Linaro-mm-sig

linaro-mm-sig@lists.linaro.org

17 participants
3289 discussions

[PATCH] drm/msm: Remove exclusive-fence hack

by Rob Clark

From: Rob Clark <robdclark(a)chromium.org> The workaround was initially necessary due to dma_resv having only a single exclusive fence slot, yet whe don't necessarily know what order the gpu scheduler will schedule jobs. Unfortunately this workaround also has the result of forcing implicit sync, even when userspace does not want it. However, since commit 047a1b877ed4 ("dma-buf & drm/amdgpu: remove dma_resv workaround") the workaround is no longer needed. So remove it. This effectively reverts commit f1b3f696a084 ("drm/msm: Don't break exclusive fence ordering") Signed-off-by: Rob Clark <robdclark(a)chromium.org> --- drivers/gpu/drm/msm/msm_gem_submit.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/gpu/drm/msm/msm_gem_submit.c b/drivers/gpu/drm/msm/msm_gem_submit.c index 5599d93ec0d2..cc48f73adadf 100644 --- a/drivers/gpu/drm/msm/msm_gem_submit.c +++ b/drivers/gpu/drm/msm/msm_gem_submit.c @@ -334,8 +334,7 @@ static int submit_fence_sync(struct msm_gem_submit *submit, bool no_implicit) if (ret) return ret; - /* exclusive fences must be ordered */ - if (no_implicit && !write) + if (no_implicit) continue; ret = drm_sched_job_add_implicit_dependencies(&submit->base, -- 2.38.1

3 years, 2 months

[PATCH v2] dma-buf: fix racing conflict of dma_heap_add()

by Dawei Li

Racing conflict could be: task A task B list_for_each_entry strcmp(h->name)) list_for_each_entry strcmp(h->name) kzalloc kzalloc ...... ..... device_create device_create list_add list_add The root cause is that task B has no idea about the fact someone else(A) has inserted heap with same name when it calls list_add, so a potential collision occurs. v1: https://lore.kernel.org/all/TYCP286MB2323950197F60FC3473123B7CA349@TYCP286M… v1->v2: Narrow down locking scope, check the existence of heap before insertion, as suggested by Andrew Davis. Fixes: c02a81fba74f ("dma-buf: Add dma-buf heaps framework") base-commit: 447fb14bf07905b880c9ed1ea92c53d6dd0649d7 Signed-off-by: Dawei Li <set_pte_at(a)outlook.com> --- drivers/dma-buf/dma-heap.c | 37 ++++++++++++++++++++++++++++--------- 1 file changed, 28 insertions(+), 9 deletions(-) diff --git a/drivers/dma-buf/dma-heap.c b/drivers/dma-buf/dma-heap.c index 8f5848aa144f..1c787a147e3a 100644 --- a/drivers/dma-buf/dma-heap.c +++ b/drivers/dma-buf/dma-heap.c @@ -216,9 +216,21 @@ const char *dma_heap_get_name(struct dma_heap *heap) return heap->name; } +static inline bool dma_heap_exist(const char *name) +{ + struct dma_heap *h; + + list_for_each_entry(h, &heap_list, list) { + if (!strcmp(h->name, name)) + return true; + } + + return false; +} + struct dma_heap *dma_heap_add(const struct dma_heap_export_info *exp_info) { - struct dma_heap *heap, *h, *err_ret; + struct dma_heap *heap, *err_ret; struct device *dev_ret; unsigned int minor; int ret; @@ -235,13 +247,11 @@ struct dma_heap *dma_heap_add(const struct dma_heap_export_info *exp_info) /* check the name is unique */ mutex_lock(&heap_list_lock); - list_for_each_entry(h, &heap_list, list) { - if (!strcmp(h->name, exp_info->name)) { - mutex_unlock(&heap_list_lock); - pr_err("dma_heap: Already registered heap named %s\n", - exp_info->name); - return ERR_PTR(-EINVAL); - } + if (dma_heap_exist(exp_info->name)) { + mutex_unlock(&heap_list_lock); + pr_err("dma_heap: Already registered heap named %s\n", + exp_info->name); + return ERR_PTR(-EINVAL); } mutex_unlock(&heap_list_lock); @@ -283,13 +293,22 @@ struct dma_heap *dma_heap_add(const struct dma_heap_export_info *exp_info) err_ret = ERR_CAST(dev_ret); goto err2; } + /* Add heap to the list */ mutex_lock(&heap_list_lock); + if (unlikely(dma_heap_exist(exp_info->name))) { + mutex_unlock(&heap_list_lock); + pr_err("dma_heap: Already registered heap named %s\n", + exp_info->name); + err_ret = ERR_PTR(-EINVAL); + goto err3; + } list_add(&heap->list, &heap_list); mutex_unlock(&heap_list_lock); return heap; - +err3: + device_destroy(dma_heap_class, heap->heap_devt); err2: cdev_del(&heap->heap_cdev); err1: -- 2.25.1

