iscsi_ops, + conn->sess->se_sess, 0, DMA_NONE, + TCM_SIMPLE_TAG, cmd->sense_buffer + 2); + + target_get_sess_cmd(&cmd->se_cmd, true); /* * TASK_REASSIGN for ERL=2 / connection stays inside of * LIO-Target $FABRIC_MOD */ if (function != ISCSI_TM_FUNC_TASK_REASSIGN) { - transport_init_se_cmd(&cmd->se_cmd, &iscsi_ops, - conn->sess->se_sess, 0, DMA_NONE, - TCM_SIMPLE_TAG, cmd->sense_buffer + 2); - - target_get_sess_cmd(&cmd->se_cmd, true); - sess_ref = true; tcm_function = iscsit_convert_tmf(function); if (tcm_function == TMR_UNKNOWN) { pr_err("Unknown iSCSI TMR Function:" @@ -2119,12 +2119,8 @@ iscsit_handle_task_mgt_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, * For connection recovery, this is also the default action for * TMR TASK_REASSIGN. */ - if (sess_ref) { - pr_debug("Handle TMR, using sess_ref=true check\n"); - target_put_sess_cmd(&cmd->se_cmd); - } - iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); + target_put_sess_cmd(&cmd->se_cmd); return 0; } EXPORT_SYMBOL(iscsit_handle_task_mgt_cmd);

7 years, 9 months

1
0
0 0

[Linux-stable-mirror] FAILED: patch "[PATCH] iscsi-target: Make TASK_REASSIGN use proper se_cmd->cmd_kref" failed to apply to 4.9-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.9-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From ae072726f6109bb1c94841d6fb3a82dde298ea85 Mon Sep 17 00:00:00 2001 From: Nicholas Bellinger <nab(a)linux-iscsi.org> Date: Fri, 27 Oct 2017 12:32:59 -0700 Subject: [PATCH] iscsi-target: Make TASK_REASSIGN use proper se_cmd->cmd_kref Since commit 59b6986dbf fixed a potential NULL pointer dereference by allocating a se_tmr_req for ISCSI_TM_FUNC_TASK_REASSIGN, the se_tmr_req is currently leaked by iscsit_free_cmd() because no iscsi_cmd->se_cmd.se_tfo was associated. To address this, treat ISCSI_TM_FUNC_TASK_REASSIGN like any other TMR and call transport_init_se_cmd() + target_get_sess_cmd() to setup iscsi_cmd->se_cmd.se_tfo with se_cmd->cmd_kref of 2. This will ensure normal release operation once se_cmd->cmd_kref reaches zero and target_release_cmd_kref() is invoked, se_tmr_req will be released via existing target_free_cmd_mem() and core_tmr_release_req() code. Reported-by: Donald White <dew(a)datera.io> Cc: Donald White <dew(a)datera.io> Cc: Mike Christie <mchristi(a)redhat.com> Cc: Hannes Reinecke <hare(a)suse.com> Cc: stable(a)vger.kernel.org # 3.10+ Signed-off-by: Nicholas Bellinger <nab(a)linux-iscsi.org> diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c index 541f66a875fc..048d4227327c 100644 --- a/drivers/target/iscsi/iscsi_target.c +++ b/drivers/target/iscsi/iscsi_target.c @@ -1955,7 +1955,6 @@ iscsit_handle_task_mgt_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, struct iscsi_tmr_req *tmr_req; struct iscsi_tm *hdr; int out_of_order_cmdsn = 0, ret; - bool sess_ref = false; u8 function, tcm_function = TMR_UNKNOWN; hdr = (struct iscsi_tm *) buf; @@ -1988,22 +1987,23 @@ iscsit_handle_task_mgt_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, cmd->data_direction = DMA_NONE; cmd->tmr_req = kzalloc(sizeof(*cmd->tmr_req), GFP_KERNEL); - if (!cmd->tmr_req) + if (!cmd->tmr_req) { return iscsit_add_reject_cmd(cmd, ISCSI_REASON_BOOKMARK_NO_RESOURCES, buf); + } + + transport_init_se_cmd(&cmd->se_cmd, &iscsi_ops, + conn->sess->se_sess, 0, DMA_NONE, + TCM_SIMPLE_TAG, cmd->sense_buffer + 2); + + target_get_sess_cmd(&cmd->se_cmd, true); /* * TASK_REASSIGN for ERL=2 / connection stays inside of * LIO-Target $FABRIC_MOD */ if (function != ISCSI_TM_FUNC_TASK_REASSIGN) { - transport_init_se_cmd(&cmd->se_cmd, &iscsi_ops, - conn->sess->se_sess, 0, DMA_NONE, - TCM_SIMPLE_TAG, cmd->sense_buffer + 2); - - target_get_sess_cmd(&cmd->se_cmd, true); - sess_ref = true; tcm_function = iscsit_convert_tmf(function); if (tcm_function == TMR_UNKNOWN) { pr_err("Unknown iSCSI TMR Function:" @@ -2119,12 +2119,8 @@ iscsit_handle_task_mgt_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd, * For connection recovery, this is also the default action for * TMR TASK_REASSIGN. */ - if (sess_ref) { - pr_debug("Handle TMR, using sess_ref=true check\n"); - target_put_sess_cmd(&cmd->se_cmd); - } - iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state); + target_put_sess_cmd(&cmd->se_cmd); return 0; } EXPORT_SYMBOL(iscsit_handle_task_mgt_cmd);

7 years, 9 months

1
0
0 0

[Linux-stable-mirror] FAILED: patch "[PATCH] scsi: megaraid_sas: Resize MFA frame used for IOC INIT to 4k" failed to apply to 4.4-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From b9637d14dc00d91cef0068cde1f9a8959b051028 Mon Sep 17 00:00:00 2001 From: Shivasharan S <shivasharan.srikanteshwara(a)broadcom.com> Date: Thu, 19 Oct 2017 02:49:01 -0700 Subject: [PATCH] scsi: megaraid_sas: Resize MFA frame used for IOC INIT to 4k Older firmware version unconditionally pulls 4k frame for IOC INIT MFA frame. But driver allocates 1k or 4k max_chain_frame_sz based on FW capability. During boot time, this results in DMA read errors. Workaround fix in driver by allocating separate ioc_init frame of 4k size to support older firmware. Signed-off-by: Kashyap Desai <kashyap.desai(a)broadcom.com> Signed-off-by: Shivasharan S <shivasharan.srikanteshwara(a)broadcom.com> Cc: stable(a)vger.kernel.org Signed-off-by: Martin K. Petersen <martin.petersen(a)oracle.com> diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c b/drivers/scsi/megaraid/megaraid_sas_fusion.c index 277fd16305ee..857bdbb0f79d 100644 --- a/drivers/scsi/megaraid/megaraid_sas_fusion.c +++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c @@ -780,13 +780,7 @@ megasas_ioc_init_fusion(struct megasas_instance *instance) ioc_init_handle = fusion->ioc_init_request_phys; IOCInitMessage = fusion->ioc_init_request; - cmd = megasas_get_cmd(instance); - - if (!cmd) { - dev_err(&instance->pdev->dev, "Could not allocate cmd for INIT Frame\n"); - ret = 1; - goto fail_get_cmd; - } + cmd = fusion->ioc_init_cmd; scratch_pad_2 = readl (&instance->reg_set->outbound_scratch_pad_2); @@ -918,8 +912,6 @@ megasas_ioc_init_fusion(struct megasas_instance *instance) ret = 0; fail_fw_init: - megasas_return_cmd(instance, cmd); -fail_get_cmd: dev_err(&instance->pdev->dev, "Init cmd return status %s for SCSI host %d\n", ret ? "FAILED" : "SUCCESS", instance->host->host_no); @@ -1333,6 +1325,56 @@ static inline int megasas_allocate_raid_maps(struct megasas_instance *instance) return -ENOMEM; } +static int megasas_alloc_ioc_init_frame(struct megasas_instance *instance) +{ + struct fusion_context *fusion; + struct megasas_cmd *cmd; + + fusion = instance->ctrl_context; + + cmd = kmalloc(sizeof(struct megasas_cmd), GFP_KERNEL); + + if (!cmd) { + dev_err(&instance->pdev->dev, "Failed from func: %s line: %d\n", + __func__, __LINE__); + return -ENOMEM; + } + + cmd->frame = dma_alloc_coherent(&instance->pdev->dev, + IOC_INIT_FRAME_SIZE, + &cmd->frame_phys_addr, GFP_KERNEL); + + if (!cmd->frame) { + dev_err(&instance->pdev->dev, "Failed from func: %s line: %d\n", + __func__, __LINE__); + kfree(cmd); + return -ENOMEM; + } + + fusion->ioc_init_cmd = cmd; + return 0; +} + +/** + * megasas_free_ioc_init_cmd - Free IOC INIT command frame + * @instance: Adapter soft state + */ +static inline void megasas_free_ioc_init_cmd(struct megasas_instance *instance) +{ + struct fusion_context *fusion; + + fusion = instance->ctrl_context; + + if (fusion->ioc_init_cmd && fusion->ioc_init_cmd->frame) + dma_free_coherent(&instance->pdev->dev, + IOC_INIT_FRAME_SIZE, + fusion->ioc_init_cmd->frame, + fusion->ioc_init_cmd->frame_phys_addr); + + if (fusion->ioc_init_cmd) + kfree(fusion->ioc_init_cmd); +} + /** * megasas_init_adapter_fusion - Initializes the FW * @instance: Adapter soft state @@ -1428,6 +1470,9 @@ megasas_init_adapter_fusion(struct megasas_instance *instance) MEGASAS_FUSION_IOCTL_CMDS); sema_init(&instance->ioctl_sem, MEGASAS_FUSION_IOCTL_CMDS); + if (megasas_alloc_ioc_init_frame(instance)) + return 1; + /* * Allocate memory for descriptors * Create a pool of commands @@ -1465,6 +1510,7 @@ megasas_init_adapter_fusion(struct megasas_instance *instance) fail_alloc_cmds: megasas_free_cmds(instance); fail_alloc_mfi_cmds: + megasas_free_ioc_init_cmd(instance); return 1; } @@ -3383,6 +3429,7 @@ megasas_issue_dcmd_fusion(struct megasas_instance *instance, void megasas_release_fusion(struct megasas_instance *instance) { + megasas_free_ioc_init_cmd(instance); megasas_free_cmds(instance); megasas_free_cmds_fusion(instance); diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.h b/drivers/scsi/megaraid/megaraid_sas_fusion.h index 5b3f1dba1ab2..549f86b2e871 100644 --- a/drivers/scsi/megaraid/megaraid_sas_fusion.h +++ b/drivers/scsi/megaraid/megaraid_sas_fusion.h @@ -103,6 +103,7 @@ enum MR_RAID_FLAGS_IO_SUB_TYPE { #define THRESHOLD_REPLY_COUNT 50 #define RAID_1_PEER_CMDS 2 #define JBOD_MAPS_COUNT 2 +#define IOC_INIT_FRAME_SIZE 4096 /* * Raid Context structure which describes MegaRAID specific IO Parameters @@ -1317,6 +1318,7 @@ struct fusion_context { struct LD_STREAM_DETECT **stream_detect_by_ld; dma_addr_t ioc_init_request_phys; struct MPI2_IOC_INIT_REQUEST *ioc_init_request; + struct megasas_cmd *ioc_init_cmd; };

