June 2020 - Linux-stable-mirror

[PATCH] iommu/vt-d: Remove real DMA lookup in find_domain

by Sushma Kalakota

From: Jon Derrick <jonathan.derrick(a)intel.com> commit bba9cc2cf82840bd3c9b3f4f7edac2dc8329ci241 upstream By removing the real DMA indirection in find_domain(), we can allow sub-devices of a real DMA device to have their own valid device_domain_info. The dmar lookup and context entry removal paths have been fixed to account for sub-devices. Fixes: 2b0140c69637 ("iommu/vt-d: Use pci_real_dma_dev() for mapping") Signed-off-by: Jon Derrick <jonathan.derrick(a)intel.com> Acked-by: Lu Baolu <baolu.lu(a)linux.intel.com> Link: https://lore.kernel.org/r/20200527165617.297470-4-jonathan.derrick@intel.com Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=207575 Signed-off-by: Joerg Roedel <jroedel(a)suse.de> Signed-off-by: Sushma Kalakota <sushmax.kalakota(a)intel.com> --- Hi, Please apply this patch to 5.7 (and 5.6 if it's still being maintained). This patch is part 3 of a 3-patch series, of which [1][2] have been applied to 5.7. This patch is necessary to prevent kernel panics in specific configurations. [1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… [2] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… drivers/iommu/intel-iommu.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 11ed871dd255..fde7aba49b74 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -2518,9 +2518,6 @@ struct dmar_domain *find_domain(struct device *dev) if (unlikely(attach_deferred(dev) || iommu_dummy(dev))) return NULL; - if (dev_is_pci(dev)) - dev = &pci_real_dma_dev(to_pci_dev(dev))->dev; - /* No lock here, assumes no domain exit in normal case */ info = dev->archdata.iommu; if (likely(info)) -- 2.17.1

4 years, 6 months

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[PATCH AUTOSEL 4.14 001/108] power: supply: bq24257_charger: Replace depends on REGMAP_I2C with select

by Sasha Levin

From: Enric Balletbo i Serra <enric.balletbo(a)collabora.com> [ Upstream commit 87c3d579c8ed0eaea6b1567d529a8daa85a2bc6c ] regmap is a library function that gets selected by drivers that need it. No driver modules should depend on it. Depending on REGMAP_I2C makes this driver only build if another driver already selected REGMAP_I2C, as the symbol can't be selected through the menu kernel configuration. Fixes: 2219a935963e ("power_supply: Add TI BQ24257 charger driver") Signed-off-by: Enric Balletbo i Serra <enric.balletbo(a)collabora.com> Signed-off-by: Sebastian Reichel <sebastian.reichel(a)collabora.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- drivers/power/supply/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig index 5ab90c1f3f7c..24163cf8612c 100644 --- a/drivers/power/supply/Kconfig +++ b/drivers/power/supply/Kconfig @@ -530,7 +530,7 @@ config CHARGER_BQ24257 tristate "TI BQ24250/24251/24257 battery charger driver" depends on I2C depends on GPIOLIB || COMPILE_TEST - depends on REGMAP_I2C + select REGMAP_I2C help Say Y to enable support for the TI BQ24250, BQ24251, and BQ24257 battery chargers. -- 2.25.1

4 years, 6 months

4
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Re: [RESEND PATCH v2] ARM: dts: imx6qdl-gw551x: fix audio SSI

by Tim Harvey

On Tue, Jun 23, 2020 at 11:41 AM Fabio Estevam <festevam(a)gmail.com> wrote: > > Hi Tim, > > On Tue, Jun 23, 2020 at 3:31 PM Tim Harvey <tharvey(a)gateworks.com> wrote: > > > > The audio codec on the GW551x routes to ssi1 > > > > Signed-off-by: Tim Harvey <tharvey(a)gateworks.com> > > Shouldn't this have a Fixes tag, so that it could be backported to > older stable kernels? Fabio, Yes, it likely should as it fixes audio capture from 3117e851cef1b4e1. I didn't think it would apply cleanly to stable but it looks like it does. I cc'd stable(a)vger.kernel.org. Should I submit a new revision with the following? Cc: stable(a)vger.kernel.org Fixes: 3117e851cef1b4e1 ("ARM: dts: imx: Add TDA19971 HDMI Receiver to GW551x") Thanks, Tim