3 years, 2 months

[PATCH] drm/radeon: Replace kmap() with kmap_local_page()

by Fabio M. De Francesco

The use of kmap() is being deprecated in favor of kmap_local_page(). There are two main problems with kmap(): (1) It comes with an overhead as the mapping space is restricted and protected by a global lock for synchronization and (2) it also requires global TLB invalidation when the kmap’s pool wraps and it might block when the mapping space is fully utilized until a slot becomes available. With kmap_local_page() the mappings are per thread, CPU local, can take page faults, and can be called from any context (including interrupts). It is faster than kmap() in kernels with HIGHMEM enabled. Furthermore, the tasks can be preempted and, when they are scheduled to run again, the kernel virtual addresses are restored and still valid. Therefore, replace kmap() with kmap_local_page() in radeon_ttm_gtt_read(). Cc: "Venkataramanan, Anirudh" <anirudh.venkataramanan(a)intel.com> Suggested-by: Ira Weiny <ira.weiny(a)intel.com> Signed-off-by: Fabio M. De Francesco <fmdefrancesco(a)gmail.com> --- drivers/gpu/drm/radeon/radeon_ttm.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/radeon/radeon_ttm.c index d33fec488713..bdb4c0e0736b 100644 --- a/drivers/gpu/drm/radeon/radeon_ttm.c +++ b/drivers/gpu/drm/radeon/radeon_ttm.c @@ -869,11 +869,11 @@ static ssize_t radeon_ttm_gtt_read(struct file *f, char __user *buf, page = rdev->gart.pages[p]; if (page) { - ptr = kmap(page); + ptr = kmap_local_page(page); ptr += off; r = copy_to_user(buf, ptr, cur_size); - kunmap(rdev->gart.pages[p]); + kunmap_local(ptr); } else r = clear_user(buf, cur_size); -- 2.37.3

3 years, 2 months

[PATCH] dma-buf: fix racing conflict of dma_heap_add()

by Dawei Li

3 years, 2 months

[PATCH v2] dma-buf: cma_heap: Fix typo in comment

by Mark-PK Tsai

Remove duplicated "by" from comment in cma_heap_allocate(). Signed-off-by: Mark-PK Tsai <mark-pk.tsai(a)mediatek.com> --- drivers/dma-buf/heaps/cma_heap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/dma-buf/heaps/cma_heap.c b/drivers/dma-buf/heaps/cma_heap.c index 28fb04eccdd0..cd386ce639f3 100644 --- a/drivers/dma-buf/heaps/cma_heap.c +++ b/drivers/dma-buf/heaps/cma_heap.c @@ -316,7 +316,7 @@ static struct dma_buf *cma_heap_allocate(struct dma_heap *heap, kunmap_atomic(vaddr); /* * Avoid wasting time zeroing memory if the process - * has been killed by by SIGKILL + * has been killed by SIGKILL */ if (fatal_signal_pending(current)) goto free_cma; -- 2.18.0