7 years, 9 months

1
0
0 0

[Linux-stable-mirror] FAILED: patch "[PATCH] scsi: megaraid_sas: Resize MFA frame used for IOC INIT to 4k" failed to apply to 4.9-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.9-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From b9637d14dc00d91cef0068cde1f9a8959b051028 Mon Sep 17 00:00:00 2001 From: Shivasharan S <shivasharan.srikanteshwara(a)broadcom.com> Date: Thu, 19 Oct 2017 02:49:01 -0700 Subject: [PATCH] scsi: megaraid_sas: Resize MFA frame used for IOC INIT to 4k Older firmware version unconditionally pulls 4k frame for IOC INIT MFA frame. But driver allocates 1k or 4k max_chain_frame_sz based on FW capability. During boot time, this results in DMA read errors. Workaround fix in driver by allocating separate ioc_init frame of 4k size to support older firmware. Signed-off-by: Kashyap Desai <kashyap.desai(a)broadcom.com> Signed-off-by: Shivasharan S <shivasharan.srikanteshwara(a)broadcom.com> Cc: stable(a)vger.kernel.org Signed-off-by: Martin K. Petersen <martin.petersen(a)oracle.com> diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c b/drivers/scsi/megaraid/megaraid_sas_fusion.c index 277fd16305ee..857bdbb0f79d 100644 --- a/drivers/scsi/megaraid/megaraid_sas_fusion.c +++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c @@ -780,13 +780,7 @@ megasas_ioc_init_fusion(struct megasas_instance *instance) ioc_init_handle = fusion->ioc_init_request_phys; IOCInitMessage = fusion->ioc_init_request; - cmd = megasas_get_cmd(instance); - - if (!cmd) { - dev_err(&instance->pdev->dev, "Could not allocate cmd for INIT Frame\n"); - ret = 1; - goto fail_get_cmd; - } + cmd = fusion->ioc_init_cmd; scratch_pad_2 = readl (&instance->reg_set->outbound_scratch_pad_2); @@ -918,8 +912,6 @@ megasas_ioc_init_fusion(struct megasas_instance *instance) ret = 0; fail_fw_init: - megasas_return_cmd(instance, cmd); -fail_get_cmd: dev_err(&instance->pdev->dev, "Init cmd return status %s for SCSI host %d\n", ret ? "FAILED" : "SUCCESS", instance->host->host_no); @@ -1333,6 +1325,56 @@ static inline int megasas_allocate_raid_maps(struct megasas_instance *instance) return -ENOMEM; } +static int megasas_alloc_ioc_init_frame(struct megasas_instance *instance) +{ + struct fusion_context *fusion; + struct megasas_cmd *cmd; + + fusion = instance->ctrl_context; + + cmd = kmalloc(sizeof(struct megasas_cmd), GFP_KERNEL); + + if (!cmd) { + dev_err(&instance->pdev->dev, "Failed from func: %s line: %d\n", + __func__, __LINE__); + return -ENOMEM; + } + + cmd->frame = dma_alloc_coherent(&instance->pdev->dev, + IOC_INIT_FRAME_SIZE, + &cmd->frame_phys_addr, GFP_KERNEL); + + if (!cmd->frame) { + dev_err(&instance->pdev->dev, "Failed from func: %s line: %d\n", + __func__, __LINE__); + kfree(cmd); + return -ENOMEM; + } + + fusion->ioc_init_cmd = cmd; + return 0; +} + +/** + * megasas_free_ioc_init_cmd - Free IOC INIT command frame + * @instance: Adapter soft state + */ +static inline void megasas_free_ioc_init_cmd(struct megasas_instance *instance) +{ + struct fusion_context *fusion; + + fusion = instance->ctrl_context; + + if (fusion->ioc_init_cmd && fusion->ioc_init_cmd->frame) + dma_free_coherent(&instance->pdev->dev, + IOC_INIT_FRAME_SIZE, + fusion->ioc_init_cmd->frame, + fusion->ioc_init_cmd->frame_phys_addr); + + if (fusion->ioc_init_cmd) + kfree(fusion->ioc_init_cmd); +} + /** * megasas_init_adapter_fusion - Initializes the FW * @instance: Adapter soft state @@ -1428,6 +1470,9 @@ megasas_init_adapter_fusion(struct megasas_instance *instance) MEGASAS_FUSION_IOCTL_CMDS); sema_init(&instance->ioctl_sem, MEGASAS_FUSION_IOCTL_CMDS); + if (megasas_alloc_ioc_init_frame(instance)) + return 1; + /* * Allocate memory for descriptors * Create a pool of commands @@ -1465,6 +1510,7 @@ megasas_init_adapter_fusion(struct megasas_instance *instance) fail_alloc_cmds: megasas_free_cmds(instance); fail_alloc_mfi_cmds: + megasas_free_ioc_init_cmd(instance); return 1; } @@ -3383,6 +3429,7 @@ megasas_issue_dcmd_fusion(struct megasas_instance *instance, void megasas_release_fusion(struct megasas_instance *instance) { + megasas_free_ioc_init_cmd(instance); megasas_free_cmds(instance); megasas_free_cmds_fusion(instance); diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.h b/drivers/scsi/megaraid/megaraid_sas_fusion.h index 5b3f1dba1ab2..549f86b2e871 100644 --- a/drivers/scsi/megaraid/megaraid_sas_fusion.h +++ b/drivers/scsi/megaraid/megaraid_sas_fusion.h @@ -103,6 +103,7 @@ enum MR_RAID_FLAGS_IO_SUB_TYPE { #define THRESHOLD_REPLY_COUNT 50 #define RAID_1_PEER_CMDS 2 #define JBOD_MAPS_COUNT 2 +#define IOC_INIT_FRAME_SIZE 4096 /* * Raid Context structure which describes MegaRAID specific IO Parameters @@ -1317,6 +1318,7 @@ struct fusion_context { struct LD_STREAM_DETECT **stream_detect_by_ld; dma_addr_t ioc_init_request_phys; struct MPI2_IOC_INIT_REQUEST *ioc_init_request; + struct megasas_cmd *ioc_init_cmd; };

7 years, 9 months

1
0
0 0

[Linux-stable-mirror] FAILED: patch "[PATCH] scsi: megaraid_sas: Resize MFA frame used for IOC INIT to 4k" failed to apply to 4.14-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.14-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From b9637d14dc00d91cef0068cde1f9a8959b051028 Mon Sep 17 00:00:00 2001 From: Shivasharan S <shivasharan.srikanteshwara(a)broadcom.com> Date: Thu, 19 Oct 2017 02:49:01 -0700 Subject: [PATCH] scsi: megaraid_sas: Resize MFA frame used for IOC INIT to 4k Older firmware version unconditionally pulls 4k frame for IOC INIT MFA frame. But driver allocates 1k or 4k max_chain_frame_sz based on FW capability. During boot time, this results in DMA read errors. Workaround fix in driver by allocating separate ioc_init frame of 4k size to support older firmware. Signed-off-by: Kashyap Desai <kashyap.desai(a)broadcom.com> Signed-off-by: Shivasharan S <shivasharan.srikanteshwara(a)broadcom.com> Cc: stable(a)vger.kernel.org Signed-off-by: Martin K. Petersen <martin.petersen(a)oracle.com> diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c b/drivers/scsi/megaraid/megaraid_sas_fusion.c index 277fd16305ee..857bdbb0f79d 100644 --- a/drivers/scsi/megaraid/megaraid_sas_fusion.c +++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c @@ -780,13 +780,7 @@ megasas_ioc_init_fusion(struct megasas_instance *instance) ioc_init_handle = fusion->ioc_init_request_phys; IOCInitMessage = fusion->ioc_init_request; - cmd = megasas_get_cmd(instance); - - if (!cmd) { - dev_err(&instance->pdev->dev, "Could not allocate cmd for INIT Frame\n"); - ret = 1; - goto fail_get_cmd; - } + cmd = fusion->ioc_init_cmd; scratch_pad_2 = readl (&instance->reg_set->outbound_scratch_pad_2); @@ -918,8 +912,6 @@ megasas_ioc_init_fusion(struct megasas_instance *instance) ret = 0; fail_fw_init: - megasas_return_cmd(instance, cmd); -fail_get_cmd: dev_err(&instance->pdev->dev, "Init cmd return status %s for SCSI host %d\n", ret ? "FAILED" : "SUCCESS", instance->host->host_no); @@ -1333,6 +1325,56 @@ static inline int megasas_allocate_raid_maps(struct megasas_instance *instance) return -ENOMEM; } +static int megasas_alloc_ioc_init_frame(struct megasas_instance *instance) +{ + struct fusion_context *fusion; + struct megasas_cmd *cmd; + + fusion = instance->ctrl_context; + + cmd = kmalloc(sizeof(struct megasas_cmd), GFP_KERNEL); + + if (!cmd) { + dev_err(&instance->pdev->dev, "Failed from func: %s line: %d\n", + __func__, __LINE__); + return -ENOMEM; + } + + cmd->frame = dma_alloc_coherent(&instance->pdev->dev, + IOC_INIT_FRAME_SIZE, + &cmd->frame_phys_addr, GFP_KERNEL); + + if (!cmd->frame) { + dev_err(&instance->pdev->dev, "Failed from func: %s line: %d\n", + __func__, __LINE__); + kfree(cmd); + return -ENOMEM; + } + + fusion->ioc_init_cmd = cmd; + return 0; +} + +/** + * megasas_free_ioc_init_cmd - Free IOC INIT command frame + * @instance: Adapter soft state + */ +static inline void megasas_free_ioc_init_cmd(struct megasas_instance *instance) +{ + struct fusion_context *fusion; + + fusion = instance->ctrl_context; + + if (fusion->ioc_init_cmd && fusion->ioc_init_cmd->frame) + dma_free_coherent(&instance->pdev->dev, + IOC_INIT_FRAME_SIZE, + fusion->ioc_init_cmd->frame, + fusion->ioc_init_cmd->frame_phys_addr); + + if (fusion->ioc_init_cmd) + kfree(fusion->ioc_init_cmd); +} + /** * megasas_init_adapter_fusion - Initializes the FW * @instance: Adapter soft state @@ -1428,6 +1470,9 @@ megasas_init_adapter_fusion(struct megasas_instance *instance) MEGASAS_FUSION_IOCTL_CMDS); sema_init(&instance->ioctl_sem, MEGASAS_FUSION_IOCTL_CMDS); + if (megasas_alloc_ioc_init_frame(instance)) + return 1; + /* * Allocate memory for descriptors * Create a pool of commands @@ -1465,6 +1510,7 @@ megasas_init_adapter_fusion(struct megasas_instance *instance) fail_alloc_cmds: megasas_free_cmds(instance); fail_alloc_mfi_cmds: + megasas_free_ioc_init_cmd(instance); return 1; } @@ -3383,6 +3429,7 @@ megasas_issue_dcmd_fusion(struct megasas_instance *instance, void megasas_release_fusion(struct megasas_instance *instance) { + megasas_free_ioc_init_cmd(instance); megasas_free_cmds(instance); megasas_free_cmds_fusion(instance); diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.h b/drivers/scsi/megaraid/megaraid_sas_fusion.h index 5b3f1dba1ab2..549f86b2e871 100644 --- a/drivers/scsi/megaraid/megaraid_sas_fusion.h +++ b/drivers/scsi/megaraid/megaraid_sas_fusion.h @@ -103,6 +103,7 @@ enum MR_RAID_FLAGS_IO_SUB_TYPE { #define THRESHOLD_REPLY_COUNT 50 #define RAID_1_PEER_CMDS 2 #define JBOD_MAPS_COUNT 2 +#define IOC_INIT_FRAME_SIZE 4096 /* * Raid Context structure which describes MegaRAID specific IO Parameters @@ -1317,6 +1318,7 @@ struct fusion_context { struct LD_STREAM_DETECT **stream_detect_by_ld; dma_addr_t ioc_init_request_phys; struct MPI2_IOC_INIT_REQUEST *ioc_init_request; + struct megasas_cmd *ioc_init_cmd; };