4 years, 6 months

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[PATCH 4.4] net: Revert "pkt_sched: fq: use proper locking in fq_dump_stats()"

by Toke Høiland-Jørgensen

This reverts commit 191cf872190de28a92e1bd2b56d8860e37e07443. That commit should never have been backported since it relies on a change in locking semantics that was introduced in v4.8 and not backported. Because of this, the backported commit to sch_fq leads to lockups because of the double locking. Signed-off-by: Toke Høiland-Jørgensen <toke(a)redhat.com> --- net/sched/sch_fq.c | 32 ++++++++++++++------------------ 1 file changed, 14 insertions(+), 18 deletions(-) diff --git a/net/sched/sch_fq.c b/net/sched/sch_fq.c index f4aa2ab4713a..eb814ffc0902 100644 --- a/net/sched/sch_fq.c +++ b/net/sched/sch_fq.c @@ -830,24 +830,20 @@ nla_put_failure: static int fq_dump_stats(struct Qdisc *sch, struct gnet_dump *d) { struct fq_sched_data *q = qdisc_priv(sch); - struct tc_fq_qd_stats st; - - sch_tree_lock(sch); - - st.gc_flows = q->stat_gc_flows; - st.highprio_packets = q->stat_internal_packets; - st.tcp_retrans = q->stat_tcp_retrans; - st.throttled = q->stat_throttled; - st.flows_plimit = q->stat_flows_plimit; - st.pkts_too_long = q->stat_pkts_too_long; - st.allocation_errors = q->stat_allocation_errors; - st.time_next_delayed_flow = q->time_next_delayed_flow - ktime_get_ns(); - st.flows = q->flows; - st.inactive_flows = q->inactive_flows; - st.throttled_flows = q->throttled_flows; - st.pad = 0; - - sch_tree_unlock(sch); + u64 now = ktime_get_ns(); + struct tc_fq_qd_stats st = { + .gc_flows = q->stat_gc_flows, + .highprio_packets = q->stat_internal_packets, + .tcp_retrans = q->stat_tcp_retrans, + .throttled = q->stat_throttled, + .flows_plimit = q->stat_flows_plimit, + .pkts_too_long = q->stat_pkts_too_long, + .allocation_errors = q->stat_allocation_errors, + .flows = q->flows, + .inactive_flows = q->inactive_flows, + .throttled_flows = q->throttled_flows, + .time_next_delayed_flow = q->time_next_delayed_flow - now, + }; return gnet_stats_copy_app(d, &st, sizeof(st)); } -- 2.27.0

4 years, 6 months

2
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[PATCH AUTOSEL 4.4 1/3] net: alx: fix race condition in alx_remove

