program: mkdirat(0xffffffffffffff9c, &(0x7f0000000000)='./debug\x00', 0x1ff) mount(&(0x7f0000000100)=@filename='none\x00', &(0x7f0000000200)='./debug\x00', &(0x7f0000000300)='debugfs\x00', 0x0, &(0x7f0000000400)='\x00') (async) r0 = openat(0xffffffffffffff9c, &(0x7f0000000000)='./debug/failslab/task-filter\x00', 0x1, 0x0) write(r0, &(0x7f0000000100)='N\x00', 0x1) (async) r1 = openat(0xffffffffffffff9c, &(0x7f0000000000)='./debug/failslab/probability\x00', 0x1, 0x0) write(r1, &(0x7f0000000100)='100\x00', 0x3) (async) r2 = socket$netlink(0x10, 0x3, 0x0) sendmsg$nl_route_sched(r2, &(0x7f00000002c0)={0x0, 0x0, &(0x7f0000000280)={&(0x7f0000000640)=@newtaction={0x6c, 0x30, 0x48b, 0x0, 0x0, {}, [{0x58, 0x1, [@m_nat={0x54, 0x1, 0x0, 0x0, {{0x8}, {0x2c, 0x2, 0x0, 0x1, [@TCA_NAT_PARMS={0x28, 0x1, {{0x8, 0x3defad41, 0x2000000e, 0x6, 0x8}, @remote, @multicast2, 0xff}}]}, {0x4}, {0xc}, {0xc}}}]}]}, 0x6c}}, 0x0) r3 = openat(0xffffffffffffff9c, &(0x7f0000000000)='./debug/failslab/times\x00', 0x1, 0x0) write(r3, &(0x7f0000000100)='10\x00', 0x2) (async, rerun: 32) r4 = socket$unix(0x1, 0x1, 0x0) (rerun: 32) ioctl$sock_SIOCGIFINDEX(r4, 0x8933, &(0x7f0000000100)={'lo\x00', 0x0}) r6 = socket$netlink(0x10, 0x3, 0x0) sendmsg$nl_route_sched(r6, &(0x7f0000000000)={0x0, 0x0, &(0x7f0000000580)={&(0x7f00000005c0)=@newqdisc={0x2c, 0x24, 0x605, 0x1, 0x0, {0x0, 0x0, 0x0, r5, {}, {0xffff, 0xffff}, {0x1}}, [@qdisc_kind_options=@q_sfb={{0x8}, {0x2c, 0x2, @TCA_SFB_PARMS={0x28, 0x1, {0x3e8}}}}]}, 0x134}}, 0x0) [ 122.680693][ T803] FAULT_INJECTION: forcing a failure. [ 122.680693][ T803] name failslab, interval 1, probability 100, space 0, times 1 [ 122.686360][ T5318] FAULT_INJECTION: forcing a failure. [ 122.686360][ T5318] name failslab, interval 1, probability 100, space 0, times 1 [ 122.691811][ T1359] FAULT_INJECTION: forcing a failure. [ 122.691811][ T1359] name failslab, interval 1, probability 100, space 0, times 1 [ 122.698256][ T4988] FAULT_INJECTION: forcing a failure. [ 122.698256][ T4988] name failslab, interval 1, probability 100, space 0, times 1 [ 122.703947][ T24] FAULT_INJECTION: forcing a failure. [ 122.703947][ T24] name failslab, interval 1, probability 100, space 0, times 1 [ 122.709528][ T24] CPU: 0 UID: 0 PID: 24 Comm: kworker/u4:2 Not tainted syzkaller #0 PREEMPT(full) [ 122.709539][ T24] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 122.709545][ T24] Workqueue: ipv6_addrconf addrconf_dad_work [ 122.709627][ T24] Call Trace: [ 122.709631][ T24] [ 122.709635][ T24] dump_stack_lvl+0xe8/0x150 [ 122.709647][ T24] should_fail_ex+0x40c/0x560 [ 122.709686][ T24] should_failslab+0xa8/0x100 [ 122.709696][ T24] kmem_cache_alloc_noprof+0xa6/0x5f0 [ 122.709709][ T24] ? fib6_add_1+0x996/0x13e0 [ 122.709719][ T24] ? fib6_add_1+0x996/0x13e0 [ 122.709731][ T24] fib6_add_1+0x996/0x13e0 [ 122.709745][ T24] fib6_add+0x211/0x1a20 [ 122.709760][ T24] ? __pfx_fib6_add+0x10/0x10 [ 122.709770][ T24] ? consume_skb+0x89/0xb0 [ 122.709782][ T24] ? ip6_ins_rt+0xc0/0x140 [ 122.709792][ T24] ip6_ins_rt+0xd6/0x140 [ 122.709801][ T24] ? __pfx_ip6_ins_rt+0x10/0x10 [ 122.709812][ T24] ? nlmsg_notify+0xe3/0x1a0 [ 122.709819][ T24] ? nlmsg_notify+0x142/0x1a0 [ 122.709826][ T24] __ipv6_ifa_notify+0x4e8/0xc60 [ 122.709840][ T24] ? __pfx___ipv6_ifa_notify+0x10/0x10 [ 122.709852][ T24] ? __cancel_work+0x17f/0x230 [ 122.709861][ T24] ? lockdep_hardirqs_on+0x7a/0x110 [ 122.709873][ T24] addrconf_dad_completed+0x1a1/0xe60 [ 122.709885][ T24] ? __pfx_addrconf_dad_completed+0x10/0x10 [ 122.709894][ T24] ? addrconf_dad_work+0xe57/0x15c0 [ 122.709904][ T24] ? __local_bh_enable_ip+0xd0/0x130 [ 122.709914][ T24] addrconf_dad_work+0xcf8/0x15c0 [ 122.709926][ T24] ? __pfx_addrconf_dad_work+0x10/0x10 [ 122.709935][ T24] ? process_scheduled_works+0xa20/0x14e0 [ 122.709945][ T24] ? rcu_is_watching+0x15/0xb0 [ 122.709957][ T24] ? process_scheduled_works+0xa20/0x14e0 [ 122.709964][ T24] process_scheduled_works+0xa8e/0x14e0 [ 122.709986][ T24] ? __pfx_process_scheduled_works+0x10/0x10 [ 122.709996][ T24] ? assign_work+0x3cf/0x5d0 [ 122.710005][ T24] worker_thread+0xa47/0xfb0 [ 122.710017][ T24] ? __kthread_parkme+0x71/0x1f0 [ 122.710028][ T24] kthread+0x388/0x470 [ 122.710038][ T24] ? __pfx_worker_thread+0x10/0x10 [ 122.710045][ T24] ? __pfx_kthread+0x10/0x10 [ 122.710055][ T24] ret_from_fork+0x514/0xb70 [ 122.710066][ T24] ? __pfx_ret_from_fork+0x10/0x10 [ 122.710075][ T24] ? __switch_to+0xc89/0x1420 [ 122.710085][ T24] ? __pfx_kthread+0x10/0x10 [ 122.710094][ T24] ret_from_fork_asm+0x1a/0x30 [ 122.710110][ T24] [ 122.805319][ T1359] CPU: 0 UID: 0 PID: 1359 Comm: kworker/0:3 Not tainted syzkaller #0 PREEMPT(full) [ 122.805332][ T1359] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 122.805338][ T1359] Workqueue: events nsim_fib_event_work [ 122.805352][ T1359] Call Trace: [ 122.805355][ T1359] [ 122.805359][ T1359] dump_stack_lvl+0xe8/0x150 [ 122.805371][ T1359] should_fail_ex+0x40c/0x560 [ 122.805386][ T1359] should_failslab+0xa8/0x100 [ 122.805397][ T1359] __kmalloc_cache_noprof+0xa8/0x660 [ 122.805405][ T1359] ? stack_depot_save_flags+0x33/0x800 [ 122.805412][ T1359] ? nsim_fib_event+0xf37/0xa390 [ 122.805421][ T1359] ? nsim_fib_event+0xf37/0xa390 [ 122.805435][ T1359] nsim_fib_event+0xf37/0xa390 [ 122.805446][ T1359] ? worker_thread+0xa47/0xfb0 [ 122.805458][ T1359] ? kthread+0x388/0x470 [ 122.805487][ T1359] ? __pfx_nsim_fib_event+0x10/0x10 [ 122.805509][ T1359] ? kasan_quarantine_put+0xbb/0x1f0 [ 122.805531][ T1359] nsim_fib_event_work+0x244/0x3b0 [ 122.805546][ T1359] ? __pfx_nsim_fib_event_work+0x10/0x10 [ 122.805560][ T1359] ? rcu_is_watching+0x15/0xb0 [ 122.805580][ T1359] ? process_scheduled_works+0xa20/0x14e0 [ 122.805592][ T1359] process_scheduled_works+0xa8e/0x14e0 [ 122.805622][ T1359] ? __pfx_process_scheduled_works+0x10/0x10 [ 122.805639][ T1359] ? assign_work+0x3cf/0x5d0 [ 122.805653][ T1359] worker_thread+0xa47/0xfb0 [ 122.805674][ T1359] ? __kthread_parkme+0x71/0x1f0 [ 122.805693][ T1359] kthread+0x388/0x470 [ 122.805709][ T1359] ? __pfx_worker_thread+0x10/0x10 [ 122.805720][ T1359] ? __pfx_kthread+0x10/0x10 [ 122.805736][ T1359] ret_from_fork+0x514/0xb70 [ 122.805754][ T1359] ? __pfx_ret_from_fork+0x10/0x10 [ 122.805769][ T1359] ? __switch_to+0xc89/0x1420 [ 122.805784][ T1359] ? __pfx_kthread+0x10/0x10 [ 122.805800][ T1359] ret_from_fork_asm+0x1a/0x30 [ 122.805826][ T1359] [ 122.806081][ T4988] CPU: 0 UID: 0 PID: 4988 Comm: dhcpcd Not tainted syzkaller #0 PREEMPT(full) [ 122.806094][ T4988] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 122.806100][ T4988] Call Trace: [ 122.806105][ T4988] [ 122.806109][ T4988] dump_stack_lvl+0xe8/0x150 [ 122.806125][ T4988] should_fail_ex+0x40c/0x560 [ 122.806146][ T4988] should_failslab+0xa8/0x100 [ 122.806161][ T4988] kmem_cache_alloc_noprof+0xa6/0x5f0 [ 122.806179][ T4988] ? trace_kmem_cache_alloc+0x29/0xe0 [ 122.806190][ T4988] ? anon_vma_fork+0x88/0x540 [ 122.806200][ T4988] ? anon_vma_fork+0x88/0x540 [ 122.806213][ T4988] anon_vma_fork+0x88/0x540 [ 122.806223][ T4988] ? anon_vma_name+0x61/0x210 [ 122.806236][ T4988] ? dup_userfaultfd+0xa7/0x610 [ 122.806269][ T4988] ? dup_mmap+0x89a/0x1d90 [ 122.806306][ T4988] dup_mmap+0x970/0x1d90 [ 122.806329][ T4988] ? __pfx_dup_mmap+0x10/0x10 [ 122.806338][ T4988] ? do_raw_spin_lock+0x12b/0x2f0 [ 122.806357][ T4988] ? copy_mm+0x10f/0x480 [ 122.806371][ T4988] ? copy_mm+0x10f/0x480 [ 122.806391][ T4988] copy_mm+0x11a/0x480 [ 122.806404][ T4988] ? copy_process+0xd3c/0x4390 [ 122.806415][ T4988] copy_process+0x1e3e/0x4390 [ 122.806432][ T4988] ? copy_process+0xd3c/0x4390 [ 122.806455][ T4988] ? __pfx_copy_process+0x10/0x10 [ 122.806475][ T4988] kernel_clone+0x2d7/0x940 [ 122.806492][ T4988] ? __pfx_kernel_clone+0x10/0x10 [ 122.806516][ T4988] __x64_sys_clone+0x1b6/0x230 [ 122.806532][ T4988] ? __pfx___x64_sys_clone+0x10/0x10 [ 122.806560][ T4988] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 122.806573][ T4988] do_syscall_64+0x174/0x580 [ 122.806587][ T4988] ? trace_irq_disable+0x3b/0x140 [ 122.806601][ T4988] ? clear_bhb_loop+0x70/0xc0 [ 122.806615][ T4988] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 122.806627][ T4988] RIP: 0033:0x7fe09d185636 [ 122.806639][ T4988] Code: 89 df e8 6d e8 f6 ff 45 31 c0 31 d2 31 f6 64 48 8b 