FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 100, space 0, times 1
CPU: 0 UID: 0 PID: 11 Comm: kworker/0:1 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Workqueue: events drm_fb_helper_damage_work
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
fail_dump lib/fault-inject.c:74 [inline]
should_fail_ex+0x3eb/0x540 lib/fault-inject.c:175
should_failslab+0xa8/0x100 mm/failslab.c:46
slab_pre_alloc_hook mm/slub.c:4675 [inline]
slab_alloc_node mm/slub.c:5011 [inline]
__kmalloc_cache_noprof+0x9e/0x600 mm/slub.c:5676
_kmalloc_noprof include/linux/slab.h:991 [inline]
_kzalloc_noprof include/linux/slab.h:1312 [inline]
drm_atomic_commit_alloc+0xa9/0x100 drivers/gpu/drm/drm_atomic.c:258
drm_atomic_helper_dirtyfb+0x129/0xfd0 drivers/gpu/drm/drm_damage_helper.c:128
drm_fbdev_shmem_helper_fb_dirty+0x160/0x310 drivers/gpu/drm/drm_fbdev_shmem.c:117
drm_fb_helper_fb_dirty drivers/gpu/drm/clients/drm_fbdev_helper.c:310 [inline]
drm_fb_helper_damage_work+0x84c/0xf20 drivers/gpu/drm/clients/drm_fbdev_helper.c:336
process_one_work kernel/workqueue.c:3495 [inline]
process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3578
worker_thread+0xa47/0xfb0 kernel/workqueue.c:3659
kthread+0x38b/0x480 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
------------[ cut here ]------------
virtio-pci 0000:00:01.0: [drm] Dirty helper failed: ret=-12
WARNING: drivers/gpu/drm/drm_fbdev_shmem.c:118 at drm_fbdev_shmem_helper_fb_dirty+0x1e1/0x310 drivers/gpu/drm/drm_fbdev_shmem.c:118, CPU#0: kworker/0:1/11
Modules linked in:
CPU: 0 UID: 0 PID: 11 Comm: kworker/0:1 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Workqueue: events drm_fb_helper_damage_work
RIP: 0010:drm_fbdev_shmem_helper_fb_dirty+0x288/0x310 drivers/gpu/drm/drm_fbdev_shmem.c:118
Code: 16 fc 4c 89 f8 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 ff e8 9a 4c 90 fc 4d 8b 27 48 89 df 4c 89 f6 4c 89 e2 8b 5c 24 04 89 d9 <67> 48 0f b9 3a 89 d8 e9 f7 fe ff ff 89 d9 80 e1 07 fe c1 38 c1 0f
RSP: 0018:ffffc9000024f898 EFLAGS: 00010246
RAX: 1ffff110061ff01a RBX: 00000000fffffff4 RCX: 00000000fffffff4
RDX: ffff88803129ee00 RSI: ffffffff8c9ad020 RDI: ffffffff91ca2d40
RBP: ffff888032260008 R08: 0000000000000dc0 R09: 00000000ffffffff
R10: dffffc0000000000 R11: fffffbfff2056d13 R12: ffff88803129ee00
R13: dffffc0000000000 R14: ffffffff8c9ad020 R15: ffff888030ff80d0
FS: 0000000000000000(0000) GS:ffff88808a9f9000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f42c29fade8 CR3: 0000000013673000 CR4: 0000000000352ef0
Call Trace:
drm_fb_helper_fb_dirty drivers/gpu/drm/clients/drm_fbdev_helper.c:310 [inline]
drm_fb_helper_damage_work+0x84c/0xf20 drivers/gpu/drm/clients/drm_fbdev_helper.c:336
process_one_work kernel/workqueue.c:3495 [inline]
process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3578
worker_thread+0xa47/0xfb0 kernel/workqueue.c:3659
kthread+0x38b/0x480 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
----------------
Code disassembly (best guess), 1 bytes skipped:
0: fc cld
1: 4c 89 f8 mov %r15,%rax
4: 48 c1 e8 03 shr $0x3,%rax
8: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1)
d: 74 08 je 0x17
f: 4c 89 ff mov %r15,%rdi
12: e8 9a 4c 90 fc call 0xfc904cb1
17: 4d 8b 27 mov (%r15),%r12
1a: 48 89 df mov %rbx,%rdi
1d: 4c 89 f6 mov %r14,%rsi
20: 4c 89 e2 mov %r12,%rdx
23: 8b 5c 24 04 mov 0x4(%rsp),%ebx
27: 89 d9 mov %ebx,%ecx
* 29: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction
2e: 89 d8 mov %ebx,%eax
30: e9 f7 fe ff ff jmp 0xffffff2c
35: 89 d9 mov %ebx,%ecx
37: 80 e1 07 and $0x7,%cl
3a: fe c1 inc %cl
3c: 38 c1 cmp %al,%cl
3e: 0f .byte 0xf