by Sasha Levin

From: Zekun Shen <bruceshenzk(a)gmail.com> [ Upstream commit e89df5c4322c1bf495f62d74745895b5fd2a4393 ] There is a race condition exist during termination. The path is alx_stop and then alx_remove. An alx_schedule_link_check could be called before alx_stop by interrupt handler and invoke alx_link_check later. Alx_stop frees the napis, and alx_remove cancels any pending works. If any of the work is scheduled before termination and invoked before alx_remove, a null-ptr-deref occurs because both expect alx->napis[i]. This patch fix the race condition by moving cancel_work_sync functions before alx_free_napis inside alx_stop. Because interrupt handler can call alx_schedule_link_check again, alx_free_irq is moved before cancel_work_sync calls too. Signed-off-by: Zekun Shen <bruceshenzk(a)gmail.com> Signed-off-by: David S. Miller <davem(a)davemloft.net> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- drivers/net/ethernet/atheros/alx/main.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/net/ethernet/atheros/alx/main.c b/drivers/net/ethernet/atheros/alx/main.c index df54475d163bf..43bcc19c90680 100644 --- a/drivers/net/ethernet/atheros/alx/main.c +++ b/drivers/net/ethernet/atheros/alx/main.c @@ -872,8 +872,12 @@ static int __alx_open(struct alx_priv *alx, bool resume) static void __alx_stop(struct alx_priv *alx) { - alx_halt(alx); alx_free_irq(alx); + + cancel_work_sync(&alx->link_check_wk); + cancel_work_sync(&alx->reset_wk); + + alx_halt(alx); alx_free_rings(alx); } @@ -1406,9 +1410,6 @@ static void alx_remove(struct pci_dev *pdev) struct alx_priv *alx = pci_get_drvdata(pdev); struct alx_hw *hw = &alx->hw; - cancel_work_sync(&alx->link_check_wk); - cancel_work_sync(&alx->reset_wk); - /* restore permanent mac address */ alx_set_macaddr(hw, hw->perm_addr); -- 2.25.1

4 years, 6 months

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[PATCH AUTOSEL 4.9 1/6] ata/libata: Fix usage of page address by page_address in ata_scsi_mode_select_xlat function