04 25 10 00 00 00 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 52 89 c5 85 c0 75 31 64 48 8b 04 25 10 00 00 [ 122.806649][ T4988] RSP: 002b:00007ffd25c18ac0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 [ 122.806660][ T4988] RAX: ffffffffffffffda RBX: 00007ffd25c18ac8 RCX: 00007fe09d185636 [ 122.806668][ T4988] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 [ 122.806675][ T4988] RBP: 00007ffd25c39010 R08: 0000000000000000 R09: 0000000000000001 [ 122.806682][ T4988] R10: 00007fe09d0b1a50 R11: 0000000000000246 R12: 00007ffd25c18c00 [ 122.806689][ T4988] R13: 0000000000000000 R14: 0000000000000000 R15: 000055cdd40b6ac0 [ 122.806705][ T4988] [ 122.806766][ T803] CPU: 0 UID: 0 PID: 803 Comm: kworker/0:2 Not tainted syzkaller #0 PREEMPT(full) [ 122.806779][ T803] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 122.806786][ T803] Workqueue: events drm_fb_helper_damage_work [ 122.806804][ T803] Call Trace: [ 122.806809][ T803] [ 122.806813][ T803] dump_stack_lvl+0xe8/0x150 [ 122.806829][ T803] should_fail_ex+0x40c/0x560 [ 122.806850][ T803] should_failslab+0xa8/0x100 [ 122.806865][ T803] __kmalloc_cache_noprof+0xa8/0x660 [ 122.806877][ T803] ? drm_atomic_commit_alloc+0xa9/0x100 [ 122.806893][ T803] ? drm_atomic_commit_alloc+0xa9/0x100 [ 122.806914][ T803] drm_atomic_commit_alloc+0xa9/0x100 [ 122.806932][ T803] drm_atomic_helper_dirtyfb+0x129/0xfd0 [ 122.806949][ T803] ? __lock_acquire+0x683/0x2cf0 [ 122.806973][ T803] ? __pfx_drm_atomic_helper_dirtyfb+0x10/0x10 [ 122.806997][ T803] ? do_raw_spin_lock+0x12b/0x2f0 [ 122.807017][ T803] drm_fbdev_shmem_helper_fb_dirty+0x160/0x310 [ 122.807035][ T803] drm_fb_helper_damage_work+0x84c/0xf20 [ 122.807057][ T803] ? __pfx_drm_fb_helper_damage_work+0x10/0x10 [ 122.807085][ T803] ? process_scheduled_works+0xa20/0x14e0 [ 122.807101][ T803] ? rcu_is_watching+0x15/0xb0 [ 122.807119][ T803] ? process_scheduled_works+0xa20/0x14e0 [ 122.807131][ T803] process_scheduled_works+0xa8e/0x14e0 [ 122.807158][ T803] ? __pfx_process_scheduled_works+0x10/0x10 [ 122.807175][ T803] ? assign_work+0x3cf/0x5d0 [ 122.807189][ T803] worker_thread+0xa47/0xfb0 [ 122.807211][ T803] ? __kthread_parkme+0x71/0x1f0 [ 122.807230][ T803] kthread+0x388/0x470 [ 122.807245][ T803] ? __pfx_worker_thread+0x10/0x10 [ 122.807256][ T803] ? __pfx_kthread+0x10/0x10 [ 122.807272][ T803] ret_from_fork+0x514/0xb70 [ 122.807290][ T803] ? __pfx_ret_from_fork+0x10/0x10 [ 122.807305][ T803] ? __switch_to+0xc89/0x1420 [ 122.807320][ T803] ? __pfx_kthread+0x10/0x10 [ 122.807335][ T803] ret_from_fork_asm+0x1a/0x30 [ 122.807380][ T803] [ 122.807445][ T5318] CPU: 0 UID: 0 PID: 5318 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) [ 122.807458][ T5318] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 