3 years, 2 months

[PATCH v3] dma-buf: cma_heap: Remove duplicated 'by' in comment

by Mark-PK Tsai

Remove duplicated 'by' from comment in cma_heap_allocate(). Signed-off-by: Mark-PK Tsai <mark-pk.tsai(a)mediatek.com> --- drivers/dma-buf/heaps/cma_heap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/dma-buf/heaps/cma_heap.c b/drivers/dma-buf/heaps/cma_heap.c index 28fb04eccdd0..cd386ce639f3 100644 --- a/drivers/dma-buf/heaps/cma_heap.c +++ b/drivers/dma-buf/heaps/cma_heap.c @@ -316,7 +316,7 @@ static struct dma_buf *cma_heap_allocate(struct dma_heap *heap, kunmap_atomic(vaddr); /* * Avoid wasting time zeroing memory if the process - * has been killed by by SIGKILL + * has been killed by SIGKILL */ if (fatal_signal_pending(current)) goto free_cma; -- 2.18.0

3 years, 2 months

etnaviv OOPS, NULL pointer dereference on Linux 6.0.2

by Francesco Dolcini

Hello all, I got the following Oops, on a Apalis iMX6 Dual with 512MB RAM, running glmark2 tests with the system under memory pressure (OOM Killer!). It's not something systematic and I cannot tell if this is a regression or not, any suggestion? The system just froze afterward. [ 0.000000] Booting Linux on physical CPU 0x0 [ 0.000000] Linux version 6.0.2-6.1.0-devel+git.dab08f7eecdf (oe-user@oe-host) (arm-tdx-linux-gnueabi-gcc (GCC) 11.3.0, GNU ld (GNU Binutils) 2.38.20220708) #1 SMP Sat Oct 15 06:02:59 UTC 2022 [ 0.000000] CPU: ARMv7 Processor [412fc09a] revision 10 (ARMv7), cr=10c5387d [ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache [ 0.000000] OF: fdt: Machine model: Toradex Apalis iMX6Q/D Module on Ixora Carrier Board V1.1 ... [ 1.749471] etnaviv etnaviv: bound 130000.gpu (ops gpu_ops) [ 1.750527] etnaviv etnaviv: bound 134000.gpu (ops gpu_ops) [ 1.751522] etnaviv etnaviv: bound 2204000.gpu (ops gpu_ops) [ 1.751566] etnaviv-gpu 130000.gpu: model: GC2000, revision: 5108 [ 1.753141] etnaviv-gpu 134000.gpu: model: GC320, revision: 5007 [ 1.753392] etnaviv-gpu 2204000.gpu: model: GC355, revision: 1215 [ 1.753421] etnaviv-gpu 2204000.gpu: Ignoring GPU with VG and FE2.0 [ 1.756559] [drm] Initialized etnaviv 1.3.0 20151214 for etnaviv on minor 0 ... [ 480.994256] Out of memory: Killed process 1740 (Qt5_CinematicEx) total-vm:242656kB, anon-rss:105212kB, file-rss:9864kB, shmem-rss:1304kB, UID:0 pgtables:192kB oom_score_adj:0 [ 481.068691] 8<--- cut here --- [ 481.072037] Unable to handle kernel NULL pointer dereference at virtual address 00000004 [ 481.080366] [00000004] *pgd=00000000 [ 481.083994] Internal error: Oops: 805 [#1] SMP ARM [ 481.088813] Modules linked in: 8021q imx_sdma virt_dma coda_vpu v4l2_jpeg imx_vdoa dw_hdmi_ahb_audio fuse [ 481.098458] CPU: 1 PID: 1755 Comm: QSGRenderThread Not tainted 6.0.2-6.1.0-devel+git.dab08f7eecdf #1 [ 481.107619] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree) [ 481.114157] PC is at etnaviv_gem_free_object+0x40/0x128 [ 481.119412] LR is at lock_is_held_type+0xa4/0x15c [ 481.124138] pc : [<c0787f90>] lr : [<c0e46250>] psr: 60030113 [ 481.130421] sp : e1155da8 ip : 00000000 fp : 0000000c [ 481.135670] r10: c34ef400 r9 : c262066c r8 : 00000122 [ 481.140916] r7 : c2153000 r6 : c2153000 r5 : 00000870 r4 : c25f24a0 [ 481.147460] r3 : 00000000 r2 : 00000000 r1 : 00000100 r0 : 00000000 [ 481.153997] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none [ 481.161143] Control: 10c5387d Table: 2caf004a DAC: 00000051 [ 481.166896] Register r0 information: NULL pointer [ 481.171615] Register r1 information: non-paged memory [ 