7 years, 9 months

1
0
0 0

[Linux-stable-mirror] FAILED: patch "[PATCH] net/9p: Switch to wait_event_killable()" failed to apply to 4.4-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 9523feac272ccad2ad8186ba4fcc89103754de52 Mon Sep 17 00:00:00 2001 From: Tuomas Tynkkynen <tuomas(a)tuxera.com> Date: Wed, 6 Sep 2017 17:59:08 +0300 Subject: [PATCH] net/9p: Switch to wait_event_killable() Because userspace gets Very Unhappy when calls like stat() and execve() return -EINTR on 9p filesystem mounts. For instance, when bash is looking in PATH for things to execute and some SIGCHLD interrupts stat(), bash can throw a spurious 'command not found' since it doesn't retry the stat(). In practice, hitting the problem is rare and needs a really slow/bogged down 9p server. Cc: stable(a)vger.kernel.org Signed-off-by: Tuomas Tynkkynen <tuomas(a)tuxera.com> Signed-off-by: Al Viro <viro(a)zeniv.linux.org.uk> diff --git a/net/9p/client.c b/net/9p/client.c index 4674235b0d9b..1beb131dd3e1 100644 --- a/net/9p/client.c +++ b/net/9p/client.c @@ -773,8 +773,7 @@ p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...) } again: /* Wait for the response */ - err = wait_event_interruptible(*req->wq, - req->status >= REQ_STATUS_RCVD); + err = wait_event_killable(*req->wq, req->status >= REQ_STATUS_RCVD); /* * Make sure our req is coherent with regard to updates in other diff --git a/net/9p/trans_virtio.c b/net/9p/trans_virtio.c index f24b25c25106..f3a4efcf1456 100644 --- a/net/9p/trans_virtio.c +++ b/net/9p/trans_virtio.c @@ -286,8 +286,8 @@ p9_virtio_request(struct p9_client *client, struct p9_req_t *req) if (err == -ENOSPC) { chan->ring_bufs_avail = 0; spin_unlock_irqrestore(&chan->lock, flags); - err = wait_event_interruptible(*chan->vc_wq, - chan->ring_bufs_avail); + err = wait_event_killable(*chan->vc_wq, + chan->ring_bufs_avail); if (err == -ERESTARTSYS) return err; @@ -327,7 +327,7 @@ static int p9_get_mapped_pages(struct virtio_chan *chan, * Other zc request to finish here */ if (atomic_read(&vp_pinned) >= chan->p9_max_pages) { - err = wait_event_interruptible(vp_wq, + err = wait_event_killable(vp_wq, (atomic_read(&vp_pinned) < chan->p9_max_pages)); if (err == -ERESTARTSYS) return err; @@ -471,8 +471,8 @@ p9_virtio_zc_request(struct p9_client *client, struct p9_req_t *req, if (err == -ENOSPC) { chan->ring_bufs_avail = 0; spin_unlock_irqrestore(&chan->lock, flags); - err = wait_event_interruptible(*chan->vc_wq, - chan->ring_bufs_avail); + err = wait_event_killable(*chan->vc_wq, + chan->ring_bufs_avail); if (err == -ERESTARTSYS) goto err_out; @@ -489,8 +489,7 @@ p9_virtio_zc_request(struct p9_client *client, struct p9_req_t *req, virtqueue_kick(chan->vq); spin_unlock_irqrestore(&chan->lock, flags); p9_debug(P9_DEBUG_TRANS, "virtio request kicked\n"); - err = wait_event_interruptible(*req->wq, - req->status >= REQ_STATUS_RCVD); + err = wait_event_killable(*req->wq, req->status >= REQ_STATUS_RCVD); /* * Non kernel buffers are pinned, unpin them */ diff --git a/net/9p/trans_xen.c b/net/9p/trans_xen.c index 6ad3e043c617..325c56043007 100644 --- a/net/9p/trans_xen.c +++ b/net/9p/trans_xen.c @@ -156,8 +156,8 @@ static int p9_xen_request(struct p9_client *client, struct p9_req_t *p9_req) ring = &priv->rings[num]; again: - while (wait_event_interruptible(ring->wq, - p9_xen_write_todo(ring, size)) != 0) + while (wait_event_killable(ring->wq, + p9_xen_write_todo(ring, size)) != 0) ; spin_lock_irqsave(&ring->lock, flags);

7 years, 9 months

1
0
0 0

[Linux-stable-mirror] FAILED: patch "[PATCH] net/9p: Switch to wait_event_killable()" failed to apply to 4.9-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.9-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 9523feac272ccad2ad8186ba4fcc89103754de52 Mon Sep 17 00:00:00 2001 From: Tuomas Tynkkynen <tuomas(a)tuxera.com> Date: Wed, 6 Sep 2017 17:59:08 +0300 Subject: [PATCH] net/9p: Switch to wait_event_killable() Because userspace gets Very Unhappy when calls like stat() and execve() return -EINTR on 9p filesystem mounts. For instance, when bash is looking in PATH for things to execute and some SIGCHLD interrupts stat(), bash can throw a spurious 'command not found' since it doesn't retry the stat(). In practice, hitting the problem is rare and needs a really slow/bogged down 9p server. Cc: stable(a)vger.kernel.org Signed-off-by: Tuomas Tynkkynen <tuomas(a)tuxera.com> Signed-off-by: Al Viro <viro(a)zeniv.linux.org.uk> diff --git a/net/9p/client.c b/net/9p/client.c index 4674235b0d9b..1beb131dd3e1 100644 --- a/net/9p/client.c +++ b/net/9p/client.c @@ -773,8 +773,7 @@ p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...) } again: /* Wait for the response */ - err = wait_event_interruptible(*req->wq, - req->status >= REQ_STATUS_RCVD); + err = wait_event_killable(*req->wq, req->status >= REQ_STATUS_RCVD); /* * Make sure our req is coherent with regard to updates in other diff --git a/net/9p/trans_virtio.c b/net/9p/trans_virtio.c index f24b25c25106..f3a4efcf1456 100644 --- a/net/9p/trans_virtio.c +++ b/net/9p/trans_virtio.c @@ -286,8 +286,8 @@ p9_virtio_request(struct p9_client *client, struct p9_req_t *req) if (err == -ENOSPC) { chan->ring_bufs_avail = 0; spin_unlock_irqrestore(&chan->lock, flags); - err = wait_event_interruptible(*chan->vc_wq, - chan->ring_bufs_avail); + err = wait_event_killable(*chan->vc_wq, + chan->ring_bufs_avail); if (err == -ERESTARTSYS) return err; @@ -327,7 +327,7 @@ static int p9_get_mapped_pages(struct virtio_chan *chan, * Other zc request to finish here */ if (atomic_read(&vp_pinned) >= chan->p9_max_pages) { - err = wait_event_interruptible(vp_wq, + err = wait_event_killable(vp_wq, (atomic_read(&vp_pinned) < chan->p9_max_pages)); if (err == -ERESTARTSYS) return err; @@ -471,8 +471,8 @@ p9_virtio_zc_request(struct p9_client *client, struct p9_req_t *req, if (err == -ENOSPC) { chan->ring_bufs_avail = 0; spin_unlock_irqrestore(&chan->lock, flags); - err = wait_event_interruptible(*chan->vc_wq, - chan->ring_bufs_avail); + err = wait_event_killable(*chan->vc_wq, + chan->ring_bufs_avail); if (err == -ERESTARTSYS) goto err_out; @@ -489,8 +489,7 @@ p9_virtio_zc_request(struct p9_client *client, struct p9_req_t *req, virtqueue_kick(chan->vq); spin_unlock_irqrestore(&chan->lock, flags); p9_debug(P9_DEBUG_TRANS, "virtio request kicked\n"); - err = wait_event_interruptible(*req->wq, - req->status >= REQ_STATUS_RCVD); + err = wait_event_killable(*req->wq, req->status >= REQ_STATUS_RCVD); /* * Non kernel buffers are pinned, unpin them */ diff --git a/net/9p/trans_xen.c b/net/9p/trans_xen.c index 6ad3e043c617..325c56043007 100644 --- a/net/9p/trans_xen.c +++ b/net/9p/trans_xen.c @@ -156,8 +156,8 @@ static int p9_xen_request(struct p9_client *client, struct p9_req_t *p9_req) ring = &priv->rings[num]; again: - while (wait_event_interruptible(ring->wq, - p9_xen_write_todo(ring, size)) != 0) + while (wait_event_killable(ring->wq, + p9_xen_write_todo(ring, size)) != 0) ; spin_lock_irqsave(&ring->lock, flags);

