July 2023 - Linux-stable-mirror

FAILED: patch "[PATCH] scsi: qla2xxx: Fix task management cmd fail due to" failed to apply to 5.10-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.10-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>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.10.y git checkout FETCH_HEAD git cherry-pick -x 6a87679626b51b53fbb6be417ad8eb083030b617 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2023072134-fiddling-barbecue-b038@gregkh' --subject-prefix 'PATCH 5.10.y' HEAD^.. Possible dependencies: 6a87679626b5 ("scsi: qla2xxx: Fix task management cmd fail due to unavailable resource") 9803fb5d2759 ("scsi: qla2xxx: Fix task management cmd failure") d90171dd0da5 ("scsi: qla2xxx: Multi-que support for TMF") 5f63a163ed2f ("scsi: qla2xxx: Fix exchange oversubscription for management commands") 41e5afe51f75 ("scsi: qla2xxx: Fix exchange oversubscription") 68ad83188d78 ("scsi: qla2xxx: Fix crash when I/O abort times out") 1b80addaae09 ("scsi: qla2xxx: Remove unused declarations for qla2xxx") 63ab6cb582fa ("scsi: qla2xxx: edif: Fix I/O timeout due to over-subscription") 31e6cdbe0eae ("scsi: qla2xxx: Implement ref count for SRB") d4523bd6fd5d ("scsi: qla2xxx: Refactor asynchronous command initialization") 2cabf10dbbe3 ("scsi: qla2xxx: Fix hang on NVMe command timeouts") e3d2612f583b ("scsi: qla2xxx: Fix use after free in debug code") 44d018577f17 ("scsi: qla2xxx: edif: Add encryption to I/O path") 7a09e8d92c6d ("scsi: qla2xxx: edif: Add doorbell notification for app") 9efea843a906 ("scsi: qla2xxx: edif: Add detection of secure device") dd30706e73b7 ("scsi: qla2xxx: edif: Add key update") fac2807946c1 ("scsi: qla2xxx: edif: Add extraction of auth_els from the wire") 84318a9f01ce ("scsi: qla2xxx: edif: Add send, receive, and accept for auth_els") 7878f22a2e03 ("scsi: qla2xxx: edif: Add getfcinfo and statistic bsgs") 7ebb336e45ef ("scsi: qla2xxx: edif: Add start + stop bsgs") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 6a87679626b51b53fbb6be417ad8eb083030b617 Mon Sep 17 00:00:00 2001 From: Quinn Tran <qutran(a)marvell.com> Date: Fri, 28 Apr 2023 00:53:35 -0700 Subject: [PATCH] scsi: qla2xxx: Fix task management cmd fail due to unavailable resource Task management command failed with status 2Ch which is a result of too many task management commands sent to the same target. Hence limit task management commands to 8 per target. Reported-by: kernel test robot <lkp(a)intel.com> Link: https://lore.kernel.org/oe-kbuild-all/202304271952.NKNmoFzv-lkp@intel.com/ Cc: stable(a)vger.kernel.org Signed-off-by: Quinn Tran <qutran(a)marvell.com> Signed-off-by: Nilesh Javali <njavali(a)marvell.com> Link: https://lore.kernel.org/r/20230428075339.32551-4-njavali@marvell.com Reviewed-by: Himanshu Madhani <himanshu.madhani(a)oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen(a)oracle.com> diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h index 02287205ca2e..e345ccbff807 100644 --- a/drivers/scsi/qla2xxx/qla_def.h +++ b/drivers/scsi/qla2xxx/qla_def.h @@ -2542,6 +2542,7 @@ enum rscn_addr_format { typedef struct fc_port { struct list_head list; struct scsi_qla_host *vha; + struct list_head tmf_pending; unsigned int conf_compl_supported:1; unsigned int deleted:2; @@ -2562,6 +2563,8 @@ typedef struct fc_port { unsigned int do_prli_nvme:1; uint8_t nvme_flag; + uint8_t active_tmf; +#define MAX_ACTIVE_TMF 8 uint8_t node_name[WWN_SIZE]; uint8_t port_name[WWN_SIZE]; diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c index bc4600bd5765..84841edcd1b5 100644 --- a/drivers/scsi/qla2xxx/qla_init.c +++ b/drivers/scsi/qla2xxx/qla_init.c @@ -2149,6 +2149,54 @@ __qla2x00_async_tm_cmd(struct tmf_arg *arg) return rval; } +static void qla_put_tmf(fc_port_t *fcport) +{ + struct scsi_qla_host *vha = fcport->vha; + struct qla_hw_data *ha = vha->hw; + unsigned long flags; + + spin_lock_irqsave(&ha->tgt.sess_lock, flags); + fcport->active_tmf--; + spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); +} + +static +int qla_get_tmf(fc_port_t *fcport) +{ + struct scsi_qla_host *vha = fcport->vha; + struct qla_hw_data *ha = vha->hw; + unsigned long flags; + int rc = 0; + LIST_HEAD(tmf_elem); + + spin_lock_irqsave(&ha->tgt.sess_lock, flags); + list_add_tail(&tmf_elem, &fcport->tmf_pending); + + while (fcport->active_tmf >= MAX_ACTIVE_TMF) { + spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); + + msleep(1); + + spin_lock_irqsave(&ha->tgt.sess_lock, flags); + if (fcport->deleted) { + rc = EIO; + break; + } + if (fcport->active_tmf < MAX_ACTIVE_TMF && + list_is_first(&tmf_elem, &fcport->tmf_pending)) + break; + } + + list_del(&tmf_elem); + + if (!rc) + fcport->active_tmf++; + + spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); + + return rc; +} + int qla2x00_async_tm_cmd(fc_port_t *fcport, uint32_t flags, uint64_t lun, uint32_t tag) @@ -2156,18 +2204,19 @@ qla2x00_async_tm_cmd(fc_port_t *fcport, uint32_t flags, uint64_t lun, struct scsi_qla_host *vha = fcport->vha; struct qla_qpair *qpair; struct tmf_arg a; - struct completion comp; int i, rval; - init_completion(&comp); a.vha = fcport->vha; a.fcport = fcport; a.lun = lun; - - if (flags & (TCF_LUN_RESET|TCF_ABORT_TASK_SET|TCF_CLEAR_TASK_SET|TCF_CLEAR_ACA)) + if (flags & (TCF_LUN_RESET|TCF_ABORT_TASK_SET|TCF_CLEAR_TASK_SET|TCF_CLEAR_ACA)) { a.modifier = MK_SYNC_ID_LUN; - else + + if (qla_get_tmf(fcport)) + return QLA_FUNCTION_FAILED; + } else { a.modifier = MK_SYNC_ID; + } if (vha->hw->mqenable) { for (i = 0; i < vha->hw->num_qpairs; i++) { @@ -2186,6 +2235,9 @@ qla2x00_async_tm_cmd(fc_port_t *fcport, uint32_t flags, uint64_t lun, a.flags = flags; rval = __qla2x00_async_tm_cmd(&a); + if (a.modifier == MK_SYNC_ID_LUN) + qla_put_tmf(fcport); + return rval; } @@ -5400,6 +5452,7 @@ qla2x00_alloc_fcport(scsi_qla_host_t *vha, gfp_t flags) INIT_WORK(&fcport->reg_work, qla_register_fcport_fn); INIT_LIST_HEAD(&fcport->gnl_entry); INIT_LIST_HEAD(&fcport->list); + INIT_LIST_HEAD(&fcport->tmf_pending); INIT_LIST_HEAD(&fcport->sess_cmd_list); spin_lock_init(&fcport->sess_cmd_lock);