481.176694] Register r2 information: NULL pointer [ 481.181429] Register r3 information: NULL pointer [ 481.181441] Register r4 information: slab kmalloc-128 start c25f2480 pointer offset 32 size 128 [ 481.186173] Register r5 information: non-paged memory [ 481.186181] Register r6 information: slab kmalloc-512 start c2153000 pointer offset 0 size 512 [ 481.199953] Register r7 information: slab kmalloc-512 start c2153000 pointer offset 0 size 512 [ 481.199975] Register r8 information: non-paged memory [ 481.199983] Register r9 information: slab kmalloc-2k start c2620000 pointer offset 1644 size 2048 [ 481.222276] Register r10 information: slab kmalloc-1k start c34ef400 pointer offset 0 size 1024 [ 481.222297] Register r11 information: non-paged memory [ 481.245038] Register r12 information: NULL pointer [ 481.245056] Process QSGRenderThread (pid: 1755, stack limit = 0xd30acffa) [ 481.245070] Stack: (0xe1155da8 to 0xe1156000) [ 481.245084] 5da0: c0787f50 fffffff4 00000870 c8102400 c212f000 c2620000 [ 481.245094] 5dc0: c262066c c34ef400 0000000c c078693c 00000003 00000000 00000000 c07e2960 [ 481.245103] 5de0: c2153000 042beef1 c2153a00 c2620000 c8102400 c8102940 c34ef5e4 c07324ec [ 481.245112] 5e00: c262066c c34ef400 0000000c c2153a00 c2620000 c34ef400 e1155e6c c0732a5c [ 481.245121] 5e20: c00c642e 0000000c c212f000 0000000c c0f6d968 e1155e6c c34ef400 c0723448 [ 481.245130] 5e40: 0000e280 00000001 c12b5820 c212f000 aed13e60 e1155e6c 0000002e c2f39000 [ 481.245138] 5e60: c0732e44 00000051 00000000 00000000 00000000 0000000c c212f000 c212f7a0 [ 481.318348] 5e80: 00000000 c018b61c c212f000 c16e0d20 c03514d8 c156155c 60070013 c0193790 [ 481.318369] 5ea0: b28a3000 00000254 c6d00280 00000001 00000000 042beef1 00000009 00004000 [ 481.318378] 5ec0: c212f000 c3caf280 00000001 c2f39000 00000028 c03514f0 00000000 00000000 [ 481.342916] 5ee0: c03513f0 c212f7a0 00000000 042beef1 aed13e60 c00c642e c2f39001 c0100080 [ 481.342928] 5f00: aed13e60 c212f000 c2f39000 c25b8710 00000009 c0342234 00000000 042beef1 [ 481.342938] 5f20: c36866e0 80000007 c212f000 b28a311c c3686680 c36866e0 e1155fb0 80000007 [ 481.342948] 5f40: c212f000 c0e516b0 aefd7cd0 c01d34b0 000001e0 00000000 00000000 00000000 [ 481.342958] 5f60: 00000193 00000007 c160fd90 b28a311c e1155fb0 c0e51500 0000021c 042beef1 [ 481.342969] 5f80: adf87818 aed13e90 aed13e60 c00c642e 00000036 c01002b4 c212f000 00000036 [ 481.342978] 5fa0: adf87818 c0100080 aed13e90 aed13e60 00000009 c00c642e aed13e60 aed13e40 [ 481.342988] 5fc0: aed13e90 aed13e60 c00c642e 00000036 00000001 0000021c 00870000 adf87818 [ 481.408411] 5fe0: 00000036 aed13e28 b6088089 b6001ae6 60070030 00000009 00000000 00000000 [ 481.408431] etnaviv_gem_free_object from etnaviv_gem_prime_import_sg_table+0x12c/0x160 [ 481.408469] etnaviv_gem_prime_import_sg_table from drm_gem_prime_import_dev+0x98/0x150 [ 481.408509] drm_gem_prime_import_dev from drm_gem_prime_fd_to_handle+0x188/0x1f8 [ 481.408528] drm_gem_prime_fd_to_handle from drm_ioctl+0x1e8/0x3a0 [ 481.408545] drm_ioctl from sys_ioctl+0x530/0xdbc [ 481.408571] sys_ioctl from ret_fast_syscall+0x0/0x1c [ 481.408587] Exception stack(0xe1155fa8 to 0xe1155ff0) [ 481.408599] 5fa0: aed13e90 aed13e60 00000009 c00c642e aed13e60 aed13e40 [ 481.408608] 5fc0: aed13e90 aed13e60 c00c642e 00000036 00000001 0000021c 00870000 adf87818 [ 481.477625] 5fe0: 00000036 aed13e28 b6088089 b6001ae6 [ 481.477641] Code: e5962174 e59f80e0 e3a01c01 e1a07006 (e5823004) [ 481.477819] ---[ end trace 0000000000000000 ]--- Francesco