7 years, 9 months

1
0
0 0

[Linux-stable-mirror] FAILED: patch "[PATCH] ext4: prevent data corruption with inline data + DAX" failed to apply to 4.9-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.9-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 559db4c6d784ceedc2a5418ced4d357cb843e221 Mon Sep 17 00:00:00 2001 From: Ross Zwisler <ross.zwisler(a)linux.intel.com> Date: Thu, 12 Oct 2017 11:52:34 -0400 Subject: [PATCH] ext4: prevent data corruption with inline data + DAX If an inode has inline data it is currently prevented from using DAX by a check in ext4_set_inode_flags(). When the inode grows inline data via ext4_create_inline_data() or removes its inline data via ext4_destroy_inline_data_nolock(), the value of S_DAX can change. Currently these changes are unsafe because we don't hold off page faults and I/O, write back dirty radix tree entries and invalidate all mappings. There are also issues with mm-level races when changing the value of S_DAX, as well as issues with the VM_MIXEDMAP flag: https://www.spinics.net/lists/linux-xfs/msg09859.html The unsafe transition of S_DAX can reliably cause data corruption, as shown by the following fstest: https://patchwork.kernel.org/patch/9948381/ Fix this issue by preventing the DAX mount option from being used on filesystems that were created to support inline data. Inline data is an option given to mkfs.ext4. Signed-off-by: Ross Zwisler <ross.zwisler(a)linux.intel.com> Signed-off-by: Theodore Ts'o <tytso(a)mit.edu> Reviewed-by: Jan Kara <jack(a)suse.cz> CC: stable(a)vger.kernel.org diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c index f0bbc8cb6555..1367553c43bb 100644 --- a/fs/ext4/inline.c +++ b/fs/ext4/inline.c @@ -303,11 +303,6 @@ static int ext4_create_inline_data(handle_t *handle, EXT4_I(inode)->i_inline_size = len + EXT4_MIN_INLINE_DATA_SIZE; ext4_clear_inode_flag(inode, EXT4_INODE_EXTENTS); ext4_set_inode_flag(inode, EXT4_INODE_INLINE_DATA); - /* - * Propagate changes to inode->i_flags as well - e.g. S_DAX may - * get cleared - */ - ext4_set_inode_flags(inode); get_bh(is.iloc.bh); error = ext4_mark_iloc_dirty(handle, inode, &is.iloc); @@ -452,11 +447,6 @@ static int ext4_destroy_inline_data_nolock(handle_t *handle, } } ext4_clear_inode_flag(inode, EXT4_INODE_INLINE_DATA); - /* - * Propagate changes to inode->i_flags as well - e.g. S_DAX may - * get set. - */ - ext4_set_inode_flags(inode); get_bh(is.iloc.bh); error = ext4_mark_iloc_dirty(handle, inode, &is.iloc); diff --git a/fs/ext4/super.c b/fs/ext4/super.c index b104096fce9e..986475c0d552 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -3708,6 +3708,11 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) } if (sbi->s_mount_opt & EXT4_MOUNT_DAX) { + if (ext4_has_feature_inline_data(sb)) { + ext4_msg(sb, KERN_ERR, "Cannot use DAX on a filesystem" + " that may contain inline data"); + goto failed_mount; + } err = bdev_dax_supported(sb, blocksize); if (err) goto failed_mount;

7 years, 9 months

1
0
0 0

[Linux-stable-mirror] FAILED: patch "[PATCH] ext4: prevent data corruption with inline data + DAX" failed to apply to 4.4-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 559db4c6d784ceedc2a5418ced4d357cb843e221 Mon Sep 17 00:00:00 2001 From: Ross Zwisler <ross.zwisler(a)linux.intel.com> Date: Thu, 12 Oct 2017 11:52:34 -0400 Subject: [PATCH] ext4: prevent data corruption with inline data + DAX If an inode has inline data it is currently prevented from using DAX by a check in ext4_set_inode_flags(). When the inode grows inline data via ext4_create_inline_data() or removes its inline data via ext4_destroy_inline_data_nolock(), the value of S_DAX can change. Currently these changes are unsafe because we don't hold off page faults and I/O, write back dirty radix tree entries and invalidate all mappings. There are also issues with mm-level races when changing the value of S_DAX, as well as issues with the VM_MIXEDMAP flag: https://www.spinics.net/lists/linux-xfs/msg09859.html The unsafe transition of S_DAX can reliably cause data corruption, as shown by the following fstest: https://patchwork.kernel.org/patch/9948381/ Fix this issue by preventing the DAX mount option from being used on filesystems that were created to support inline data. Inline data is an option given to mkfs.ext4. Signed-off-by: Ross Zwisler <ross.zwisler(a)linux.intel.com> Signed-off-by: Theodore Ts'o <tytso(a)mit.edu> Reviewed-by: Jan Kara <jack(a)suse.cz> CC: stable(a)vger.kernel.org diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c index f0bbc8cb6555..1367553c43bb 100644 --- a/fs/ext4/inline.c +++ b/fs/ext4/inline.c @@ -303,11 +303,6 @@ static int ext4_create_inline_data(handle_t *handle, EXT4_I(inode)->i_inline_size = len + EXT4_MIN_INLINE_DATA_SIZE; ext4_clear_inode_flag(inode, EXT4_INODE_EXTENTS); ext4_set_inode_flag(inode, EXT4_INODE_INLINE_DATA); - /* - * Propagate changes to inode->i_flags as well - e.g. S_DAX may - * get cleared - */ - ext4_set_inode_flags(inode); get_bh(is.iloc.bh); error = ext4_mark_iloc_dirty(handle, inode, &is.iloc); @@ -452,11 +447,6 @@ static int ext4_destroy_inline_data_nolock(handle_t *handle, } } ext4_clear_inode_flag(inode, EXT4_INODE_INLINE_DATA); - /* - * Propagate changes to inode->i_flags as well - e.g. S_DAX may - * get set. - */ - ext4_set_inode_flags(inode); get_bh(is.iloc.bh); error = ext4_mark_iloc_dirty(handle, inode, &is.iloc); diff --git a/fs/ext4/super.c b/fs/ext4/super.c index b104096fce9e..986475c0d552 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -3708,6 +3708,11 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) } if (sbi->s_mount_opt & EXT4_MOUNT_DAX) { + if (ext4_has_feature_inline_data(sb)) { + ext4_msg(sb, KERN_ERR, "Cannot use DAX on a filesystem" + " that may contain inline data"); + goto failed_mount; + } err = bdev_dax_supported(sb, blocksize); if (err) goto failed_mount;

7 years, 9 months

1
0
0 0

[Linux-stable-mirror] FAILED: patch "[PATCH] ext4: prevent data corruption with journaling + DAX" failed to apply to 4.4-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From e9072d859df3e0f2c3ba450f0d1739595c2d5d13 Mon Sep 17 00:00:00 2001 From: Ross Zwisler <ross.zwisler(a)linux.intel.com> Date: Thu, 12 Oct 2017 11:54:08 -0400 Subject: [PATCH] ext4: prevent data corruption with journaling + DAX The current code has the potential for data corruption when changing an inode's journaling mode, as that can result in a subsequent unsafe change in S_DAX. I've captured an instance of this data corruption in the following fstest: https://patchwork.kernel.org/patch/9948377/ Prevent this data corruption from happening by disallowing changes to the journaling mode if the '-o dax' mount option was used. This means that for a given filesystem we could have a mix of inodes using either DAX or data journaling, but whatever state the inodes are in will be held for the duration of the mount. Signed-off-by: Ross Zwisler <ross.zwisler(a)linux.intel.com> Signed-off-by: Theodore Ts'o <tytso(a)mit.edu> Reviewed-by: Jan Kara <jack(a)suse.cz> Cc: stable(a)vger.kernel.org diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index edfe95f81274..350e0910ed32 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -6004,11 +6004,6 @@ int ext4_change_inode_journal_flag(struct inode *inode, int val) ext4_clear_inode_flag(inode, EXT4_INODE_JOURNAL_DATA); } ext4_set_aops(inode); - /* - * Update inode->i_flags after EXT4_INODE_JOURNAL_DATA was updated. - * E.g. S_DAX may get cleared / set. - */ - ext4_set_inode_flags(inode); jbd2_journal_unlock_updates(journal); percpu_up_write(&sbi->s_journal_flag_rwsem); diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c index afb66d4ab5cf..b0b754b37c36 100644 --- a/fs/ext4/ioctl.c +++ b/fs/ext4/ioctl.c @@ -290,10 +290,20 @@ static int ext4_ioctl_setflags(struct inode *inode, if (err) goto flags_out; - if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) + if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) { + /* + * Changes to the journaling mode can cause unsafe changes to + * S_DAX if we are using the DAX mount option. + */ + if (test_opt(inode->i_sb, DAX)) { + err = -EBUSY; + goto flags_out; + } + err = ext4_change_inode_journal_flag(inode, jflag); - if (err) - goto flags_out; + if (err) + goto flags_out; + } if (migrate) { if (flags & EXT4_EXTENTS_FL) err = ext4_ext_migrate(inode);

7 years, 9 months

1
0
0 0

[Linux-stable-mirror] FAILED: patch "[PATCH] ext4: prevent data corruption with journaling + DAX" failed to apply to 4.9-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.9-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From e9072d859df3e0f2c3ba450f0d1739595c2d5d13 Mon Sep 17 00:00:00 2001 From: Ross Zwisler <ross.zwisler(a)linux.intel.com> Date: Thu, 12 Oct 2017 11:54:08 -0400 Subject: [PATCH] ext4: prevent data corruption with journaling + DAX The current code has the potential for data corruption when changing an inode's journaling mode, as that can result in a subsequent unsafe change in S_DAX. I've captured an instance of this data corruption in the following fstest: https://patchwork.kernel.org/patch/9948377/ Prevent this data corruption from happening by disallowing changes to the journaling mode if the '-o dax' mount option was used. This means that for a given filesystem we could have a mix of inodes using either DAX or data journaling, but whatever state the inodes are in will be held for the duration of the mount. Signed-off-by: Ross Zwisler <ross.zwisler(a)linux.intel.com> Signed-off-by: Theodore Ts'o <tytso(a)mit.edu> Reviewed-by: Jan Kara <jack(a)suse.cz> Cc: stable(a)vger.kernel.org diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index edfe95f81274..350e0910ed32 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -6004,11 +6004,6 @@ int ext4_change_inode_journal_flag(struct inode *inode, int val) ext4_clear_inode_flag(inode, EXT4_INODE_JOURNAL_DATA); } ext4_set_aops(inode); - /* - * Update inode->i_flags after EXT4_INODE_JOURNAL_DATA was updated. - * E.g. S_DAX may get cleared / set. - */ - ext4_set_inode_flags(inode); jbd2_journal_unlock_updates(journal); percpu_up_write(&sbi->s_journal_flag_rwsem); diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c index afb66d4ab5cf..b0b754b37c36 100644 --- a/fs/ext4/ioctl.c +++ b/fs/ext4/ioctl.c @@ -290,10 +290,20 @@ static int ext4_ioctl_setflags(struct inode *inode, if (err) goto flags_out; - if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) + if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) { + /* + * Changes to the journaling mode can cause unsafe changes to + * S_DAX if we are using the DAX mount option. + */ + if (test_opt(inode->i_sb, DAX)) { + err = -EBUSY; + goto flags_out; + } + err = ext4_change_inode_journal_flag(inode, jflag); - if (err) - goto flags_out; + if (err) + goto flags_out; + } if (migrate) { if (flags & EXT4_EXTENTS_FL) err = ext4_ext_migrate(inode);