1 year, 11 months

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FAILED: patch "[PATCH] scsi: qla2xxx: Fix task management cmd fail due to" failed to apply to 5.15-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.15-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>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x 6a87679626b51b53fbb6be417ad8eb083030b617 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2023072133-cartel-depth-3014@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^.. Possible dependencies: 6a87679626b5 ("scsi: qla2xxx: Fix task management cmd fail due to unavailable resource") 9803fb5d2759 ("scsi: qla2xxx: Fix task management cmd failure") d90171dd0da5 ("scsi: qla2xxx: Multi-que support for TMF") 5f63a163ed2f ("scsi: qla2xxx: Fix exchange oversubscription for management commands") 41e5afe51f75 ("scsi: qla2xxx: Fix exchange oversubscription") 68ad83188d78 ("scsi: qla2xxx: Fix crash when I/O abort times out") 1b80addaae09 ("scsi: qla2xxx: Remove unused declarations for qla2xxx") 63ab6cb582fa ("scsi: qla2xxx: edif: Fix I/O timeout due to over-subscription") 31e6cdbe0eae ("scsi: qla2xxx: Implement ref count for SRB") d4523bd6fd5d ("scsi: qla2xxx: Refactor asynchronous command initialization") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 6a87679626b51b53fbb6be417ad8eb083030b617 Mon Sep 17 00:00:00 2001 From: Quinn Tran <qutran(a)marvell.com> Date: Fri, 28 Apr 2023 00:53:35 -0700 Subject: [PATCH] scsi: qla2xxx: Fix task management cmd fail due to unavailable resource Task management command failed with status 2Ch which is a result of too many task management commands sent to the same target. Hence limit task management commands to 8 per target. Reported-by: kernel test robot <lkp(a)intel.com> Link: https://lore.kernel.org/oe-kbuild-all/202304271952.NKNmoFzv-lkp@intel.com/ Cc: stable(a)vger.kernel.org Signed-off-by: Quinn Tran <qutran(a)marvell.com> Signed-off-by: Nilesh Javali <njavali(a)marvell.com> Link: https://lore.kernel.org/r/20230428075339.32551-4-njavali@marvell.com Reviewed-by: Himanshu Madhani <himanshu.madhani(a)oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen(a)oracle.com> diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h index 02287205ca2e..e345ccbff807 100644 --- a/drivers/scsi/qla2xxx/qla_def.h +++ b/drivers/scsi/qla2xxx/qla_def.h @@ -2542,6 +2542,7 @@ enum rscn_addr_format { typedef struct fc_port { struct list_head list; struct scsi_qla_host *vha; + struct list_head tmf_pending; unsigned int conf_compl_supported:1; unsigned int deleted:2; @@ -2562,6 +2563,8 @@ typedef struct fc_port { unsigned int do_prli_nvme:1; uint8_t nvme_flag; + uint8_t active_tmf; +#define MAX_ACTIVE_TMF 8 uint8_t node_name[WWN_SIZE]; uint8_t port_name[WWN_SIZE]; diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c index bc4600bd5765..84841edcd1b5 100644 --- a/drivers/scsi/qla2xxx/qla_init.c +++ b/drivers/scsi/qla2xxx/qla_init.c @@ -2149,6 +2149,54 @@ __qla2x00_async_tm_cmd(struct tmf_arg *arg) return rval; } +static void qla_put_tmf(fc_port_t *fcport) +{ + struct scsi_qla_host *vha = fcport->vha; + struct qla_hw_data *ha = vha->hw; + unsigned long flags; + + spin_lock_irqsave(&ha->tgt.sess_lock, flags); + fcport->active_tmf--; + spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); +} + +static +int qla_get_tmf(fc_port_t *fcport) +{ + struct scsi_qla_host *vha = fcport->vha; + struct qla_hw_data *ha = vha->hw; + unsigned long flags; + int rc = 0; + LIST_HEAD(tmf_elem); + + spin_lock_irqsave(&ha->tgt.sess_lock, flags); + list_add_tail(&tmf_elem, &fcport->tmf_pending); + + while (fcport->active_tmf >= MAX_ACTIVE_TMF) { + spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); + + msleep(1); + + spin_lock_irqsave(&ha->tgt.sess_lock, flags); + if (fcport->deleted) { + rc = EIO; + break; + } + if (fcport->active_tmf < MAX_ACTIVE_TMF && + list_is_first(&tmf_elem, &fcport->tmf_pending)) + break; + } + + list_del(&tmf_elem); + + if (!rc) + fcport->active_tmf++; + + spin_unlock_irqrestore(&ha->tgt.sess_lock, flags); + + return rc; +} + int qla2x00_async_tm_cmd(fc_port_t *fcport, uint32_t flags, uint64_t lun, uint32_t tag) @@ -2156,18 +2204,19 @@ qla2x00_async_tm_cmd(fc_port_t *fcport, uint32_t flags, uint64_t lun, struct scsi_qla_host *vha = fcport->vha; struct qla_qpair *qpair; struct tmf_arg a; - struct completion comp; int i, rval; - init_completion(&comp); a.vha = fcport->vha; a.fcport = fcport; a.lun = lun; - - if (flags & (TCF_LUN_RESET|TCF_ABORT_TASK_SET|TCF_CLEAR_TASK_SET|TCF_CLEAR_ACA)) + if (flags & (TCF_LUN_RESET|TCF_ABORT_TASK_SET|TCF_CLEAR_TASK_SET|TCF_CLEAR_ACA)) { a.modifier = MK_SYNC_ID_LUN; - else + + if (qla_get_tmf(fcport)) + return QLA_FUNCTION_FAILED; + } else { a.modifier = MK_SYNC_ID; + } if (vha->hw->mqenable) { for (i = 0; i < vha->hw->num_qpairs; i++) { @@ -2186,6 +2235,9 @@ qla2x00_async_tm_cmd(fc_port_t *fcport, uint32_t flags, uint64_t lun, a.flags = flags; rval = __qla2x00_async_tm_cmd(&a); + if (a.modifier == MK_SYNC_ID_LUN) + qla_put_tmf(fcport); + return rval; } @@ -5400,6 +5452,7 @@ qla2x00_alloc_fcport(scsi_qla_host_t *vha, gfp_t flags) INIT_WORK(&fcport->reg_work, qla_register_fcport_fn); INIT_LIST_HEAD(&fcport->gnl_entry); INIT_LIST_HEAD(&fcport->list); + INIT_LIST_HEAD(&fcport->tmf_pending); INIT_LIST_HEAD(&fcport->sess_cmd_list); spin_lock_init(&fcport->sess_cmd_lock);