122.807464][ T5318] Call Trace: [ 122.807468][ T5318] [ 122.807472][ T5318] dump_stack_lvl+0xe8/0x150 [ 122.807488][ T5318] should_fail_ex+0x40c/0x560 [ 122.807507][ T5318] should_failslab+0xa8/0x100 [ 122.807521][ T5318] kmem_cache_alloc_node_noprof+0xb3/0x610 [ 122.807532][ T5318] ? local_lock_release+0x9c/0x160 [ 122.807548][ T5318] ? __alloc_skb+0x1d7/0x7a0 [ 122.807561][ T5318] ? __alloc_skb+0x1d7/0x7a0 [ 122.807579][ T5318] __alloc_skb+0x1d7/0x7a0 [ 122.807596][ T5318] netlink_sendmsg+0x5d4/0xb40 [ 122.807615][ T5318] ? __pfx_netlink_sendmsg+0x10/0x10 [ 122.807629][ T5318] ? aa_sock_msg_perm+0xf1/0x1b0 [ 122.807648][ T5318] ? __pfx_netlink_sendmsg+0x10/0x10 [ 122.807658][ T5318] sock_sendmsg_nosec+0x13a/0x180 [ 122.807675][ T5318] ____sys_sendmsg+0x54e/0x850 [ 122.807694][ T5318] ? __pfx_____sys_sendmsg+0x10/0x10 [ 122.807716][ T5318] ? import_iovec+0x73/0xa0 [ 122.807732][ T5318] ___sys_sendmsg+0x2a5/0x360 [ 122.807748][ T5318] ? __lock_acquire+0x683/0x2cf0 [ 122.807764][ T5318] ? __pfx____sys_sendmsg+0x10/0x10 [ 122.807783][ T5318] ? futex_wait+0x2a2/0x390 [ 122.807810][ T5318] ? __fget_files+0x2a/0x420 [ 122.807822][ T5318] ? __fget_files+0x3a2/0x420 [ 122.807839][ T5318] __x64_sys_sendmsg+0x1b1/0x290 [ 122.807858][ T5318] ? __pfx___x64_sys_sendmsg+0x10/0x10 [ 122.807883][ T5318] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 122.807896][ T5318] do_syscall_64+0x174/0x580 [ 122.807911][ T5318] ? clear_bhb_loop+0x70/0xc0 [ 122.807924][ T5318] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 122.807935][ T5318] RIP: 0033:0x7fa92cf9e0d9 [ 122.807946][ T5318] Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 [ 122.807954][ T5318] RSP: 002b:00007fa92df00fe8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 122.807965][ T5318] RAX: ffffffffffffffda RBX: 00007fa92d225fa0 RCX: 00007fa92cf9e0d9 [ 122.807979][ T5318] RDX: 0000000000000000 RSI: 00002000000002c0 RDI: 0000000000000005 [ 122.807986][ T5318] RBP: 00007fa92d035024 R08: 0000000000000000 R09: 0000000000000000 [ 122.807992][ T5318] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 122.807998][ T5318] R13: 00007fa92d226038 R14: 00007fa92d225fa0 R15: 00007fffb842ede8 [ 122.808015][ T5318] [ 122.808244][ T803] ------------[ cut here ]------------ [ 123.161199][ T803] virtio-pci 0000:00:01.0: [drm] Dirty helper failed: ret=-12 [ 123.164431][ T803] WARNING: drivers/gpu/drm/drm_fbdev_shmem.c:118 at drm_fbdev_shmem_helper_fb_dirty+0x1e1/0x310, CPU#0: kworker/0:2/803 [ 123.169517][ T803] Modules linked in: [ 123.172111][ T803] CPU: 0 UID: 0 PID: 803 Comm: kworker/0:2 Not tainted syzkaller #0 PREEMPT(full) [ 123.176000][ T803] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 123.180364][ T803] Workqueue: events