7 years, 9 months

1
0
0 0

[Linux-stable-mirror] FAILED: patch "[PATCH] md: forbid a RAID5 from having both a bitmap and a journal." failed to apply to 4.14-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.14-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 230b55fa8d64007339319539f8f8e68114d08529 Mon Sep 17 00:00:00 2001 From: NeilBrown <neilb(a)suse.com> Date: Tue, 17 Oct 2017 14:24:09 +1100 Subject: [PATCH] md: forbid a RAID5 from having both a bitmap and a journal. Having both a bitmap and a journal is pointless. Attempting to do so can corrupt the bitmap if the journal replay happens before the bitmap is initialized. Rather than try to avoid this corruption, simply refuse to allow arrays with both a bitmap and a journal. So: - if raid5_run sees both are present, fail. - if adding a bitmap finds a journal is present, fail - if adding a journal finds a bitmap is present, fail. Cc: stable(a)vger.kernel.org (4.10+) Signed-off-by: NeilBrown <neilb(a)suse.com> Tested-by: Joshua Kinard <kumba(a)gentoo.org> Acked-by: Joshua Kinard <kumba(a)gentoo.org> Signed-off-by: Shaohua Li <shli(a)fb.com> diff --git a/drivers/md/md-bitmap.c b/drivers/md/md-bitmap.c index b843b53b0f65..d1b3b60669ea 100644 --- a/drivers/md/md-bitmap.c +++ b/drivers/md/md-bitmap.c @@ -1816,6 +1816,12 @@ struct bitmap *bitmap_create(struct mddev *mddev, int slot) BUG_ON(file && mddev->bitmap_info.offset); + if (test_bit(MD_HAS_JOURNAL, &mddev->flags)) { + pr_notice("md/raid:%s: array with journal cannot have bitmap\n", + mdname(mddev)); + return ERR_PTR(-EBUSY); + } + bitmap = kzalloc(sizeof(*bitmap), GFP_KERNEL); if (!bitmap) return ERR_PTR(-ENOMEM); diff --git a/drivers/md/md.c b/drivers/md/md.c index 97afb28c6f51..6f25e3f1a1cf 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -6362,7 +6362,7 @@ static int add_new_disk(struct mddev *mddev, mdu_disk_info_t *info) break; } } - if (has_journal) { + if (has_journal || mddev->bitmap) { export_rdev(rdev); return -EBUSY; } diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index a21dbd22a2fb..a8732955f130 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -7159,6 +7159,13 @@ static int raid5_run(struct mddev *mddev) min_offset_diff = diff; } + if ((test_bit(MD_HAS_JOURNAL, &mddev->flags) || journal_dev) && + (mddev->bitmap_info.offset || mddev->bitmap_info.file)) { + pr_notice("md/raid:%s: array cannot have both journal and bitmap\n", + mdname(mddev)); + return -EINVAL; + } + if (mddev->reshape_position != MaxSector) { /* Check that we can continue the reshape. * Difficulties arise if the stripe we would write to

7 years, 9 months

1
0
0 0

[Linux-stable-mirror] FAILED: patch "[PATCH] NFS: revalidate "." etc correctly on "open"." failed to apply to 3.18-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 3.18-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From b688741cb06695312f18b730653d6611e1bad28d Mon Sep 17 00:00:00 2001 From: NeilBrown <neilb(a)suse.com> Date: Fri, 25 Aug 2017 17:34:41 +1000 Subject: [PATCH] NFS: revalidate "." etc correctly on "open". For correct close-to-open semantics, NFS must validate the change attribute of a directory (or file) on open. Since commit ecf3d1f1aa74 ("vfs: kill FS_REVAL_DOT by adding a d_weak_revalidate dentry op"), open() of "." or a path ending ".." is not revalidated reliably (except when that direct is a mount point). Prior to that commit, "." was revalidated using nfs_lookup_revalidate() which checks the LOOKUP_OPEN flag and forces revalidation if the flag is set. Since that commit, nfs_weak_revalidate() is used for NFSv3 (which ignores the flags) and nothing is used for NFSv4. This is fixed by using nfs_lookup_verify_inode() in nfs_weak_revalidate(). This does the revalidation exactly when needed. Also, add a definition of .d_weak_revalidate for NFSv4. The incorrect behavior is easily demonstrated by running "echo *" in some non-mountpoint NFS directory while watching network traffic. Without this patch, "echo *" sometimes doesn't produce any traffic. With the patch it always does. Fixes: ecf3d1f1aa74 ("vfs: kill FS_REVAL_DOT by adding a d_weak_revalidate dentry op") cc: stable(a)vger.kernel.org (3.9+) Signed-off-by: NeilBrown <neilb(a)suse.com> Signed-off-by: Anna Schumaker <Anna.Schumaker(a)Netapp.com> diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index db482d4c15d5..c583093a066b 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -1241,8 +1241,7 @@ static int nfs_weak_revalidate(struct dentry *dentry, unsigned int flags) return 0; } - if (nfs_mapping_need_revalidate_inode(inode)) - error = __nfs_revalidate_inode(NFS_SERVER(inode), inode); + error = nfs_lookup_verify_inode(inode, flags); dfprintk(LOOKUPCACHE, "NFS: %s: inode %lu is %s\n", __func__, inode->i_ino, error ? "invalid" : "valid"); return !error; @@ -1393,6 +1392,7 @@ static int nfs4_lookup_revalidate(struct dentry *, unsigned int); const struct dentry_operations nfs4_dentry_operations = { .d_revalidate = nfs4_lookup_revalidate, + .d_weak_revalidate = nfs_weak_revalidate, .d_delete = nfs_dentry_delete, .d_iput = nfs_dentry_iput, .d_automount = nfs_d_automount,

7 years, 9 months

1
0
0 0

[Linux-stable-mirror] FAILED: patch "[PATCH] NFS: revalidate "." etc correctly on "open"." failed to apply to 4.4-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From b688741cb06695312f18b730653d6611e1bad28d Mon Sep 17 00:00:00 2001 From: NeilBrown <neilb(a)suse.com> Date: Fri, 25 Aug 2017 17:34:41 +1000 Subject: [PATCH] NFS: revalidate "." etc correctly on "open". For correct close-to-open semantics, NFS must validate the change attribute of a directory (or file) on open. Since commit ecf3d1f1aa74 ("vfs: kill FS_REVAL_DOT by adding a d_weak_revalidate dentry op"), open() of "." or a path ending ".." is not revalidated reliably (except when that direct is a mount point). Prior to that commit, "." was revalidated using nfs_lookup_revalidate() which checks the LOOKUP_OPEN flag and forces revalidation if the flag is set. Since that commit, nfs_weak_revalidate() is used for NFSv3 (which ignores the flags) and nothing is used for NFSv4. This is fixed by using nfs_lookup_verify_inode() in nfs_weak_revalidate(). This does the revalidation exactly when needed. Also, add a definition of .d_weak_revalidate for NFSv4. The incorrect behavior is easily demonstrated by running "echo *" in some non-mountpoint NFS directory while watching network traffic. Without this patch, "echo *" sometimes doesn't produce any traffic. With the patch it always does. Fixes: ecf3d1f1aa74 ("vfs: kill FS_REVAL_DOT by adding a d_weak_revalidate dentry op") cc: stable(a)vger.kernel.org (3.9+) Signed-off-by: NeilBrown <neilb(a)suse.com> Signed-off-by: Anna Schumaker <Anna.Schumaker(a)Netapp.com> diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index db482d4c15d5..c583093a066b 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -1241,8 +1241,7 @@ static int nfs_weak_revalidate(struct dentry *dentry, unsigned int flags) return 0; } - if (nfs_mapping_need_revalidate_inode(inode)) - error = __nfs_revalidate_inode(NFS_SERVER(inode), inode); + error = nfs_lookup_verify_inode(inode, flags); dfprintk(LOOKUPCACHE, "NFS: %s: inode %lu is %s\n", __func__, inode->i_ino, error ? "invalid" : "valid"); return !error; @@ -1393,6 +1392,7 @@ static int nfs4_lookup_revalidate(struct dentry *, unsigned int); const struct dentry_operations nfs4_dentry_operations = { .d_revalidate = nfs4_lookup_revalidate, + .d_weak_revalidate = nfs_weak_revalidate, .d_delete = nfs_dentry_delete, .d_iput = nfs_dentry_iput, .d_automount = nfs_d_automount,