1 year, 11 months

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FAILED: patch "[PATCH] tracing/probes: Fix to record 0-length data_loc in" failed to apply to 5.4-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.4-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>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.4.y git checkout FETCH_HEAD git cherry-pick -x 797311bce5c2ac90b8d65e357603cfd410d36ebb # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2023072106-theme-headache-d3ba@gregkh' --subject-prefix 'PATCH 5.4.y' HEAD^.. Possible dependencies: 797311bce5c2 ("tracing/probes: Fix to record 0-length data_loc in fetch_store_string*() if fails") 4ed8f337dee3 ("Revert "tracing: Add "(fault)" name injection to kernel probes"") e38e2c6a9efc ("tracing/probes: Fix to update dynamic data counter if fetcharg uses it") 00cf3d672a9d ("tracing: Allow synthetic events to pass around stacktraces") f1d3cbfaafc1 ("tracing: Move duplicate code of trace_kprobe/eprobe.c into header") 7491e2c44278 ("tracing: Add a probe that attaches to trace events") 8565a45d0858 ("tracing/probes: Have process_fetch_insn() take a void * instead of pt_regs") 007517a01995 ("tracing/probe: Change traceprobe_set_print_fmt() to take a type") 3b13911a2fd0 ("tracing: Synthetic event field_pos is an index not a boolean") bc87cf0a08d4 ("trace: Add a generic function to read/write u64 values from tracefs") d262271d0483 ("tracing/dynevent: Delegate parsing to create function") d4d704637d93 ("tracing: Add synthetic event error logging") 9bbb33291f8e ("tracing: Check that the synthetic event and field names are legal") 42d120e2dda5 ("tracing: Move is_good_name() from trace_probe.h to trace.h") 8db4d6bfbbf9 ("tracing: Change synthetic event string format to limit printed length") bd82631d7ccd ("tracing: Add support for dynamic strings to synthetic events") 8fbeb52a598c ("tracing: Fix parse_synth_field() error handling") 8b6ddd10d678 ("Merge tag 'trace-v5.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 797311bce5c2ac90b8d65e357603cfd410d36ebb Mon Sep 17 00:00:00 2001 From: "Masami Hiramatsu (Google)" <mhiramat(a)kernel.org> Date: Tue, 11 Jul 2023 23:16:07 +0900 Subject: [PATCH] tracing/probes: Fix to record 0-length data_loc in fetch_store_string*() if fails Fix to record 0-length data to data_loc in fetch_store_string*() if it fails to get the string data. Currently those expect that the data_loc is updated by store_trace_args() if it returns the error code. However, that does not work correctly if the argument is an array of strings. In that case, store_trace_args() only clears the first entry of the array (which may have no error) and leaves other entries. So it should be cleared by fetch_store_string*() itself. Also, 'dyndata' and 'maxlen' in store_trace_args() should be updated only if it is used (ret > 0 and argument is a dynamic data.) Link: https://lore.kernel.org/all/168908496683.123124.4761206188794205601.stgit@d… Fixes: 40b53b771806 ("tracing: probeevent: Add array type support") Cc: stable(a)vger.kernel.org Reviewed-by: Steven Rostedt (Google) <rostedt(a)goodmis.org> Signed-off-by: Masami Hiramatsu (Google) <mhiramat(a)kernel.org> diff --git a/kernel/trace/trace_probe_kernel.h b/kernel/trace/trace_probe_kernel.h index 6deae2ce34f8..bb723eefd7b7 100644 --- a/kernel/trace/trace_probe_kernel.h +++ b/kernel/trace/trace_probe_kernel.h @@ -37,6 +37,13 @@ fetch_store_strlen(unsigned long addr) return (ret < 0) ? ret : len; } +static nokprobe_inline void set_data_loc(int ret, void *dest, void *__dest, void *base) +{ + if (ret < 0) + ret = 0; + *(u32 *)dest = make_data_loc(ret, __dest - base); +} + /* * Fetch a null-terminated string from user. Caller MUST set *(u32 *)buf * with max length and relative data location. @@ -55,8 +62,7 @@ fetch_store_string_user(unsigned long addr, void *dest, void *base) __dest = get_loc_data(dest, base); ret = strncpy_from_user_nofault(__dest, uaddr, maxlen); - if (ret >= 0) - *(u32 *)dest = make_data_loc(ret, __dest - base); + set_data_loc(ret, dest, __dest, base); return ret; } @@ -87,8 +93,7 @@ fetch_store_string(unsigned long addr, void *dest, void *base) * probing. */ ret = strncpy_from_kernel_nofault(__dest, (void *)addr, maxlen); - if (ret >= 0) - *(u32 *)dest = make_data_loc(ret, __dest - base); + set_data_loc(ret, dest, __dest, base); return ret; } diff --git a/kernel/trace/trace_probe_tmpl.h b/kernel/trace/trace_probe_tmpl.h index 185da001f4c3..3935b347f874 100644 --- a/kernel/trace/trace_probe_tmpl.h +++ b/kernel/trace/trace_probe_tmpl.h @@ -267,13 +267,9 @@ store_trace_args(void *data, struct trace_probe *tp, void *rec, if (unlikely(arg->dynamic)) *dl = make_data_loc(maxlen, dyndata - base); ret = process_fetch_insn(arg->code, rec, dl, base); - if (arg->dynamic) { - if (unlikely(ret < 0)) { - *dl = make_data_loc(0, dyndata - base); - } else { - dyndata += ret; - maxlen -= ret; - } + if (arg->dynamic && likely(ret > 0)) { + dyndata += ret; + maxlen -= ret; } } } diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c index 8b92e34ff0c8..7b47e9a2c010 100644 --- a/kernel/trace/trace_uprobe.c +++ b/kernel/trace/trace_uprobe.c @@ -170,7 +170,8 @@ fetch_store_string(unsigned long addr, void *dest, void *base) */ ret++; *(u32 *)dest = make_data_loc(ret, (void *)dst - base); - } + } else + *(u32 *)dest = make_data_loc(0, (void *)dst - base); return ret; }