by Sasha Levin

From: Ye Bin <yebin10(a)huawei.com> [ Upstream commit f650ef61e040bcb175dd8762164b00a5d627f20e ] BUG: KASAN: use-after-free in ata_scsi_mode_select_xlat+0x10bd/0x10f0 drivers/ata/libata-scsi.c:4045 Read of size 1 at addr ffff88803b8cd003 by task syz-executor.6/12621 CPU: 1 PID: 12621 Comm: syz-executor.6 Not tainted 4.19.95 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1ubuntu1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0xac/0xee lib/dump_stack.c:118 print_address_description+0x60/0x223 mm/kasan/report.c:253 kasan_report_error mm/kasan/report.c:351 [inline] kasan_report mm/kasan/report.c:409 [inline] kasan_report.cold+0xae/0x2d8 mm/kasan/report.c:393 ata_scsi_mode_select_xlat+0x10bd/0x10f0 drivers/ata/libata-scsi.c:4045 ata_scsi_translate+0x2da/0x680 drivers/ata/libata-scsi.c:2035 __ata_scsi_queuecmd drivers/ata/libata-scsi.c:4360 [inline] ata_scsi_queuecmd+0x2e4/0x790 drivers/ata/libata-scsi.c:4409 scsi_dispatch_cmd+0x2ee/0x6c0 drivers/scsi/scsi_lib.c:1867 scsi_queue_rq+0xfd7/0x1990 drivers/scsi/scsi_lib.c:2170 blk_mq_dispatch_rq_list+0x1e1/0x19a0 block/blk-mq.c:1186 blk_mq_do_dispatch_sched+0x147/0x3d0 block/blk-mq-sched.c:108 blk_mq_sched_dispatch_requests+0x427/0x680 block/blk-mq-sched.c:204 __blk_mq_run_hw_queue+0xbc/0x200 block/blk-mq.c:1308 __blk_mq_delay_run_hw_queue+0x3c0/0x460 block/blk-mq.c:1376 blk_mq_run_hw_queue+0x152/0x310 block/blk-mq.c:1413 blk_mq_sched_insert_request+0x337/0x6c0 block/blk-mq-sched.c:397 blk_execute_rq_nowait+0x124/0x320 block/blk-exec.c:64 blk_execute_rq+0xc5/0x112 block/blk-exec.c:101 sg_scsi_ioctl+0x3b0/0x6a0 block/scsi_ioctl.c:507 sg_ioctl+0xd37/0x23f0 drivers/scsi/sg.c:1106 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0xae6/0x1030 fs/ioctl.c:688 ksys_ioctl+0x76/0xa0 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710 do_syscall_64+0xa0/0x2e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45c479 Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fb0e9602c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fb0e96036d4 RCX: 000000000045c479 RDX: 0000000020000040 RSI: 0000000000000001 RDI: 0000000000000003 RBP: 000000000076bfc0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 000000000000046d R14: 00000000004c6e1a R15: 000000000076bfcc Allocated by task 12577: set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc mm/kasan/kasan.c:553 [inline] kasan_kmalloc+0xbf/0xe0 mm/kasan/kasan.c:531 __kmalloc+0xf3/0x1e0 mm/slub.c:3749 kmalloc include/linux/slab.h:520 [inline] load_elf_phdrs+0x118/0x1b0 fs/binfmt_elf.c:441 load_elf_binary+0x2de/0x4610 fs/binfmt_elf.c:737 search_binary_handler fs/exec.c:1654 [inline] search_binary_handler+0x15c/0x4e0 fs/exec.c:1632 exec_binprm fs/exec.c:1696 [inline] __do_execve_file.isra.0+0xf52/0x1a90 fs/exec.c:1820 do_execveat_common fs/exec.c:1866 [inline] do_execve fs/exec.c:1883 [inline] __do_sys_execve fs/exec.c:1964 [inline] __se_sys_execve fs/exec.c:1959 [inline] __x64_sys_execve+0x8a/0xb0 fs/exec.c:1959 do_syscall_64+0xa0/0x2e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Freed by task 12577: set_track mm/kasan/kasan.c:460 [inline] __kasan_slab_free+0x129/0x170 mm/kasan/kasan.c:521 slab_free_hook mm/slub.c:1370 [inline] slab_free_freelist_hook mm/slub.c:1397 [inline] slab_free mm/slub.c:2952 [inline] kfree+0x8b/0x1a0 mm/slub.c:3904 load_elf_binary+0x1be7/0x4610 fs/binfmt_elf.c:1118 search_binary_handler fs/exec.c:1654 [inline] search_binary_handler+0x15c/0x4e0 fs/exec.c:1632 exec_binprm fs/exec.c:1696 [inline] __do_execve_file.isra.0+0xf52/0x1a90 fs/exec.c:1820 do_execveat_common fs/exec.c:1866 [inline] do_execve fs/exec.c:1883 [inline] __do_sys_execve fs/exec.c:1964 [inline] __se_sys_execve fs/exec.c:1959 [inline] __x64_sys_execve+0x8a/0xb0 fs/exec.c:1959 do_syscall_64+0xa0/0x2e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x44/0xa9 The buggy address belongs to the object at ffff88803b8ccf00 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 259 bytes inside of 512-byte region [ffff88803b8ccf00, ffff88803b8cd100) The buggy address belongs to the page: page:ffffea0000ee3300 count:1 mapcount:0 mapping:ffff88806cc03080 index:0xffff88803b8cc780 compound_mapcount: 0 flags: 0x100000000008100(slab|head) raw: 0100000000008100 ffffea0001104080 0000000200000002 ffff88806cc03080 raw: ffff88803b8cc780 00000000800c000b 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88803b8ccf00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88803b8ccf80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88803b8cd000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88803b8cd080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88803b8cd100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc You can refer to "https://www.lkml.org/lkml/2019/1/17/474" reproduce this error. The exception code is "bd_len = p[3];", "p" value is ffff88803b8cd000 which belongs to the cache kmalloc-512 of size 512. The "page_address(sg_page(scsi_sglist(scmd)))" maybe from sg_scsi_ioctl function "buffer" which allocated by kzalloc, so "buffer" may not page aligned. This also looks completely buggy on highmem systems and really needs to use a kmap_atomic. --Christoph Hellwig To address above bugs, Paolo Bonzini advise to simpler to just make a char array of size CACHE_MPAGE_LEN+8+8+4-2(or just 64 to make it easy), use sg_copy_to_buffer to copy from the sglist into the buffer, and workthere. Signed-off-by: Ye Bin <yebin10(a)huawei.com> Signed-off-by: Jens Axboe <axboe(a)kernel.dk> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- drivers/ata/libata-scsi.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index c4f2b563c9f03..f4b38adb9d8a7 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -3967,12 +3967,13 @@ static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc) { struct scsi_cmnd *scmd = qc->scsicmd; const u8 *cdb = scmd->cmnd; - const u8 *p; u8 pg, spg; unsigned six_byte, pg_len, hdr_len, bd_len; int len; u16 fp = (u16)-1; u8 bp = 0xff; + u8 buffer[64]; + const u8 *p = buffer; VPRINTK("ENTER\n"); @@ -4006,12 +4007,14 @@ static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc) if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len) goto invalid_param_len; - p = page_address(sg_page(scsi_sglist(scmd))); - /* Move past header and block descriptors. */ if (len < hdr_len) goto invalid_param_len; + if (!sg_copy_to_buffer(scsi_sglist(scmd), scsi_sg_count(scmd), + buffer, sizeof(buffer))) + goto invalid_param_len; + if (six_byte) bd_len = p[3]; else -- 2.25.1