7 years, 9 months

1
0
0 0

[Linux-stable-mirror] FAILED: patch "[PATCH] NFS: revalidate "." etc correctly on "open"." failed to apply to 4.9-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.9-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From b688741cb06695312f18b730653d6611e1bad28d Mon Sep 17 00:00:00 2001 From: NeilBrown <neilb(a)suse.com> Date: Fri, 25 Aug 2017 17:34:41 +1000 Subject: [PATCH] NFS: revalidate "." etc correctly on "open". For correct close-to-open semantics, NFS must validate the change attribute of a directory (or file) on open. Since commit ecf3d1f1aa74 ("vfs: kill FS_REVAL_DOT by adding a d_weak_revalidate dentry op"), open() of "." or a path ending ".." is not revalidated reliably (except when that direct is a mount point). Prior to that commit, "." was revalidated using nfs_lookup_revalidate() which checks the LOOKUP_OPEN flag and forces revalidation if the flag is set. Since that commit, nfs_weak_revalidate() is used for NFSv3 (which ignores the flags) and nothing is used for NFSv4. This is fixed by using nfs_lookup_verify_inode() in nfs_weak_revalidate(). This does the revalidation exactly when needed. Also, add a definition of .d_weak_revalidate for NFSv4. The incorrect behavior is easily demonstrated by running "echo *" in some non-mountpoint NFS directory while watching network traffic. Without this patch, "echo *" sometimes doesn't produce any traffic. With the patch it always does. Fixes: ecf3d1f1aa74 ("vfs: kill FS_REVAL_DOT by adding a d_weak_revalidate dentry op") cc: stable(a)vger.kernel.org (3.9+) Signed-off-by: NeilBrown <neilb(a)suse.com> Signed-off-by: Anna Schumaker <Anna.Schumaker(a)Netapp.com> diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index db482d4c15d5..c583093a066b 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -1241,8 +1241,7 @@ static int nfs_weak_revalidate(struct dentry *dentry, unsigned int flags) return 0; } - if (nfs_mapping_need_revalidate_inode(inode)) - error = __nfs_revalidate_inode(NFS_SERVER(inode), inode); + error = nfs_lookup_verify_inode(inode, flags); dfprintk(LOOKUPCACHE, "NFS: %s: inode %lu is %s\n", __func__, inode->i_ino, error ? "invalid" : "valid"); return !error; @@ -1393,6 +1392,7 @@ static int nfs4_lookup_revalidate(struct dentry *, unsigned int); const struct dentry_operations nfs4_dentry_operations = { .d_revalidate = nfs4_lookup_revalidate, + .d_weak_revalidate = nfs_weak_revalidate, .d_delete = nfs_dentry_delete, .d_iput = nfs_dentry_iput, .d_automount = nfs_d_automount,

7 years, 9 months

1
0
0 0

[Linux-stable-mirror] FAILED: patch "[PATCH] NFS: Avoid RCU usage in tracepoints" failed to apply to 3.18-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 3.18-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 3944369db701f075092357b511fd9f5755771585 Mon Sep 17 00:00:00 2001 From: Anna Schumaker <Anna.Schumaker(a)Netapp.com> Date: Wed, 1 Nov 2017 15:48:43 -0400 Subject: [PATCH] NFS: Avoid RCU usage in tracepoints There isn't an obvious way to acquire and release the RCU lock during a tracepoint, so we can't use the rpc_peeraddr2str() function here. Instead, rely on the client's cl_hostname, which should have similar enough information without needing an rcu_dereference(). Reported-by: Dave Jones <davej(a)codemonkey.org.uk> Cc: stable(a)vger.kernel.org # v3.12 Signed-off-by: Anna Schumaker <Anna.Schumaker(a)Netapp.com> diff --git a/fs/nfs/nfs4trace.h b/fs/nfs/nfs4trace.h index be1da19c65d6..7a5588c25f70 100644 --- a/fs/nfs/nfs4trace.h +++ b/fs/nfs/nfs4trace.h @@ -201,17 +201,13 @@ DECLARE_EVENT_CLASS(nfs4_clientid_event, TP_ARGS(clp, error), TP_STRUCT__entry( - __string(dstaddr, - rpc_peeraddr2str(clp->cl_rpcclient, - RPC_DISPLAY_ADDR)) + __string(dstaddr, clp->cl_hostname) __field(int, error) ), TP_fast_assign( __entry->error = error; - __assign_str(dstaddr, - rpc_peeraddr2str(clp->cl_rpcclient, - RPC_DISPLAY_ADDR)); + __assign_str(dstaddr, clp->cl_hostname); ), TP_printk( @@ -1132,9 +1128,7 @@ DECLARE_EVENT_CLASS(nfs4_inode_callback_event, __field(dev_t, dev) __field(u32, fhandle) __field(u64, fileid) - __string(dstaddr, clp ? - rpc_peeraddr2str(clp->cl_rpcclient, - RPC_DISPLAY_ADDR) : "unknown") + __string(dstaddr, clp ? clp->cl_hostname : "unknown") ), TP_fast_assign( @@ -1147,9 +1141,7 @@ DECLARE_EVENT_CLASS(nfs4_inode_callback_event, __entry->fileid = 0; __entry->dev = 0; } - __assign_str(dstaddr, clp ? - rpc_peeraddr2str(clp->cl_rpcclient, - RPC_DISPLAY_ADDR) : "unknown") + __assign_str(dstaddr, clp ? clp->cl_hostname : "unknown") ), TP_printk( @@ -1191,9 +1183,7 @@ DECLARE_EVENT_CLASS(nfs4_inode_stateid_callback_event, __field(dev_t, dev) __field(u32, fhandle) __field(u64, fileid) - __string(dstaddr, clp ? - rpc_peeraddr2str(clp->cl_rpcclient, - RPC_DISPLAY_ADDR) : "unknown") + __string(dstaddr, clp ? clp->cl_hostname : "unknown") __field(int, stateid_seq) __field(u32, stateid_hash) ), @@ -1208,9 +1198,7 @@ DECLARE_EVENT_CLASS(nfs4_inode_stateid_callback_event, __entry->fileid = 0; __entry->dev = 0; } - __assign_str(dstaddr, clp ? - rpc_peeraddr2str(clp->cl_rpcclient, - RPC_DISPLAY_ADDR) : "unknown") + __assign_str(dstaddr, clp ? clp->cl_hostname : "unknown") __entry->stateid_seq = be32_to_cpu(stateid->seqid); __entry->stateid_hash =

7 years, 9 months

1
0
0 0

[Linux-stable-mirror] FAILED: patch "[PATCH] NFS: Avoid RCU usage in tracepoints" failed to apply to 4.4-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 3944369db701f075092357b511fd9f5755771585 Mon Sep 17 00:00:00 2001 From: Anna Schumaker <Anna.Schumaker(a)Netapp.com> Date: Wed, 1 Nov 2017 15:48:43 -0400 Subject: [PATCH] NFS: Avoid RCU usage in tracepoints There isn't an obvious way to acquire and release the RCU lock during a tracepoint, so we can't use the rpc_peeraddr2str() function here. Instead, rely on the client's cl_hostname, which should have similar enough information without needing an rcu_dereference(). Reported-by: Dave Jones <davej(a)codemonkey.org.uk> Cc: stable(a)vger.kernel.org # v3.12 Signed-off-by: Anna Schumaker <Anna.Schumaker(a)Netapp.com> diff --git a/fs/nfs/nfs4trace.h b/fs/nfs/nfs4trace.h index be1da19c65d6..7a5588c25f70 100644 --- a/fs/nfs/nfs4trace.h +++ b/fs/nfs/nfs4trace.h @@ -201,17 +201,13 @@ DECLARE_EVENT_CLASS(nfs4_clientid_event, TP_ARGS(clp, error), TP_STRUCT__entry( - __string(dstaddr, - rpc_peeraddr2str(clp->cl_rpcclient, - RPC_DISPLAY_ADDR)) + __string(dstaddr, clp->cl_hostname) __field(int, error) ), TP_fast_assign( __entry->error = error; - __assign_str(dstaddr, - rpc_peeraddr2str(clp->cl_rpcclient, - RPC_DISPLAY_ADDR)); + __assign_str(dstaddr, clp->cl_hostname); ), TP_printk( @@ -1132,9 +1128,7 @@ DECLARE_EVENT_CLASS(nfs4_inode_callback_event, __field(dev_t, dev) __field(u32, fhandle) __field(u64, fileid) - __string(dstaddr, clp ? - rpc_peeraddr2str(clp->cl_rpcclient, - RPC_DISPLAY_ADDR) : "unknown") + __string(dstaddr, clp ? clp->cl_hostname : "unknown") ), TP_fast_assign( @@ -1147,9 +1141,7 @@ DECLARE_EVENT_CLASS(nfs4_inode_callback_event, __entry->fileid = 0; __entry->dev = 0; } - __assign_str(dstaddr, clp ? - rpc_peeraddr2str(clp->cl_rpcclient, - RPC_DISPLAY_ADDR) : "unknown") + __assign_str(dstaddr, clp ? clp->cl_hostname : "unknown") ), TP_printk( @@ -1191,9 +1183,7 @@ DECLARE_EVENT_CLASS(nfs4_inode_stateid_callback_event, __field(dev_t, dev) __field(u32, fhandle) __field(u64, fileid) - __string(dstaddr, clp ? - rpc_peeraddr2str(clp->cl_rpcclient, - RPC_DISPLAY_ADDR) : "unknown") + __string(dstaddr, clp ? clp->cl_hostname : "unknown") __field(int, stateid_seq) __field(u32, stateid_hash) ), @@ -1208,9 +1198,7 @@ DECLARE_EVENT_CLASS(nfs4_inode_stateid_callback_event, __entry->fileid = 0; __entry->dev = 0; } - __assign_str(dstaddr, clp ? - rpc_peeraddr2str(clp->cl_rpcclient, - RPC_DISPLAY_ADDR) : "unknown") + __assign_str(dstaddr, clp ? clp->cl_hostname : "unknown") __entry->stateid_seq = be32_to_cpu(stateid->seqid); __entry->stateid_hash =