1 year, 11 months

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FAILED: patch "[PATCH] tracing/probes: Fix to record 0-length data_loc in" failed to apply to 5.10-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.10-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>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.10.y git checkout FETCH_HEAD git cherry-pick -x 797311bce5c2ac90b8d65e357603cfd410d36ebb # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2023072105-drop-down-yearling-a66f@gregkh' --subject-prefix 'PATCH 5.10.y' HEAD^.. Possible dependencies: 797311bce5c2 ("tracing/probes: Fix to record 0-length data_loc in fetch_store_string*() if fails") 4ed8f337dee3 ("Revert "tracing: Add "(fault)" name injection to kernel probes"") e38e2c6a9efc ("tracing/probes: Fix to update dynamic data counter if fetcharg uses it") 00cf3d672a9d ("tracing: Allow synthetic events to pass around stacktraces") f1d3cbfaafc1 ("tracing: Move duplicate code of trace_kprobe/eprobe.c into header") 7491e2c44278 ("tracing: Add a probe that attaches to trace events") 8565a45d0858 ("tracing/probes: Have process_fetch_insn() take a void * instead of pt_regs") 007517a01995 ("tracing/probe: Change traceprobe_set_print_fmt() to take a type") 3b13911a2fd0 ("tracing: Synthetic event field_pos is an index not a boolean") bc87cf0a08d4 ("trace: Add a generic function to read/write u64 values from tracefs") d262271d0483 ("tracing/dynevent: Delegate parsing to create function") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 797311bce5c2ac90b8d65e357603cfd410d36ebb Mon Sep 17 00:00:00 2001 From: "Masami Hiramatsu (Google)" <mhiramat(a)kernel.org> Date: Tue, 11 Jul 2023 23:16:07 +0900 Subject: [PATCH] tracing/probes: Fix to record 0-length data_loc in fetch_store_string*() if fails Fix to record 0-length data to data_loc in fetch_store_string*() if it fails to get the string data. Currently those expect that the data_loc is updated by store_trace_args() if it returns the error code. However, that does not work correctly if the argument is an array of strings. In that case, store_trace_args() only clears the first entry of the array (which may have no error) and leaves other entries. So it should be cleared by fetch_store_string*() itself. Also, 'dyndata' and 'maxlen' in store_trace_args() should be updated only if it is used (ret > 0 and argument is a dynamic data.) Link: https://lore.kernel.org/all/168908496683.123124.4761206188794205601.stgit@d… Fixes: 40b53b771806 ("tracing: probeevent: Add array type support") Cc: stable(a)vger.kernel.org Reviewed-by: Steven Rostedt (Google) <rostedt(a)goodmis.org> Signed-off-by: Masami Hiramatsu (Google) <mhiramat(a)kernel.org> diff --git a/kernel/trace/trace_probe_kernel.h b/kernel/trace/trace_probe_kernel.h index 6deae2ce34f8..bb723eefd7b7 100644 --- a/kernel/trace/trace_probe_kernel.h +++ b/kernel/trace/trace_probe_kernel.h @@ -37,6 +37,13 @@ fetch_store_strlen(unsigned long addr) return (ret < 0) ? ret : len; } +static nokprobe_inline void set_data_loc(int ret, void *dest, void *__dest, void *base) +{ + if (ret < 0) + ret = 0; + *(u32 *)dest = make_data_loc(ret, __dest - base); +} + /* * Fetch a null-terminated string from user. Caller MUST set *(u32 *)buf * with max length and relative data location. @@ -55,8 +62,7 @@ fetch_store_string_user(unsigned long addr, void *dest, void *base) __dest = get_loc_data(dest, base); ret = strncpy_from_user_nofault(__dest, uaddr, maxlen); - if (ret >= 0) - *(u32 *)dest = make_data_loc(ret, __dest - base); + set_data_loc(ret, dest, __dest, base); return ret; } @@ -87,8 +93,7 @@ fetch_store_string(unsigned long addr, void *dest, void *base) * probing. */ ret = strncpy_from_kernel_nofault(__dest, (void *)addr, maxlen); - if (ret >= 0) - *(u32 *)dest = make_data_loc(ret, __dest - base); + set_data_loc(ret, dest, __dest, base); return ret; } diff --git a/kernel/trace/trace_probe_tmpl.h b/kernel/trace/trace_probe_tmpl.h index 185da001f4c3..3935b347f874 100644 --- a/kernel/trace/trace_probe_tmpl.h +++ b/kernel/trace/trace_probe_tmpl.h @@ -267,13 +267,9 @@ store_trace_args(void *data, struct trace_probe *tp, void *rec, if (unlikely(arg->dynamic)) *dl = make_data_loc(maxlen, dyndata - base); ret = process_fetch_insn(arg->code, rec, dl, base); - if (arg->dynamic) { - if (unlikely(ret < 0)) { - *dl = make_data_loc(0, dyndata - base); - } else { - dyndata += ret; - maxlen -= ret; - } + if (arg->dynamic && likely(ret > 0)) { + dyndata += ret; + maxlen -= ret; } } } diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c index 8b92e34ff0c8..7b47e9a2c010 100644 --- a/kernel/trace/trace_uprobe.c +++ b/kernel/trace/trace_uprobe.c @@ -170,7 +170,8 @@ fetch_store_string(unsigned long addr, void *dest, void *base) */ ret++; *(u32 *)dest = make_data_loc(ret, (void *)dst - base); - } + } else + *(u32 *)dest = make_data_loc(0, (void *)dst - base); return ret; }