4 years, 6 months

1
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[PATCH AUTOSEL 4.14 1/6] ata/libata: Fix usage of page address by page_address in ata_scsi_mode_select_xlat function

by Sasha Levin

From: Ye Bin <yebin10(a)huawei.com> [ Upstream commit f650ef61e040bcb175dd8762164b00a5d627f20e ] BUG: KASAN: use-after-free in ata_scsi_mode_select_xlat+0x10bd/0x10f0 drivers/ata/libata-scsi.c:4045 Read of size 1 at addr ffff88803b8cd003 by task syz-executor.6/12621 CPU: 1 PID: 12621 Comm: syz-executor.6 Not tainted 4.19.95 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1ubuntu1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0xac/0xee lib/dump_stack.c:118 print_address_description+0x60/0x223 mm/kasan/report.c:253 kasan_report_error mm/kasan/report.c:351 [inline] kasan_report mm/kasan/report.c:409 [inline] kasan_report.cold+0xae/0x2d8 mm/kasan/report.c:393 ata_scsi_mode_select_xlat+0x10bd/0x10f0 drivers/ata/libata-scsi.c:4045 ata_scsi_translate+0x2da/0x680 drivers/ata/libata-scsi.c:2035 __ata_scsi_queuecmd drivers/ata/libata-scsi.c:4360 [inline] ata_scsi_queuecmd+0x2e4/0x790 drivers/ata/libata-scsi.c:4409 scsi_dispatch_cmd+0x2ee/0x6c0 drivers/scsi/scsi_lib.c:1867 scsi_queue_rq+0xfd7/0x1990 drivers/scsi/scsi_lib.c:2170 blk_mq_dispatch_rq_list+0x1e1/0x19a0 block/blk-mq.c:1186 blk_mq_do_dispatch_sched+0x147/0x3d0 block/blk-mq-sched.c:108 blk_mq_sched_dispatch_requests+0x427/0x680 block/blk-mq-sched.c:204 __blk_mq_run_hw_queue+0xbc/0x200 block/blk-mq.c:1308 __blk_mq_delay_run_hw_queue+0x3c0/0x460 block/blk-mq.c:1376 blk_mq_run_hw_queue+0x152/0x310 block/blk-mq.c:1413 blk_mq_sched_insert_request+0x337/0x6c0 block/blk-mq-sched.c:397 blk_execute_rq_nowait+0x124/0x320 block/blk-exec.c:64 blk_execute_rq+0xc5/0x112 block/blk-exec.c:101 sg_scsi_ioctl+0x3b0/0x6a0 block/scsi_ioctl.c:507 sg_ioctl+0xd37/0x23f0 drivers/scsi/sg.c:1106 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0xae6/0x1030 fs/ioctl.c:688 ksys_ioctl+0x76/0xa0 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710 do_syscall_64+0xa0/0x2e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45c479 Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fb0e9602c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fb0e96036d4 RCX: 000000000045c479 RDX: 0000000020000040 RSI: 0000000000000001 RDI: 0000000000000003 RBP: 000000000076bfc0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 000000000000046d R14: 00000000004c6e1a R15: 000000000076bfcc Allocated by task 12577: set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc mm/kasan/kasan.c:553 [inline] kasan_kmalloc+0xbf/0xe0 mm/kasan/kasan.c:531 __kmalloc+0xf3/0x1e0 mm/slub.c:3749 kmalloc include/linux/slab.h:520 [inline] load_elf_phdrs+0x118/0x1b0 fs/binfmt_elf.c:441 load_elf_binary+0x2de/0x4610 fs/binfmt_elf.c:737 search_binary_handler fs/exec.c:1654 [inline] search_binary_handler+0x15c/0x4e0 fs/exec.c:1632 exec_binprm fs/exec.c:1696 [inline] __do_execve_file.isra.0+0xf52/0x1a90 fs/exec.c:1820 do_execveat_common fs/exec.c:1866 [inline] do_execve fs/exec.c:1883 [inline] __do_sys_execve fs/exec.c:1964 [inline] __se_sys_execve fs/exec.c:1959 [inline] __x64_sys_execve+0x8a/0xb0 fs/exec.c:1959 do_syscall_64+0xa0/0x2e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Freed by task 12577: set_track mm/kasan/kasan.c:460 [inline] __kasan_slab_free+0x129/0x170 