3 years, 2 months

[RFC][PATCH v2 12/31] timers: dma-buf: Use del_timer_shutdown() before freeing timer

by Steven Rostedt

From: "Steven Rostedt (Google)" <rostedt(a)goodmis.org> Before a timer is freed, del_timer_shutdown() must be called. Link: https://lore.kernel.org/all/20220407161745.7d6754b3@gandalf.local.home/ Cc: Sumit Semwal <sumit.semwal(a)linaro.org> Cc: "Christian König" <christian.koenig(a)amd.com> Cc: linux-media(a)vger.kernel.org Cc: dri-devel(a)lists.freedesktop.org Cc: linaro-mm-sig(a)lists.linaro.org Signed-off-by: Steven Rostedt (Google) <rostedt(a)goodmis.org> --- drivers/dma-buf/st-dma-fence.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/dma-buf/st-dma-fence.c b/drivers/dma-buf/st-dma-fence.c index fb6e0a6ae2c9..c67b70205b6f 100644 --- a/drivers/dma-buf/st-dma-fence.c +++ b/drivers/dma-buf/st-dma-fence.c @@ -412,7 +412,7 @@ static int test_wait_timeout(void *arg) err = 0; err_free: - del_timer_sync(&wt.timer); + del_timer_shutdown(&wt.timer); destroy_timer_on_stack(&wt.timer); dma_fence_signal(wt.f); dma_fence_put(wt.f); -- 2.35.1

3 years, 2 months

[PATCH] dma-buf: cma_heap: Fix typo in comment

by Mark-PK Tsai

Fix typo in comment. Signed-off-by: Mark-PK Tsai <mark-pk.tsai(a)mediatek.com> --- drivers/dma-buf/heaps/cma_heap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/dma-buf/heaps/cma_heap.c b/drivers/dma-buf/heaps/cma_heap.c index 28fb04eccdd0..cd386ce639f3 100644 --- a/drivers/dma-buf/heaps/cma_heap.c +++ b/drivers/dma-buf/heaps/cma_heap.c @@ -316,7 +316,7 @@ static struct dma_buf *cma_heap_allocate(struct dma_heap *heap, kunmap_atomic(vaddr); /* * Avoid wasting time zeroing memory if the process - * has been killed by by SIGKILL + * has been killed by SIGKILL */ if (fatal_signal_pending(current)) goto free_cma; -- 2.18.0