1 year, 11 months

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FAILED: patch "[PATCH] tracing/probes: Fix to record 0-length data_loc in" failed to apply to 5.15-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.15-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>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x 797311bce5c2ac90b8d65e357603cfd410d36ebb # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2023072104-epilepsy-remedial-bdd8@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^.. Possible dependencies: 797311bce5c2 ("tracing/probes: Fix to record 0-length data_loc in fetch_store_string*() if fails") 4ed8f337dee3 ("Revert "tracing: Add "(fault)" name injection to kernel probes"") e38e2c6a9efc ("tracing/probes: Fix to update dynamic data counter if fetcharg uses it") 00cf3d672a9d ("tracing: Allow synthetic events to pass around stacktraces") f1d3cbfaafc1 ("tracing: Move duplicate code of trace_kprobe/eprobe.c into header") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 797311bce5c2ac90b8d65e357603cfd410d36ebb Mon Sep 17 00:00:00 2001 From: "Masami Hiramatsu (Google)" <mhiramat(a)kernel.org> Date: Tue, 11 Jul 2023 23:16:07 +0900 Subject: [PATCH] tracing/probes: Fix to record 0-length data_loc in fetch_store_string*() if fails Fix to record 0-length data to data_loc in fetch_store_string*() if it fails to get the string data. Currently those expect that the data_loc is updated by store_trace_args() if it returns the error code. However, that does not work correctly if the argument is an array of strings. In that case, store_trace_args() only clears the first entry of the array (which may have no error) and leaves other entries. So it should be cleared by fetch_store_string*() itself. Also, 'dyndata' and 'maxlen' in store_trace_args() should be updated only if it is used (ret > 0 and argument is a dynamic data.) Link: https://lore.kernel.org/all/168908496683.123124.4761206188794205601.stgit@d… Fixes: 40b53b771806 ("tracing: probeevent: Add array type support") Cc: stable(a)vger.kernel.org Reviewed-by: Steven Rostedt (Google) <rostedt(a)goodmis.org> Signed-off-by: Masami Hiramatsu (Google) <mhiramat(a)kernel.org> diff --git a/kernel/trace/trace_probe_kernel.h b/kernel/trace/trace_probe_kernel.h index 6deae2ce34f8..bb723eefd7b7 100644 --- a/kernel/trace/trace_probe_kernel.h +++ b/kernel/trace/trace_probe_kernel.h @@ -37,6 +37,13 @@ fetch_store_strlen(unsigned long addr) return (ret < 0) ? ret : len; } +static nokprobe_inline void set_data_loc(int ret, void *dest, void *__dest, void *base) +{ + if (ret < 0) + ret = 0; + *(u32 *)dest = make_data_loc(ret, __dest - base); +} + /* * Fetch a null-terminated string from user. Caller MUST set *(u32 *)buf * with max length and relative data location. @@ -55,8 +62,7 @@ fetch_store_string_user(unsigned long addr, void *dest, void *base) __dest = get_loc_data(dest, base); ret = strncpy_from_user_nofault(__dest, uaddr, maxlen); - if (ret >= 0) - *(u32 *)dest = make_data_loc(ret, __dest - base); + set_data_loc(ret, dest, __dest, base); return ret; } @@ -87,8 +93,7 @@ fetch_store_string(unsigned long addr, void *dest, void *base) * probing. */ ret = strncpy_from_kernel_nofault(__dest, (void *)addr, maxlen); - if (ret >= 0) - *(u32 *)dest = make_data_loc(ret, __dest - base); + set_data_loc(ret, dest, __dest, base); return ret; } diff --git a/kernel/trace/trace_probe_tmpl.h b/kernel/trace/trace_probe_tmpl.h index 185da001f4c3..3935b347f874 100644 --- a/kernel/trace/trace_probe_tmpl.h +++ b/kernel/trace/trace_probe_tmpl.h @@ -267,13 +267,9 @@ store_trace_args(void *data, struct trace_probe *tp, void *rec, if (unlikely(arg->dynamic)) *dl = make_data_loc(maxlen, dyndata - base); ret = process_fetch_insn(arg->code, rec, dl, base); - if (arg->dynamic) { - if (unlikely(ret < 0)) { - *dl = make_data_loc(0, dyndata - base); - } else { - dyndata += ret; - maxlen -= ret; - } + if (arg->dynamic && likely(ret > 0)) { + dyndata += ret; + maxlen -= ret; } } } diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c index 8b92e34ff0c8..7b47e9a2c010 100644 --- a/kernel/trace/trace_uprobe.c +++ b/kernel/trace/trace_uprobe.c @@ -170,7 +170,8 @@ fetch_store_string(unsigned long addr, void *dest, void *base) */ ret++; *(u32 *)dest = make_data_loc(ret, (void *)dst - base); - } + } else + *(u32 *)dest = make_data_loc(0, (void *)dst - base); return ret; }