mm/kasan/kasan.c:521 slab_free_hook mm/slub.c:1370 [inline] slab_free_freelist_hook mm/slub.c:1397 [inline] slab_free mm/slub.c:2952 [inline] kfree+0x8b/0x1a0 mm/slub.c:3904 load_elf_binary+0x1be7/0x4610 fs/binfmt_elf.c:1118 search_binary_handler fs/exec.c:1654 [inline] search_binary_handler+0x15c/0x4e0 fs/exec.c:1632 exec_binprm fs/exec.c:1696 [inline] __do_execve_file.isra.0+0xf52/0x1a90 fs/exec.c:1820 do_execveat_common fs/exec.c:1866 [inline] do_execve fs/exec.c:1883 [inline] __do_sys_execve fs/exec.c:1964 [inline] __se_sys_execve fs/exec.c:1959 [inline] __x64_sys_execve+0x8a/0xb0 fs/exec.c:1959 do_syscall_64+0xa0/0x2e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x44/0xa9 The buggy address belongs to the object at ffff88803b8ccf00 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 259 bytes inside of 512-byte region [ffff88803b8ccf00, ffff88803b8cd100) The buggy address belongs to the page: page:ffffea0000ee3300 count:1 mapcount:0 mapping:ffff88806cc03080 index:0xffff88803b8cc780 compound_mapcount: 0 flags: 0x100000000008100(slab|head) raw: 0100000000008100 ffffea0001104080 0000000200000002 ffff88806cc03080 raw: ffff88803b8cc780 00000000800c000b 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88803b8ccf00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88803b8ccf80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88803b8cd000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88803b8cd080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88803b8cd100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc You can refer to "https://www.lkml.org/lkml/2019/1/17/474" reproduce this error. The exception code is "bd_len = p[3];", "p" value is ffff88803b8cd000 which belongs to the cache kmalloc-512 of size 512. The "page_address(sg_page(scsi_sglist(scmd)))" maybe from sg_scsi_ioctl function "buffer" which allocated by kzalloc, so "buffer" may not page aligned. This also looks completely buggy on highmem systems and really needs to use a kmap_atomic. --Christoph Hellwig To address above bugs, Paolo Bonzini advise to simpler to just make a char array of size CACHE_MPAGE_LEN+8+8+4-2(or just 64 to make it easy), use sg_copy_to_buffer to copy from the sglist into the buffer, and workthere. Signed-off-by: Ye Bin <yebin10(a)huawei.com> Signed-off-by: Jens Axboe <axboe(a)kernel.dk> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- drivers/ata/libata-scsi.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index 2f81d65342709..bc2c27f0493fc 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -3996,12 +3996,13 @@ static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc) { struct scsi_cmnd *scmd = qc->scsicmd; const u8 *cdb = scmd->cmnd; - const u8 *p; u8 pg, spg; unsigned six_byte, pg_len, hdr_len, bd_len; int len; u16 fp = (u16)-1; u8 bp = 0xff; + u8 buffer[64]; + const u8 *p = buffer; VPRINTK("ENTER\n"); @@ -4035,12 +4036,14 @@ static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc) if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len) goto invalid_param_len; - p = page_address(sg_page(scsi_sglist(scmd))); - /* Move past header and block descriptors. */ if (len < hdr_len) goto invalid_param_len; + if (!sg_copy_to_buffer(scsi_sglist(scmd), scsi_sg_count(scmd), + buffer, sizeof(buffer))) + goto invalid_param_len; + if (six_byte) bd_len = p[3]; else -- 2.25.1