drm_fb_helper_damage_work [ 123.183045][ T803] RIP: 0010:drm_fbdev_shmem_helper_fb_dirty+0x288/0x310 [ 123.185928][ T803] Code: 35 fc 4c 89 f8 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 ff e8 5a 5a a4 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 [ 123.193995][ T803] RSP: 0018:ffffc90003e3f8b8 EFLAGS: 00010246 [ 123.196472][ T803] RAX: 1ffff11003f1001a RBX: 00000000fffffff4 RCX: 00000000fffffff4 [ 123.199653][ T803] RDX: ffff88801f645de0 RSI: ffffffff8c57c700 RDI: ffffffff90638de0 [ 123.202382][ T803] RBP: ffff88801d36e008 R08: 0000000000000dc0 R09: 00000000ffffffff [ 123.205334][ T803] R10: dffffc0000000000 R11: fffffbfff1d94963 R12: ffff88801f645de0 [ 123.208342][ T803] R13: dffffc0000000000 R14: ffffffff8c57c700 R15: ffff88801f8800d0 [ 123.211226][ T803] FS: 0000000000000000(0000) GS:ffff88808c549000(0000) knlGS:0000000000000000 [ 123.214854][ T803] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 123.217605][ T803] CR2: 00007fa92d1afe70 CR3: 0000000012d44000 CR4: 0000000000352ef0 [ 123.221677][ T803] Call Trace: [ 123.223078][ T803] [ 123.224249][ T803] drm_fb_helper_damage_work+0x84c/0xf20 [ 123.226634][ T803] ? __pfx_drm_fb_helper_damage_work+0x10/0x10 [ 123.229325][ T803] ? process_scheduled_works+0xa20/0x14e0 [ 123.231824][ T803] ? rcu_is_watching+0x15/0xb0 [ 123.233828][ T803] ? process_scheduled_works+0xa20/0x14e0 [ 123.236252][ T803] process_scheduled_works+0xa8e/0x14e0 [ 123.238670][ T803] ? __pfx_process_scheduled_works+0x10/0x10 [ 123.241181][ T803] ? assign_work+0x3cf/0x5d0 [ 123.242891][ T803] worker_thread+0xa47/0xfb0 [ 123.244485][ T803] ? __kthread_parkme+0x71/0x1f0 [ 123.246172][ T803] kthread+0x388/0x470 [ 123.247738][ T803] ? __pfx_worker_thread+0x10/0x10 [ 123.249794][ T803] ? __pfx_kthread+0x10/0x10 [ 123.251727][ T803] ret_from_fork+0x514/0xb70 [ 123.253634][ T803] ? __pfx_ret_from_fork+0x10/0x10 [ 123.255742][ T803] ? __switch_to+0xc89/0x1420 [ 123.257944][ T803] ? __pfx_kthread+0x10/0x10 [ 123.259851][ T803] ret_from_fork_asm+0x1a/0x30 [ 123.262089][ T803] [ 123.263290][ T803] Kernel panic - not syncing: kernel: panic_on_warn set ... [ 123.266301][ T803] CPU: 0 UID: 0 PID: 803 Comm: kworker/0:2 Not tainted syzkaller #0 PREEMPT(full) [ 123.269852][ T803] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 123.273740][ T803] Workqueue: events drm_fb_helper_damage_work [ 123.276350][ T803] Call Trace: [ 123.277783][ T803] [ 123.279052][ T803] vpanic+0x56c/0xa60 [ 123.280745][ T803] ? __pfx__printk+0x10/0x10 [ 123.282708][ T803] ? __pfx_vpanic+0x10/0x10 [ 123.284669][ T803] ? is_bpf_text_address+0x292/0x2b0 [ 123.286945][ T803] ? is_bpf_text_address+0x26/0x2b0 [ 123.289193][ T803] panic+0xc5/0xd0 [ 123.290914][ T803] ? __pfx_panic+0x10/0x10 [ 123.292823][ T803] ? ret_from_fork_asm+0x1a/0x30 [ 123.294826][ T803] __warn+0x315/0x4c0 [ 123.296448][ T803] ? drm_fbdev_shmem_helper_fb_dirty+0x1e1/0x310 [ 123.298953][ T803] ? drm_fbdev_shmem_helper_fb_dirty+0x1e1/0x310 [ 123.301443][ T803] __report_bug+0x276/0x570 [ 123.303446][ T803] ? drm_modeset_acquire_fini+0x27/0x180 [ 123.305855][ T803] ? drm_fbdev_shmem_helper_fb_dirty+0x1e1/0x310 [ 123.308562][ T803] ? __pfx___report_bug+0x10/0x10 [ 123.310688][ T803] ? drm_atomic_helper_dirtyfb+0xf27/0xfd0 [ 123.313173][ T803] ? __pfx_drm_atomic_helper_dirtyfb+0x10/0x10 [ 123.315808][ T803] report_bug_entry+0x19a/0x290 [ 123.317963][ T803] ? drm_fbdev_shmem_helper_fb_dirty+0x288/0x310 [ 123.320643][ T803] ? drm_fbdev_shmem_helper_fb_dirty+0x28d/0x310 [ 123.323321][ T803] handle_bug+0xce/0x200 [ 123.325227][ T803] exc_invalid_op+0x1a/0x50 [ 123.327169][ T803] asm_exc_invalid_op+0x1a/0x20 [ 123.329298][ T803] RIP: 0010:drm_fbdev_shmem_helper_fb_dirty+0x288/0x310 [ 123.332203][ T803] Code: 35 fc 4c 89 f8 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 ff e8 5a 5a a4 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 [ 123.340302][ T803] RSP: 0018:ffffc90003e3f8b8 EFLAGS: 00010246 [ 123.342875][ T803] RAX: 1ffff11003f1001a RBX: 00000000fffffff4 RCX: 00000000fffffff4 [ 123.346186][ T803] RDX: ffff88801f645de0 RSI: ffffffff8c57c700 RDI: ffffffff90638de0 [ 123.349522][ T803] RBP: ffff88801d36e008 R08: 0000000000000dc0 R09: 00000000ffffffff [ 123.352864][ T803] R10: dffffc0000000000 R11: fffffbfff1d94963 R12: ffff88801f645de0 [ 123.356977][ T803] R13: dffffc0000000000 R14: ffffffff8c57c700 R15: ffff88801f8800d0 [ 123.360530][ T803] ? drm_fbdev_shmem_helper_fb_dirty+0x260/0x310 [ 123.363296][ T803] drm_fb_helper_damage_work+0x84c/0xf20 [ 123.365711][ T803] ? __pfx_drm_fb_helper_damage_work+0x10/0x10 [ 123.368381][ T803] ? process_scheduled_works+0xa20/0x14e0 [ 123.370818][ T803] ? rcu_is_watching+0x15/0xb0 [ 123.372853][ T803] ? process_scheduled_works+0xa20/0x14e0 [ 123.375256][ T803] process_scheduled_works+0xa8e/0x14e0 [ 123.377639][ T803] ? __pfx_process_scheduled_works+0x10/0x10 [ 123.380201][ T803] ? assign_work+0x3cf/0x5d0 [ 123.382169][ T803] worker_thread+0xa47/0xfb0 [ 123.384183][ T803] ? __kthread_parkme+0x71/0x1f0 [ 123.386320][ T803] kthread+0x388/0x470 [ 123.388102][ T803] ? __pfx_worker_thread+0x10/0x10 [ 123.390352][ T803] ? __pfx_kthread+0x10/0x10 [ 123.392274][ T803] ret_from_fork+0x514/0xb70 [ 123.394210][ T803] ? __pfx_ret_from_fork+0x10/0x10 [ 123.396422][ T803] ? __switch_to+0xc89/0x1420 [ 123.398472][ T803] ? __pfx_kthread+0x10/0x10 [ 123.400449][ T803] ret_from_fork_asm+0x1a/0x30 [ 123.402523][ T803] [ 123.404306][ T803] Kernel Offset: disabled [ 123.406180][ T803] Rebooting in 86400 seconds..