1 year, 11 months

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FAILED: patch "[PATCH] tracing/probes: Fix to record 0-length data_loc in" failed to apply to 6.1-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.1-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>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.1.y git checkout FETCH_HEAD git cherry-pick -x 797311bce5c2ac90b8d65e357603cfd410d36ebb # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2023072103-huff-flyable-0350@gregkh' --subject-prefix 'PATCH 6.1.y' HEAD^.. Possible dependencies: 797311bce5c2 ("tracing/probes: Fix to record 0-length data_loc in fetch_store_string*() if fails") 4ed8f337dee3 ("Revert "tracing: Add "(fault)" name injection to kernel probes"") e38e2c6a9efc ("tracing/probes: Fix to update dynamic data counter if fetcharg uses it") 00cf3d672a9d ("tracing: Allow synthetic events to pass around stacktraces") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 797311bce5c2ac90b8d65e357603cfd410d36ebb Mon Sep 17 00:00:00 2001 From: "Masami Hiramatsu (Google)" <mhiramat(a)kernel.org> Date: Tue, 11 Jul 2023 23:16:07 +0900 Subject: [PATCH] tracing/probes: Fix to record 0-length data_loc in fetch_store_string*() if fails Fix to record 0-length data to data_loc in fetch_store_string*() if it fails to get the string data. Currently those expect that the data_loc is updated by store_trace_args() if it returns the error code. However, that does not work correctly if the argument is an array of strings. In that case, store_trace_args() only clears the first entry of the array (which may have no error) and leaves other entries. So it should be cleared by fetch_store_string*() itself. Also, 'dyndata' and 'maxlen' in store_trace_args() should be updated only if it is used (ret > 0 and argument is a dynamic data.) Link: https://lore.kernel.org/all/168908496683.123124.4761206188794205601.stgit@d… Fixes: 40b53b771806 ("tracing: probeevent: Add array type support") Cc: stable(a)vger.kernel.org Reviewed-by: Steven Rostedt (Google) <rostedt(a)goodmis.org> Signed-off-by: Masami Hiramatsu (Google) <mhiramat(a)kernel.org> diff --git a/kernel/trace/trace_probe_kernel.h b/kernel/trace/trace_probe_kernel.h index 6deae2ce34f8..bb723eefd7b7 100644 --- a/kernel/trace/trace_probe_kernel.h +++ b/kernel/trace/trace_probe_kernel.h @@ -37,6 +37,13 @@ fetch_store_strlen(unsigned long addr) return (ret < 0) ? ret : len; } +static nokprobe_inline void set_data_loc(int ret, void *dest, void *__dest, void *base) +{ + if (ret < 0) + ret = 0; + *(u32 *)dest = make_data_loc(ret, __dest - base); +} + /* * Fetch a null-terminated string from user. Caller MUST set *(u32 *)buf * with max length and relative data location. @@ -55,8 +62,7 @@ fetch_store_string_user(unsigned long addr, void *dest, void *base) __dest = get_loc_data(dest, base); ret = strncpy_from_user_nofault(__dest, uaddr, maxlen); - if (ret >= 0) - *(u32 *)dest = make_data_loc(ret, __dest - base); + set_data_loc(ret, dest, __dest, base); return ret; } @@ -87,8 +93,7 @@ fetch_store_string(unsigned long addr, void *dest, void *base) * probing. */ ret = strncpy_from_kernel_nofault(__dest, (void *)addr, maxlen); - if (ret >= 0) - *(u32 *)dest = make_data_loc(ret, __dest - base); + set_data_loc(ret, dest, __dest, base); return ret; } diff --git a/kernel/trace/trace_probe_tmpl.h b/kernel/trace/trace_probe_tmpl.h index 185da001f4c3..3935b347f874 100644 --- a/kernel/trace/trace_probe_tmpl.h +++ b/kernel/trace/trace_probe_tmpl.h @@ -267,13 +267,9 @@ store_trace_args(void *data, struct trace_probe *tp, void *rec, if (unlikely(arg->dynamic)) *dl = make_data_loc(maxlen, dyndata - base); ret = process_fetch_insn(arg->code, rec, dl, base); - if (arg->dynamic) { - if (unlikely(ret < 0)) { - *dl = make_data_loc(0, dyndata - base); - } else { - dyndata += ret; - maxlen -= ret; - } + if (arg->dynamic && likely(ret > 0)) { + dyndata += ret; + maxlen -= ret; } } } diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c index 8b92e34ff0c8..7b47e9a2c010 100644 --- a/kernel/trace/trace_uprobe.c +++ b/kernel/trace/trace_uprobe.c @@ -170,7 +170,8 @@ fetch_store_string(unsigned long addr, void *dest, void *base) */ ret++; *(u32 *)dest = make_data_loc(ret, (void *)dst - base); - } + } else + *(u32 *)dest = make_data_loc(0, (void *)dst - base); return ret; }

1 year, 11 months

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FAILED: patch "[PATCH] Revert "tracing: Add "(fault)" name injection to kernel" failed to apply to 5.15-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.15-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>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x 4ed8f337dee32df71435689c19d22e4ee846e15a # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2023072147-whiny-untapped-a860@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^.. Possible dependencies: 4ed8f337dee3 ("Revert "tracing: Add "(fault)" name injection to kernel probes"") 00cf3d672a9d ("tracing: Allow synthetic events to pass around stacktraces") f1d3cbfaafc1 ("tracing: Move duplicate code of trace_kprobe/eprobe.c into header") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 4ed8f337dee32df71435689c19d22e4ee846e15a Mon Sep 17 00:00:00 2001 From: "Masami Hiramatsu (Google)" <mhiramat(a)kernel.org> Date: Tue, 11 Jul 2023 23:15:57 +0900 Subject: [PATCH] Revert "tracing: Add "(fault)" name injection to kernel probes" This reverts commit 2e9906f84fc7c99388bb7123ade167250d50f1c0. It was turned out that commit 2e9906f84fc7 ("tracing: Add "(fault)" name injection to kernel probes") did not work correctly and probe events still show just '(fault)' (instead of '"(fault)"'). Also, current '(fault)' is more explicit that it faulted. This also moves FAULT_STRING macro to trace.h so that synthetic event can keep using it, and uses it in trace_probe.c too. Link: https://lore.kernel.org/all/168908495772.123124.1250788051922100079.stgit@d… Link: https://lore.kernel.org/all/20230706230642.3793a593@rorschach.local.home/ Cc: stable(a)vger.kernel.org Cc: Andrew Morton <akpm(a)linux-foundation.org> Cc: Tom Zanussi <zanussi(a)kernel.org> Signed-off-by: Masami Hiramatsu (Google) <mhiramat(a)kernel.org> Reviewed-by: Steven Rostedt (Google) <rostedt(a)goodmis.org> diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index 79bdefe9261b..eee1f3ca4749 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -113,6 +113,8 @@ enum trace_type { #define MEM_FAIL(condition, fmt, ...) \ DO_ONCE_LITE_IF(condition, pr_err, "ERROR: " fmt, ##__VA_ARGS__) +#define FAULT_STRING "(fault)" + #define HIST_STACKTRACE_DEPTH 16 #define HIST_STACKTRACE_SIZE (HIST_STACKTRACE_DEPTH * sizeof(unsigned long)) #define HIST_STACKTRACE_SKIP 5 diff --git a/kernel/trace/trace_probe.c b/kernel/trace/trace_probe.c index 2d2616678295..591399ddcee5 100644 --- a/kernel/trace/trace_probe.c +++ b/kernel/trace/trace_probe.c @@ -65,7 +65,7 @@ int PRINT_TYPE_FUNC_NAME(string)(struct trace_seq *s, void *data, void *ent) int len = *(u32 *)data >> 16; if (!len) - trace_seq_puts(s, "(fault)"); + trace_seq_puts(s, FAULT_STRING); else trace_seq_printf(s, "\"%s\"", (const char *)get_loc_data(data, ent)); diff --git a/kernel/trace/trace_probe_kernel.h b/kernel/trace/trace_probe_kernel.h index c4e1d4c03a85..6deae2ce34f8 100644 --- a/kernel/trace/trace_probe_kernel.h +++ b/kernel/trace/trace_probe_kernel.h @@ -2,8 +2,6 @@ #ifndef __TRACE_PROBE_KERNEL_H_ #define __TRACE_PROBE_KERNEL_H_ -#define FAULT_STRING "(fault)" - /* * This depends on trace_probe.h, but can not include it due to * the way trace_probe_tmpl.h is used by trace_kprobe.c and trace_eprobe.c. @@ -15,16 +13,8 @@ static nokprobe_inline int fetch_store_strlen_user(unsigned long addr) { const void __user *uaddr = (__force const void __user *)addr; - int ret; - ret = strnlen_user_nofault(uaddr, MAX_STRING_SIZE); - /* - * strnlen_user_nofault returns zero on fault, insert the - * FAULT_STRING when that occurs. - */ - if (ret <= 0) - return strlen(FAULT_STRING) + 1; - return ret; + return strnlen_user_nofault(uaddr, MAX_STRING_SIZE); } /* Return the length of string -- including null terminal byte */ @@ -44,18 +34,7 @@ fetch_store_strlen(unsigned long addr) len++; } while (c && ret == 0 && len < MAX_STRING_SIZE); - /* For faults, return enough to hold the FAULT_STRING */ - return (ret < 0) ? strlen(FAULT_STRING) + 1 : len; -} - -static nokprobe_inline void set_data_loc(int ret, void *dest, void *__dest, void *base, int len) -{ - if (ret >= 0) { - *(u32 *)dest = make_data_loc(ret, __dest - base); - } else { - strscpy(__dest, FAULT_STRING, len); - ret = strlen(__dest) + 1; - } + return (ret < 0) ? ret : len; } /* @@ -76,7 +55,8 @@ fetch_store_string_user(unsigned long addr, void *dest, void *base) __dest = get_loc_data(dest, base); ret = strncpy_from_user_nofault(__dest, uaddr, maxlen); - set_data_loc(ret, dest, __dest, base, maxlen); + if (ret >= 0) + *(u32 *)dest = make_data_loc(ret, __dest - base); return ret; } @@ -107,7 +87,8 @@ fetch_store_string(unsigned long addr, void *dest, void *base) * probing. */ ret = strncpy_from_kernel_nofault(__dest, (void *)addr, maxlen); - set_data_loc(ret, dest, __dest, base, maxlen); + if (ret >= 0) + *(u32 *)dest = make_data_loc(ret, __dest - base); return ret; }