4 years, 6 months

1
5
0 0

[PATCH AUTOSEL 4.19 01/15] sata_rcar: handle pm_runtime_get_sync failure cases

by Sasha Levin

From: Navid Emamdoost <navid.emamdoost(a)gmail.com> [ Upstream commit eea1238867205b9e48a67c1a63219529a73c46fd ] Calling pm_runtime_get_sync increments the counter even in case of failure, causing incorrect ref count. Call pm_runtime_put if pm_runtime_get_sync fails. Signed-off-by: Navid Emamdoost <navid.emamdoost(a)gmail.com> Signed-off-by: Jens Axboe <axboe(a)kernel.dk> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- drivers/ata/sata_rcar.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/drivers/ata/sata_rcar.c b/drivers/ata/sata_rcar.c index 03867f539f3a8..50ebd779d975f 100644 --- a/drivers/ata/sata_rcar.c +++ b/drivers/ata/sata_rcar.c @@ -909,7 +909,7 @@ static int sata_rcar_probe(struct platform_device *pdev) pm_runtime_enable(dev); ret = pm_runtime_get_sync(dev); if (ret < 0) - goto err_pm_disable; + goto err_pm_put; host = ata_host_alloc(dev, 1); if (!host) { @@ -940,7 +940,6 @@ static int sata_rcar_probe(struct platform_device *pdev) err_pm_put: pm_runtime_put(dev); -err_pm_disable: pm_runtime_disable(dev); return ret; } @@ -994,8 +993,10 @@ static int sata_rcar_resume(struct device *dev) int ret; ret = pm_runtime_get_sync(dev); - if (ret < 0) + if (ret < 0) { + pm_runtime_put(dev); return ret; + } if (priv->type == RCAR_GEN3_SATA) { sata_rcar_init_module(priv); @@ -1020,8 +1021,10 @@ static int sata_rcar_restore(struct device *dev) int ret; ret = pm_runtime_get_sync(dev); - if (ret < 0) + if (ret < 0) { + pm_runtime_put(dev); return ret; + } sata_rcar_setup_port(host); -- 2.25.1