7 years, 9 months

1
0
0 0

[Linux-stable-mirror] FAILED: patch "[PATCH] btrfs: change how we decide to commit transactions during" failed to apply to 4.9-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.9-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 996478ca9c460886ac147eb0d00e99841b71d31b Mon Sep 17 00:00:00 2001 From: Josef Bacik <jbacik(a)fb.com> Date: Tue, 22 Aug 2017 16:00:39 -0400 Subject: [PATCH] btrfs: change how we decide to commit transactions during flushing Nikolay reported that generic/273 was failing currently with ENOSPC. Turns out this is because we get to the point where the outstanding reservations are greater than the pinned space on the fs. This is a mistake, previously we used the current reservation amount in may_commit_transaction, not the entire outstanding reservation amount. Fix this to find the minimum byte size needed to make progress in flushing, and pass that into may_commit_transaction. From there we can make a smarter decision on whether to commit the transaction or not. This fixes the failure in generic/273. >From Nikolai, IOW: when we go to the final stage of deciding whether to do trans commit, instead of passing all the reservations from all tickets we just pass the reservation for the current ticket. Otherwise, in case all reservations exceed pinned space, then we don't commit transaction and fail prematurely. Before we passed num_bytes from flush_space, where num_bytes was the sum of all pending reserverations, but now all we do is take the first ticket and commit the trans if we can satisfy that. Fixes: 957780eb2788 ("Btrfs: introduce ticketed enospc infrastructure") Cc: stable(a)vger.kernel.org # 4.8 Reported-by: Nikolay Borisov <nborisov(a)suse.com> Signed-off-by: Josef Bacik <jbacik(a)fb.com> Reviewed-by: Nikolay Borisov <nborisov(a)suse.com> Tested-by: Nikolay Borisov <nborisov(a)suse.com> [ added Nikolai's comment ] Signed-off-by: David Sterba <dsterba(a)suse.com> diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index eccaac17258d..1a6aced00a19 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -4907,6 +4907,13 @@ static void shrink_delalloc(struct btrfs_fs_info *fs_info, u64 to_reclaim, } } +struct reserve_ticket { + u64 bytes; + int error; + struct list_head list; + wait_queue_head_t wait; +}; + /** * maybe_commit_transaction - possibly commit the transaction if its ok to * @root - the root we're allocating for @@ -4918,18 +4925,29 @@ static void shrink_delalloc(struct btrfs_fs_info *fs_info, u64 to_reclaim, * will return -ENOSPC. */ static int may_commit_transaction(struct btrfs_fs_info *fs_info, - struct btrfs_space_info *space_info, - u64 bytes, int force) + struct btrfs_space_info *space_info) { + struct reserve_ticket *ticket = NULL; struct btrfs_block_rsv *delayed_rsv = &fs_info->delayed_block_rsv; struct btrfs_trans_handle *trans; + u64 bytes; trans = (struct btrfs_trans_handle *)current->journal_info; if (trans) return -EAGAIN; - if (force) - goto commit; + spin_lock(&space_info->lock); + if (!list_empty(&space_info->priority_tickets)) + ticket = list_first_entry(&space_info->priority_tickets, + struct reserve_ticket, list); + else if (!list_empty(&space_info->tickets)) + ticket = list_first_entry(&space_info->tickets, + struct reserve_ticket, list); + bytes = (ticket) ? ticket->bytes : 0; + spin_unlock(&space_info->lock); + + if (!bytes) + return 0; /* See if there is enough pinned space to make this reservation */ if (percpu_counter_compare(&space_info->total_bytes_pinned, @@ -4944,8 +4962,12 @@ static int may_commit_transaction(struct btrfs_fs_info *fs_info, return -ENOSPC; spin_lock(&delayed_rsv->lock); + if (delayed_rsv->size > bytes) + bytes = 0; + else + bytes -= delayed_rsv->size; if (percpu_counter_compare(&space_info->total_bytes_pinned, - bytes - delayed_rsv->size) < 0) { + bytes) < 0) { spin_unlock(&delayed_rsv->lock); return -ENOSPC; } @@ -4959,13 +4981,6 @@ static int may_commit_transaction(struct btrfs_fs_info *fs_info, return btrfs_commit_transaction(trans); } -struct reserve_ticket { - u64 bytes; - int error; - struct list_head list; - wait_queue_head_t wait; -}; - /* * Try to flush some data based on policy set by @state. This is only advisory * and may fail for various reasons. The caller is supposed to examine the @@ -5015,8 +5030,7 @@ static void flush_space(struct btrfs_fs_info *fs_info, ret = 0; break; case COMMIT_TRANS: - ret = may_commit_transaction(fs_info, space_info, - num_bytes, 0); + ret = may_commit_transaction(fs_info, space_info); break; default: ret = -ENOSPC;

7 years, 9 months

1
0
0 0

[Linux-stable-mirror] FAILED: patch "[PATCH] fscrypt: lock mutex before checking for bounce page pool" failed to apply to 4.4-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From a0b3bc855374c50b5ea85273553485af48caf2f7 Mon Sep 17 00:00:00 2001 From: Eric Biggers <ebiggers(a)google.com> Date: Sun, 29 Oct 2017 06:30:19 -0400 Subject: [PATCH] fscrypt: lock mutex before checking for bounce page pool fscrypt_initialize(), which allocates the global bounce page pool when an encrypted file is first accessed, uses "double-checked locking" to try to avoid locking fscrypt_init_mutex. However, it doesn't use any memory barriers, so it's theoretically possible for a thread to observe a bounce page pool which has not been fully initialized. This is a classic bug with "double-checked locking". While "only a theoretical issue" in the latest kernel, in pre-4.8 kernels the pointer that was checked was not even the last to be initialized, so it was easily possible for a crash (NULL pointer dereference) to happen. This was changed only incidentally by the large refactor to use fs/crypto/. Solve both problems in a trivial way that can easily be backported: just always take the mutex. It's theoretically less efficient, but it shouldn't be noticeable in practice as the mutex is only acquired very briefly once per encrypted file. Later I'd like to make this use a helper macro like DO_ONCE(). However, DO_ONCE() runs in atomic context, so we'd need to add a new macro that allows blocking. Cc: stable(a)vger.kernel.org # v4.1+ Signed-off-by: Eric Biggers <ebiggers(a)google.com> Signed-off-by: Theodore Ts'o <tytso(a)mit.edu> diff --git a/fs/crypto/crypto.c b/fs/crypto/crypto.c index 608f6bbe0f31..472326737717 100644 --- a/fs/crypto/crypto.c +++ b/fs/crypto/crypto.c @@ -410,11 +410,8 @@ int fscrypt_initialize(unsigned int cop_flags) { int i, res = -ENOMEM; - /* - * No need to allocate a bounce page pool if there already is one or - * this FS won't use it. - */ - if (cop_flags & FS_CFLG_OWN_PAGES || fscrypt_bounce_page_pool) + /* No need to allocate a bounce page pool if this FS won't use it. */ + if (cop_flags & FS_CFLG_OWN_PAGES) return 0; mutex_lock(&fscrypt_init_mutex);

7 years, 9 months

1
0
0 0

[Linux-stable-mirror] FAILED: patch "[PATCH] fscrypt: lock mutex before checking for bounce page pool" failed to apply to 4.1-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.1-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From a0b3bc855374c50b5ea85273553485af48caf2f7 Mon Sep 17 00:00:00 2001 From: Eric Biggers <ebiggers(a)google.com> Date: Sun, 29 Oct 2017 06:30:19 -0400 Subject: [PATCH] fscrypt: lock mutex before checking for bounce page pool fscrypt_initialize(), which allocates the global bounce page pool when an encrypted file is first accessed, uses "double-checked locking" to try to avoid locking fscrypt_init_mutex. However, it doesn't use any memory barriers, so it's theoretically possible for a thread to observe a bounce page pool which has not been fully initialized. This is a classic bug with "double-checked locking". While "only a theoretical issue" in the latest kernel, in pre-4.8 kernels the pointer that was checked was not even the last to be initialized, so it was easily possible for a crash (NULL pointer dereference) to happen. This was changed only incidentally by the large refactor to use fs/crypto/. Solve both problems in a trivial way that can easily be backported: just always take the mutex. It's theoretically less efficient, but it shouldn't be noticeable in practice as the mutex is only acquired very briefly once per encrypted file. Later I'd like to make this use a helper macro like DO_ONCE(). However, DO_ONCE() runs in atomic context, so we'd need to add a new macro that allows blocking. Cc: stable(a)vger.kernel.org # v4.1+ Signed-off-by: Eric Biggers <ebiggers(a)google.com> Signed-off-by: Theodore Ts'o <tytso(a)mit.edu> diff --git a/fs/crypto/crypto.c b/fs/crypto/crypto.c index 608f6bbe0f31..472326737717 100644 --- a/fs/crypto/crypto.c +++ b/fs/crypto/crypto.c @@ -410,11 +410,8 @@ int fscrypt_initialize(unsigned int cop_flags) { int i, res = -ENOMEM; - /* - * No need to allocate a bounce page pool if there already is one or - * this FS won't use it. - */ - if (cop_flags & FS_CFLG_OWN_PAGES || fscrypt_bounce_page_pool) + /* No need to allocate a bounce page pool if this FS won't use it. */ + if (cop_flags & FS_CFLG_OWN_PAGES) return 0; mutex_lock(&fscrypt_init_mutex);

7 years, 9 months

1
0
0 0

[Linux-stable-mirror] FAILED: patch "[PATCH] fscrypt: lock mutex before checking for bounce page pool" failed to apply to 4.9-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.9-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From a0b3bc855374c50b5ea85273553485af48caf2f7 Mon Sep 17 00:00:00 2001 From: Eric Biggers <ebiggers(a)google.com> Date: Sun, 29 Oct 2017 06:30:19 -0400 Subject: [PATCH] fscrypt: lock mutex before checking for bounce page pool fscrypt_initialize(), which allocates the global bounce page pool when an encrypted file is first accessed, uses "double-checked locking" to try to avoid locking fscrypt_init_mutex. However, it doesn't use any memory barriers, so it's theoretically possible for a thread to observe a bounce page pool which has not been fully initialized. This is a classic bug with "double-checked locking". While "only a theoretical issue" in the latest kernel, in pre-4.8 kernels the pointer that was checked was not even the last to be initialized, so it was easily possible for a crash (NULL pointer dereference) to happen. This was changed only incidentally by the large refactor to use fs/crypto/. Solve both problems in a trivial way that can easily be backported: just always take the mutex. It's theoretically less efficient, but it shouldn't be noticeable in practice as the mutex is only acquired very briefly once per encrypted file. Later I'd like to make this use a helper macro like DO_ONCE(). However, DO_ONCE() runs in atomic context, so we'd need to add a new macro that allows blocking. Cc: stable(a)vger.kernel.org # v4.1+ Signed-off-by: Eric Biggers <ebiggers(a)google.com> Signed-off-by: Theodore Ts'o <tytso(a)mit.edu> diff --git a/fs/crypto/crypto.c b/fs/crypto/crypto.c index 608f6bbe0f31..472326737717 100644 --- a/fs/crypto/crypto.c +++ b/fs/crypto/crypto.c @@ -410,11 +410,8 @@ int fscrypt_initialize(unsigned int cop_flags) { int i, res = -ENOMEM; - /* - * No need to allocate a bounce page pool if there already is one or - * this FS won't use it. - */ - if (cop_flags & FS_CFLG_OWN_PAGES || fscrypt_bounce_page_pool) + /* No need to allocate a bounce page pool if this FS won't use it. */ + if (cop_flags & FS_CFLG_OWN_PAGES) return 0; mutex_lock(&fscrypt_init_mutex);