1 year, 11 months

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FAILED: patch "[PATCH] Revert "tracing: Add "(fault)" name injection to kernel" failed to apply to 6.1-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.1-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>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.1.y git checkout FETCH_HEAD git cherry-pick -x 4ed8f337dee32df71435689c19d22e4ee846e15a # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2023072146-thus-data-323d@gregkh' --subject-prefix 'PATCH 6.1.y' HEAD^.. Possible dependencies: 4ed8f337dee3 ("Revert "tracing: Add "(fault)" name injection to kernel probes"") 00cf3d672a9d ("tracing: Allow synthetic events to pass around stacktraces") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 4ed8f337dee32df71435689c19d22e4ee846e15a Mon Sep 17 00:00:00 2001 From: "Masami Hiramatsu (Google)" <mhiramat(a)kernel.org> Date: Tue, 11 Jul 2023 23:15:57 +0900 Subject: [PATCH] Revert "tracing: Add "(fault)" name injection to kernel probes" This reverts commit 2e9906f84fc7c99388bb7123ade167250d50f1c0. It was turned out that commit 2e9906f84fc7 ("tracing: Add "(fault)" name injection to kernel probes") did not work correctly and probe events still show just '(fault)' (instead of '"(fault)"'). Also, current '(fault)' is more explicit that it faulted. This also moves FAULT_STRING macro to trace.h so that synthetic event can keep using it, and uses it in trace_probe.c too. Link: https://lore.kernel.org/all/168908495772.123124.1250788051922100079.stgit@d… Link: https://lore.kernel.org/all/20230706230642.3793a593@rorschach.local.home/ Cc: stable(a)vger.kernel.org Cc: Andrew Morton <akpm(a)linux-foundation.org> Cc: Tom Zanussi <zanussi(a)kernel.org> Signed-off-by: Masami Hiramatsu (Google) <mhiramat(a)kernel.org> Reviewed-by: Steven Rostedt (Google) <rostedt(a)goodmis.org> diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index 79bdefe9261b..eee1f3ca4749 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -113,6 +113,8 @@ enum trace_type { #define MEM_FAIL(condition, fmt, ...) \ DO_ONCE_LITE_IF(condition, pr_err, "ERROR: " fmt, ##__VA_ARGS__) +#define FAULT_STRING "(fault)" + #define HIST_STACKTRACE_DEPTH 16 #define HIST_STACKTRACE_SIZE (HIST_STACKTRACE_DEPTH * sizeof(unsigned long)) #define HIST_STACKTRACE_SKIP 5 diff --git a/kernel/trace/trace_probe.c b/kernel/trace/trace_probe.c index 2d2616678295..591399ddcee5 100644 --- a/kernel/trace/trace_probe.c +++ b/kernel/trace/trace_probe.c @@ -65,7 +65,7 @@ int PRINT_TYPE_FUNC_NAME(string)(struct trace_seq *s, void *data, void *ent) int len = *(u32 *)data >> 16; if (!len) - trace_seq_puts(s, "(fault)"); + trace_seq_puts(s, FAULT_STRING); else trace_seq_printf(s, "\"%s\"", (const char *)get_loc_data(data, ent)); diff --git a/kernel/trace/trace_probe_kernel.h b/kernel/trace/trace_probe_kernel.h index c4e1d4c03a85..6deae2ce34f8 100644 --- a/kernel/trace/trace_probe_kernel.h +++ b/kernel/trace/trace_probe_kernel.h @@ -2,8 +2,6 @@ #ifndef __TRACE_PROBE_KERNEL_H_ #define __TRACE_PROBE_KERNEL_H_ -#define FAULT_STRING "(fault)" - /* * This depends on trace_probe.h, but can not include it due to * the way trace_probe_tmpl.h is used by trace_kprobe.c and trace_eprobe.c. @@ -15,16 +13,8 @@ static nokprobe_inline int fetch_store_strlen_user(unsigned long addr) { const void __user *uaddr = (__force const void __user *)addr; - int ret; - ret = strnlen_user_nofault(uaddr, MAX_STRING_SIZE); - /* - * strnlen_user_nofault returns zero on fault, insert the - * FAULT_STRING when that occurs. - */ - if (ret <= 0) - return strlen(FAULT_STRING) + 1; - return ret; + return strnlen_user_nofault(uaddr, MAX_STRING_SIZE); } /* Return the length of string -- including null terminal byte */ @@ -44,18 +34,7 @@ fetch_store_strlen(unsigned long addr) len++; } while (c && ret == 0 && len < MAX_STRING_SIZE); - /* For faults, return enough to hold the FAULT_STRING */ - return (ret < 0) ? strlen(FAULT_STRING) + 1 : len; -} - -static nokprobe_inline void set_data_loc(int ret, void *dest, void *__dest, void *base, int len) -{ - if (ret >= 0) { - *(u32 *)dest = make_data_loc(ret, __dest - base); - } else { - strscpy(__dest, FAULT_STRING, len); - ret = strlen(__dest) + 1; - } + return (ret < 0) ? ret : len; } /* @@ -76,7 +55,8 @@ fetch_store_string_user(unsigned long addr, void *dest, void *base) __dest = get_loc_data(dest, base); ret = strncpy_from_user_nofault(__dest, uaddr, maxlen); - set_data_loc(ret, dest, __dest, base, maxlen); + if (ret >= 0) + *(u32 *)dest = make_data_loc(ret, __dest - base); return ret; } @@ -107,7 +87,8 @@ fetch_store_string(unsigned long addr, void *dest, void *base) * probing. */ ret = strncpy_from_kernel_nofault(__dest, (void *)addr, maxlen); - set_data_loc(ret, dest, __dest, base, maxlen); + if (ret >= 0) + *(u32 *)dest = make_data_loc(ret, __dest - base); return ret; }