4 years, 6 months

1
14
0 0

[PATCH AUTOSEL 5.4 01/24] sata_rcar: handle pm_runtime_get_sync failure cases

by Sasha Levin

From: Navid Emamdoost <navid.emamdoost(a)gmail.com> [ Upstream commit eea1238867205b9e48a67c1a63219529a73c46fd ] Calling pm_runtime_get_sync increments the counter even in case of failure, causing incorrect ref count. Call pm_runtime_put if pm_runtime_get_sync fails. Signed-off-by: Navid Emamdoost <navid.emamdoost(a)gmail.com> Signed-off-by: Jens Axboe <axboe(a)kernel.dk> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- drivers/ata/sata_rcar.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/drivers/ata/sata_rcar.c b/drivers/ata/sata_rcar.c index 3495e1733a8e6..c35b7b993133e 100644 --- a/drivers/ata/sata_rcar.c +++ b/drivers/ata/sata_rcar.c @@ -905,7 +905,7 @@ static int sata_rcar_probe(struct platform_device *pdev) pm_runtime_enable(dev); ret = pm_runtime_get_sync(dev); if (ret < 0) - goto err_pm_disable; + goto err_pm_put; host = ata_host_alloc(dev, 1); if (!host) { @@ -935,7 +935,6 @@ static int sata_rcar_probe(struct platform_device *pdev) err_pm_put: pm_runtime_put(dev); -err_pm_disable: pm_runtime_disable(dev); return ret; } @@ -989,8 +988,10 @@ static int sata_rcar_resume(struct device *dev) int ret; ret = pm_runtime_get_sync(dev); - if (ret < 0) + if (ret < 0) { + pm_runtime_put(dev); return ret; + } if (priv->type == RCAR_GEN3_SATA) { sata_rcar_init_module(priv); @@ -1015,8 +1016,10 @@ static int sata_rcar_restore(struct device *dev) int ret; ret = pm_runtime_get_sync(dev); - if (ret < 0) + if (ret < 0) { + pm_runtime_put(dev); return ret; + } sata_rcar_setup_port(host); -- 2.25.1

4 years, 6 months

1
23
0 0

[PATCH AUTOSEL 5.7 01/28] sata_rcar: handle pm_runtime_get_sync failure cases

by Sasha Levin

From: Navid Emamdoost <navid.emamdoost(a)gmail.com> [ Upstream commit eea1238867205b9e48a67c1a63219529a73c46fd ] Calling pm_runtime_get_sync increments the counter even in case of failure, causing incorrect ref count. Call pm_runtime_put if pm_runtime_get_sync fails. Signed-off-by: Navid Emamdoost <navid.emamdoost(a)gmail.com> Signed-off-by: Jens Axboe <axboe(a)kernel.dk> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- drivers/ata/sata_rcar.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/drivers/ata/sata_rcar.c b/drivers/ata/sata_rcar.c index 980aacdbcf3b4..141ac600b64c8 100644 --- a/drivers/ata/sata_rcar.c +++ b/drivers/ata/sata_rcar.c @@ -907,7 +907,7 @@ static int sata_rcar_probe(struct platform_device *pdev) pm_runtime_enable(dev); ret = pm_runtime_get_sync(dev); if (ret < 0) - goto err_pm_disable; + goto err_pm_put; host = ata_host_alloc(dev, 1); if (!host) { @@ -937,7 +937,6 @@ static int sata_rcar_probe(struct platform_device *pdev) err_pm_put: pm_runtime_put(dev); -err_pm_disable: pm_runtime_disable(dev); return ret; } @@ -991,8 +990,10 @@ static int sata_rcar_resume(struct device *dev) int ret; ret = pm_runtime_get_sync(dev); - if (ret < 0) + if (ret < 0) { + pm_runtime_put(dev); return ret; + } if (priv->type == RCAR_GEN3_SATA) { sata_rcar_init_module(priv); @@ -1017,8 +1018,10 @@ static int sata_rcar_restore(struct device *dev) int ret; ret = pm_runtime_get_sync(dev); - if (ret < 0) + if (ret < 0) { + pm_runtime_put(dev); return ret; + } sata_rcar_setup_port(host); -- 2.25.1

4 years, 6 months

1
27
0 0

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Linux-stable-mirror June 2020