3 years, 2 months

Re: [syzbot] KASAN: use-after-free Read in task_work_run (2)

by syzbot

syzbot has found a reproducer for the following issue on: HEAD commit: 88619e77b33d net: stmmac: rk3588: Allow multiple gmac cont.. git tree: bpf console output: https://syzkaller.appspot.com/x/log.txt?x=1646d6f2880000 kernel config: https://syzkaller.appspot.com/x/.config?x=a66c6c673fb555e8 dashboard link: https://syzkaller.appspot.com/bug?extid=9228d6098455bb209ec8 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12bc425e880000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1126516e880000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/f8435d5c2c21/disk-88619e77.raw… vmlinux: https://storage.googleapis.com/syzbot-assets/551d8a013e81/vmlinux-88619e77.… kernel image: https://storage.googleapis.com/syzbot-assets/7d3f5c29064d/bzImage-88619e77.… IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+9228d6098455bb209ec8(a)syzkaller.appspotmail.com ================================================================== BUG: KASAN: use-after-free in task_work_run+0x1b0/0x270 kernel/task_work.c:178 Read of size 8 at addr ffff8880752b1c18 by task syz-executor361/3766 CPU: 0 PID: 3766 Comm: syz-executor361 Not tainted 6.1.0-rc2-syzkaller-00073-g88619e77b33d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:284 [inline] print_report+0x15e/0x45d mm/kasan/report.c:395 kasan_report+0xbb/0x1f0 mm/kasan/report.c:495 task_work_run+0x1b0/0x270 kernel/task_work.c:178 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0xb35/0x2a20 kernel/exit.c:820 do_group_exit+0xd0/0x2a0 kernel/exit.c:950 get_signal+0x21a1/0x2430 kernel/signal.c:2858 arch_do_signal_or_restart+0x82/0x2300 arch/x86/kernel/signal.c:869 exit_to_user_mode_loop kernel/entry/common.c:168 [inline] exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:203 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:296 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fb9f674b089 Code: Unable to access opcode bytes at 0x7fb9f674b05f. RSP: 002b:00007fb9f66fb318 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: 0000000000000001 RBX: 00007fb9f67da1a8 RCX: 00007fb9f674b089 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fb9f67da1ac RBP: 00007fb9f67da1a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000003100000400 R13: 00007fff658570cf R14: 00007fb9f66fb400 R15: 0000000000022000 </TASK> Allocated by task 3766: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:45 kasan_set_track+0x21/0x30 mm/kasan/common.c:52 __kasan_slab_alloc+0x7e/0x80 mm/kasan/common.c:325 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slab.h:737 [inline] slab_alloc_node mm/slub.c:3398 [inline] kmem_cache_alloc_node+0x2fc/0x400 mm/slub.c:3443 perf_event_alloc.part.0+0x69/0x3bc0 kernel/events/core.c:11625 perf_event_alloc kernel/events/core.c:12174 [inline] __do_sys_perf_event_open+0x4ae/0x32d0 kernel/events/core.c:12272 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 0: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:45 kasan_set_track+0x21/0x30 mm/kasan/common.c:52 kasan_save_free_info+0x2a/0x40 mm/kasan/generic.c:511 ____kasan_slab_free mm/kasan/common.c:236 [inline] ____kasan_slab_free+0x160/0x1c0 mm/kasan/common.c:200 kasan_slab_free include/linux/kasan.h:177 [inline] slab_free_hook mm/slub.c:1724 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1750 slab_free mm/slub.c:3661 [inline] kmem_cache_free+0xea/0x5b0 mm/slub.c:3683 rcu_do_batch kernel/rcu/tree.c:2250 [inline] rcu_core+0x81f/0x1980 kernel/rcu/tree.c:2510 __do_softirq+0x1f7/0xad8 kernel/softirq.c:571 Last potentially related work creation: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:45 __kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:481 call_rcu+0x99/0x820 kernel/rcu/tree.c:2798 put_event kernel/events/core.c:5095 [inline] perf_event_release_kernel+0x6f2/0x940 kernel/events/core.c:5210 perf_release+0x33/0x40 