1 year, 11 months

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FAILED: patch "[PATCH] tracing/probes: Fix to update dynamic data counter if" failed to apply to 5.4-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.4-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>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.4.y git checkout FETCH_HEAD git cherry-pick -x e38e2c6a9efc435f9de344b7c91f7697e01b47d5 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2023072114-brownnose-browbeat-6258@gregkh' --subject-prefix 'PATCH 5.4.y' HEAD^.. Possible dependencies: e38e2c6a9efc ("tracing/probes: Fix to update dynamic data counter if fetcharg uses it") 8565a45d0858 ("tracing/probes: Have process_fetch_insn() take a void * instead of pt_regs") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From e38e2c6a9efc435f9de344b7c91f7697e01b47d5 Mon Sep 17 00:00:00 2001 From: "Masami Hiramatsu (Google)" <mhiramat(a)kernel.org> Date: Tue, 11 Jul 2023 23:15:48 +0900 Subject: [PATCH] tracing/probes: Fix to update dynamic data counter if fetcharg uses it Fix to update dynamic data counter ('dyndata') and max length ('maxlen') only if the fetcharg uses the dynamic data. Also get out arg->dynamic from unlikely(). This makes dynamic data address wrong if process_fetch_insn() returns error on !arg->dynamic case. Link: https://lore.kernel.org/all/168908494781.123124.8160245359962103684.stgit@d… Suggested-by: Steven Rostedt <rostedt(a)goodmis.org> Link: https://lore.kernel.org/all/20230710233400.5aaf024e@gandalf.local.home/ Fixes: 9178412ddf5a ("tracing: probeevent: Return consumed bytes of dynamic area") Cc: stable(a)vger.kernel.org Signed-off-by: Masami Hiramatsu (Google) <mhiramat(a)kernel.org> Reviewed-by: Steven Rostedt (Google) <rostedt(a)goodmis.org> diff --git a/kernel/trace/trace_probe_tmpl.h b/kernel/trace/trace_probe_tmpl.h index ed9d57c6b041..185da001f4c3 100644 --- a/kernel/trace/trace_probe_tmpl.h +++ b/kernel/trace/trace_probe_tmpl.h @@ -267,11 +267,13 @@ store_trace_args(void *data, struct trace_probe *tp, void *rec, if (unlikely(arg->dynamic)) *dl = make_data_loc(maxlen, dyndata - base); ret = process_fetch_insn(arg->code, rec, dl, base); - if (unlikely(ret < 0 && arg->dynamic)) { - *dl = make_data_loc(0, dyndata - base); - } else { - dyndata += ret; - maxlen -= ret; + if (arg->dynamic) { + if (unlikely(ret < 0)) { + *dl = make_data_loc(0, dyndata - base); + } else { + dyndata += ret; + maxlen -= ret; + } } } }

1 year, 11 months

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FAILED: patch "[PATCH] tracing/probes: Fix to update dynamic data counter if" failed to apply to 5.10-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.10-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>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.10.y git checkout FETCH_HEAD git cherry-pick -x e38e2c6a9efc435f9de344b7c91f7697e01b47d5 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2023072113-repave-bootleg-b466@gregkh' --subject-prefix 'PATCH 5.10.y' HEAD^.. Possible dependencies: e38e2c6a9efc ("tracing/probes: Fix to update dynamic data counter if fetcharg uses it") 8565a45d0858 ("tracing/probes: Have process_fetch_insn() take a void * instead of pt_regs") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From e38e2c6a9efc435f9de344b7c91f7697e01b47d5 Mon Sep 17 00:00:00 2001 From: "Masami Hiramatsu (Google)" <mhiramat(a)kernel.org> Date: Tue, 11 Jul 2023 23:15:48 +0900 Subject: [PATCH] tracing/probes: Fix to update dynamic data counter if fetcharg uses it Fix to update dynamic data counter ('dyndata') and max length ('maxlen') only if the fetcharg uses the dynamic data. Also get out arg->dynamic from unlikely(). This makes dynamic data address wrong if process_fetch_insn() returns error on !arg->dynamic case. Link: https://lore.kernel.org/all/168908494781.123124.8160245359962103684.stgit@d… Suggested-by: Steven Rostedt <rostedt(a)goodmis.org> Link: https://lore.kernel.org/all/20230710233400.5aaf024e@gandalf.local.home/ Fixes: 9178412ddf5a ("tracing: probeevent: Return consumed bytes of dynamic area") Cc: stable(a)vger.kernel.org Signed-off-by: Masami Hiramatsu (Google) <mhiramat(a)kernel.org> Reviewed-by: Steven Rostedt (Google) <rostedt(a)goodmis.org> diff --git a/kernel/trace/trace_probe_tmpl.h b/kernel/trace/trace_probe_tmpl.h index ed9d57c6b041..185da001f4c3 100644 --- a/kernel/trace/trace_probe_tmpl.h +++ b/kernel/trace/trace_probe_tmpl.h @@ -267,11 +267,13 @@ store_trace_args(void *data, struct trace_probe *tp, void *rec, if (unlikely(arg->dynamic)) *dl = make_data_loc(maxlen, dyndata - base); ret = process_fetch_insn(arg->code, rec, dl, base); - if (unlikely(ret < 0 && arg->dynamic)) { - *dl = make_data_loc(0, dyndata - base); - } else { - dyndata += ret; - maxlen -= ret; + if (arg->dynamic) { + if (unlikely(ret < 0)) { + *dl = make_data_loc(0, dyndata - base); + } else { + dyndata += ret; + maxlen -= ret; + } } } }

1 year, 11 months

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