7 years, 9 months

1
0
0 0

[Linux-stable-mirror] FAILED: patch "[PATCH] mm/z3fold.c: use kref to prevent page free/compact race" failed to apply to 4.9-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.9-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 5d03a6613957785e94af7a4a6212ad4af66aa5c2 Mon Sep 17 00:00:00 2001 From: Vitaly Wool <vitalywool(a)gmail.com> Date: Fri, 17 Nov 2017 15:26:16 -0800 Subject: [PATCH] mm/z3fold.c: use kref to prevent page free/compact race There is a race in the current z3fold implementation between do_compact() called in a work queue context and the page release procedure when page's kref goes to 0. do_compact() may be waiting for page lock, which is released by release_z3fold_page_locked right before putting the page onto the "stale" list, and then the page may be freed as do_compact() modifies its contents. The mechanism currently implemented to handle that (checking the PAGE_STALE flag) is not reliable enough. Instead, we'll use page's kref counter to guarantee that the page is not released if its compaction is scheduled. It then becomes compaction function's responsibility to decrease the counter and quit immediately if the page was actually freed. Link: http://lkml.kernel.org/r/20171117092032.00ea56f42affbed19f4fcc6c@gmail.com Signed-off-by: Vitaly Wool <vitaly.wool(a)sonymobile.com> Cc: <Oleksiy.Avramchenko(a)sony.com> Cc: <stable(a)vger.kernel.org> Signed-off-by: Andrew Morton <akpm(a)linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds(a)linux-foundation.org> diff --git a/mm/z3fold.c b/mm/z3fold.c index b2ba2ba585f3..39e19125d6a0 100644 --- a/mm/z3fold.c +++ b/mm/z3fold.c @@ -404,8 +404,7 @@ static void do_compact_page(struct z3fold_header *zhdr, bool locked) WARN_ON(z3fold_page_trylock(zhdr)); else z3fold_page_lock(zhdr); - if (test_bit(PAGE_STALE, &page->private) || - !test_and_clear_bit(NEEDS_COMPACTING, &page->private)) { + if (WARN_ON(!test_and_clear_bit(NEEDS_COMPACTING, &page->private))) { z3fold_page_unlock(zhdr); return; } @@ -413,6 +412,11 @@ static void do_compact_page(struct z3fold_header *zhdr, bool locked) list_del_init(&zhdr->buddy); spin_unlock(&pool->lock); + if (kref_put(&zhdr->refcount, release_z3fold_page_locked)) { + atomic64_dec(&pool->pages_nr); + return; + } + z3fold_compact_page(zhdr); unbuddied = get_cpu_ptr(pool->unbuddied); fchunks = num_free_chunks(zhdr); @@ -753,9 +757,11 @@ static void z3fold_free(struct z3fold_pool *pool, unsigned long handle) list_del_init(&zhdr->buddy); spin_unlock(&pool->lock); zhdr->cpu = -1; + kref_get(&zhdr->refcount); do_compact_page(zhdr, true); return; } + kref_get(&zhdr->refcount); queue_work_on(zhdr->cpu, pool->compact_wq, &zhdr->work); z3fold_page_unlock(zhdr); }

7 years, 9 months

1
0
0 0

[Linux-stable-mirror] FAILED: patch "[PATCH] MIPS: math-emu: Fix final emulation phase for certain" failed to apply to 4.4-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 409fcace9963c1e8d2cb0f7ac62e8b34d47ef979 Mon Sep 17 00:00:00 2001 From: Aleksandar Markovic <aleksandar.markovic(a)mips.com> Date: Thu, 2 Nov 2017 12:13:58 +0100 Subject: [PATCH] MIPS: math-emu: Fix final emulation phase for certain instructions Fix final phase of <CLASS|MADDF|MSUBF|MAX|MIN|MAXA|MINA>.<D|S> emulation. Provide proper generation of SIGFPE signal and updating debugfs FP exception stats in cases of any exception flags set in preceding phases of emulation. CLASS.<D|S> instruction may generate "Unimplemented Operation" FP exception. <MADDF|MSUBF>.<D|S> instructions may generate "Inexact", "Unimplemented Operation", "Invalid Operation", "Overflow", and "Underflow" FP exceptions. <MAX|MIN|MAXA|MINA>.<D|S> instructions can generate "Unimplemented Operation" and "Invalid Operation" FP exceptions. The proper final processing of the cases when any FP exception flag is set is achieved by replacing "break" statement with "goto copcsr" statement. With such solution, this patch brings the final phase of emulation of the above instructions consistent with the one corresponding to the previously implemented emulation of other related FPU instructions (ADD, SUB, etc.). Fixes: 38db37ba069f ("MIPS: math-emu: Add support for the MIPS R6 CLASS FPU instruction") Fixes: e24c3bec3e8e ("MIPS: math-emu: Add support for the MIPS R6 MADDF FPU instruction") Fixes: 83d43305a1df ("MIPS: math-emu: Add support for the MIPS R6 MSUBF FPU instruction") Fixes: a79f5f9ba508 ("MIPS: math-emu: Add support for the MIPS R6 MAX{, A} FPU instruction") Fixes: 4e9561b20e2f ("MIPS: math-emu: Add support for the MIPS R6 MIN{, A} FPU instruction") Signed-off-by: Aleksandar Markovic <aleksandar.markovic(a)mips.com> Cc: Ralf Baechle <ralf(a)linux-mips.org> Cc: Douglas Leung <douglas.leung(a)mips.com> Cc: Goran Ferenc <goran.ferenc(a)mips.com> Cc: "Maciej W. Rozycki" <macro(a)imgtec.com> Cc: Miodrag Dinic <miodrag.dinic(a)mips.com> Cc: Paul Burton <paul.burton(a)mips.com> Cc: Petar Jovanovic <petar.jovanovic(a)mips.com> Cc: Raghu Gandham <raghu.gandham(a)mips.com> Cc: linux-mips(a)linux-mips.org Cc: <stable(a)vger.kernel.org> # 4.3+ Patchwork: https://patchwork.linux-mips.org/patch/17581/ Signed-off-by: James Hogan <jhogan(a)kernel.org> diff --git a/arch/mips/math-emu/cp1emu.c b/arch/mips/math-emu/cp1emu.c index 192542dbd972..d2fcb3084279 100644 --- a/arch/mips/math-emu/cp1emu.c +++ b/arch/mips/math-emu/cp1emu.c @@ -1795,7 +1795,7 @@ static int fpu_emu(struct pt_regs *xcp, struct mips_fpu_struct *ctx, SPFROMREG(fs, MIPSInst_FS(ir)); SPFROMREG(fd, MIPSInst_FD(ir)); rv.s = ieee754sp_maddf(fd, fs, ft); - break; + goto copcsr; } case fmsubf_op: { @@ -1809,7 +1809,7 @@ static int fpu_emu(struct pt_regs *xcp, struct mips_fpu_struct *ctx, SPFROMREG(fs, MIPSInst_FS(ir)); SPFROMREG(fd, MIPSInst_FD(ir)); rv.s = ieee754sp_msubf(fd, fs, ft); - break; + goto copcsr; } case frint_op: { @@ -1834,7 +1834,7 @@ static int fpu_emu(struct pt_regs *xcp, struct mips_fpu_struct *ctx, SPFROMREG(fs, MIPSInst_FS(ir)); rv.w = ieee754sp_2008class(fs); rfmt = w_fmt; - break; + goto copcsr; } case fmin_op: { @@ -1847,7 +1847,7 @@ static int fpu_emu(struct pt_regs *xcp, struct mips_fpu_struct *ctx, SPFROMREG(ft, MIPSInst_FT(ir)); SPFROMREG(fs, MIPSInst_FS(ir)); rv.s = ieee754sp_fmin(fs, ft); - break; + goto copcsr; } case fmina_op: { @@ -1860,7 +1860,7 @@ static int fpu_emu(struct pt_regs *xcp, struct mips_fpu_struct *ctx, SPFROMREG(ft, MIPSInst_FT(ir)); SPFROMREG(fs, MIPSInst_FS(ir)); rv.s = ieee754sp_fmina(fs, ft); - break; + goto copcsr; } case fmax_op: { @@ -1873,7 +1873,7 @@ static int fpu_emu(struct pt_regs *xcp, struct mips_fpu_struct *ctx, SPFROMREG(ft, MIPSInst_FT(ir)); SPFROMREG(fs, MIPSInst_FS(ir)); rv.s = ieee754sp_fmax(fs, ft); - break; + goto copcsr; } case fmaxa_op: { @@ -1886,7 +1886,7 @@ static int fpu_emu(struct pt_regs *xcp, struct mips_fpu_struct *ctx, SPFROMREG(ft, MIPSInst_FT(ir)); SPFROMREG(fs, MIPSInst_FS(ir)); rv.s = ieee754sp_fmaxa(fs, ft); - break; + goto copcsr; } case fabs_op: @@ -2165,7 +2165,7 @@ static int fpu_emu(struct pt_regs *xcp, struct mips_fpu_struct *ctx, DPFROMREG(fs, MIPSInst_FS(ir)); DPFROMREG(fd, MIPSInst_FD(ir)); rv.d = ieee754dp_maddf(fd, fs, ft); - break; + goto copcsr; } case fmsubf_op: { @@ -2179,7 +2179,7 @@ static int fpu_emu(struct pt_regs *xcp, struct mips_fpu_struct *ctx, DPFROMREG(fs, MIPSInst_FS(ir)); DPFROMREG(fd, MIPSInst_FD(ir)); rv.d = ieee754dp_msubf(fd, fs, ft); - break; + goto copcsr; } case frint_op: { @@ -2204,7 +2204,7 @@ static int fpu_emu(struct pt_regs *xcp, struct mips_fpu_struct *ctx, DPFROMREG(fs, MIPSInst_FS(ir)); rv.l = ieee754dp_2008class(fs); rfmt = l_fmt; - break; + goto copcsr; } case fmin_op: { @@ -2217,7 +2217,7 @@ static int fpu_emu(struct pt_regs *xcp, struct mips_fpu_struct *ctx, DPFROMREG(ft, MIPSInst_FT(ir)); DPFROMREG(fs, MIPSInst_FS(ir)); rv.d = ieee754dp_fmin(fs, ft); - break; + goto copcsr; } case fmina_op: { @@ -2230,7 +2230,7 @@ static int fpu_emu(struct pt_regs *xcp, struct mips_fpu_struct *ctx, DPFROMREG(ft, MIPSInst_FT(ir)); DPFROMREG(fs, MIPSInst_FS(ir)); rv.d = ieee754dp_fmina(fs, ft); - break; + goto copcsr; } case fmax_op: { @@ -2243,7 +2243,7 @@ static int fpu_emu(struct pt_regs *xcp, struct mips_fpu_struct *ctx, DPFROMREG(ft, MIPSInst_FT(ir)); DPFROMREG(fs, MIPSInst_FS(ir)); rv.d = ieee754dp_fmax(fs, ft); - break; + goto copcsr; } case fmaxa_op: { @@ -2256,7 +2256,7 @@ static int fpu_emu(struct pt_regs *xcp, struct mips_fpu_struct *ctx, DPFROMREG(ft, MIPSInst_FT(ir)); DPFROMREG(fs, MIPSInst_FS(ir)); rv.d = ieee754dp_fmaxa(fs, ft); - break; + goto copcsr; } case fabs_op:

7 years, 9 months

1
0
0 0

2025

2024

2023

2022

2021

2020

2019

2018

2017

Linux-stable-mirror