kernel/events/core.c:5220 __fput+0x27c/0xa90 fs/file_table.c:320 task_work_run+0x16b/0x270 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:203 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:296 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd Second to last potentially related work creation: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:45 __kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:481 task_work_add+0x7b/0x2c0 kernel/task_work.c:48 event_sched_out+0xe35/0x1190 kernel/events/core.c:2294 __perf_remove_from_context+0x87/0xc40 kernel/events/core.c:2359 event_function+0x29e/0x3e0 kernel/events/core.c:254 remote_function kernel/events/core.c:92 [inline] remote_function+0x11e/0x1a0 kernel/events/core.c:72 __flush_smp_call_function_queue+0x205/0x9a0 kernel/smp.c:630 __sysvec_call_function_single+0xca/0x4d0 arch/x86/kernel/smp.c:248 sysvec_call_function_single+0x8e/0xc0 arch/x86/kernel/smp.c:243 asm_sysvec_call_function_single+0x16/0x20 arch/x86/include/asm/idtentry.h:657 The buggy address belongs to the object at ffff8880752b17c0 which belongs to the cache perf_event of size 1392 The buggy address is located 1112 bytes inside of 1392-byte region [ffff8880752b17c0, ffff8880752b1d30) The buggy address belongs to the physical page: page:ffffea0001d4ac00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x752b0 head:ffffea0001d4ac00 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 0000000000000000 dead000000000122 ffff8880118c23c0 raw: 0000000000000000 0000000080150015 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 3754, tgid 3753 (syz-executor361), ts 58662170660, free_ts 58383135648 prep_new_page mm/page_alloc.c:2538 [inline] get_page_from_freelist+0x10b5/0x2d50 mm/page_alloc.c:4287 __alloc_pages+0x1c7/0x5a0 mm/page_alloc.c:5554 alloc_pages+0x1a6/0x270 mm/mempolicy.c:2285 alloc_slab_page mm/slub.c:1794 [inline] allocate_slab+0x213/0x300 mm/slub.c:1939 new_slab mm/slub.c:1992 [inline] ___slab_alloc+0xa91/0x1400 mm/slub.c:3180 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3279 slab_alloc_node mm/slub.c:3364 [inline] kmem_cache_alloc_node+0x189/0x400 mm/slub.c:3443 perf_event_alloc.part.0+0x69/0x3bc0 kernel/events/core.c:11625 perf_event_alloc kernel/events/core.c:12174 [inline] __do_sys_perf_event_open+0x4ae/0x32d0 kernel/events/core.c:12272 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1458 [inline] free_pcp_prepare+0x65c/0xd90 mm/page_alloc.c:1508 free_unref_page_prepare mm/page_alloc.c:3386 [inline] free_unref_page+0x19/0x4d0 mm/page_alloc.c:3482 __unfreeze_partials+0x17c/0x1a0 mm/slub.c:2586 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x62/0x80 mm/kasan/common.c:302 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slab.h:737 [inline] slab_alloc_node mm/slub.c:3398 [inline] slab_alloc mm/slub.c:3406 [inline] __kmem_cache_alloc_lru mm/slub.c:3413 [inline] kmem_cache_alloc+0x2ac/0x3c0 mm/slub.c:3422 kmem_cache_zalloc include/linux/slab.h:702 [inline] alloc_buffer_head+0x20/0x140 fs/buffer.c:2899 alloc_page_buffers+0x280/0x790 fs/buffer.c:829 create_empty_buffers+0x2c/0xf20 fs/buffer.c:1543 ext4_block_write_begin+0x10a7/0x15f0 fs/ext4/inode.c:1074 ext4_da_write_begin+0x44c/0xb50 fs/ext4/inode.c:3003 generic_perform_write+0x252/0x570 mm/filemap.c:3753 ext4_buffered_write_iter+0x15b/0x460 fs/ext4/file.c:285 ext4_file_write_iter+0x8b8/0x16e0 fs/ext4/file.c:700 __kernel_write_iter+0x25e/0x730 fs/read_write.c:517 Memory state around the buggy address: ffff8880752b1b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880752b1b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8880752b1c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880752b1c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880752b1d00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc ==================================================================

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