[ 6.138753][ T23] audit: type=1400 audit(1635518663.219:70): avc: denied { read } for pid=255 comm="getty" name="log" dev="sda1" ino=1125 scontext=system_u:system_r:getty_t tcontext=system_u:object_r:var_t tclass=lnk_file permissive=1 syzkaller syzkaller login: [ 6.432633][ T0] NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #08!!! [ 13.860312][ T23] audit: type=1400 audit(1635518670.959:71): avc: denied { transition } for pid=290 comm="sshd" path="/bin/sh" dev="sda1" ino=73 scontext=system_u:system_r:initrc_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 13.865064][ T23] audit: type=1400 audit(1635518670.969:72): avc: denied { write } for pid=290 comm="sh" path="pipe:[11528]" dev="pipefs" ino=11528 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:initrc_t tclass=fifo_file permissive=1 [ 14.033348][ T0] NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #282!!! [ 14.797286][ T0] NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #80!!! Warning: Permanently added '10.128.0.89' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 20.767294][ T23] audit: type=1400 audit(1635518677.869:73): avc: denied { execmem } for pid=365 comm="syz-executor631" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 20.914278][ T546] ================================================================== [ 20.922474][ T546] BUG: KASAN: null-ptr-deref in _raw_spin_lock_irqsave+0xeb/0x210 [ 20.930304][ T546] Write of size 4 at addr 0000000000000010 by task syz-executor631/546 [ 20.938622][ T546] [ 20.940933][ T546] CPU: 1 PID: 546 Comm: syz-executor631 Not tainted 5.10.76-syzkaller-01178-g4944ec82ebb9 #0 [ 20.951048][ T546] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 20.961081][ T546] Call Trace: [ 20.964358][ T546] dump_stack_lvl+0x1e2/0x24b [ 20.969010][ T546] ? devkmsg_release+0x127/0x127 [ 20.973923][ T546] ? show_regs_print_info+0x18/0x18 [ 20.979097][ T546] ? __kasan_check_write+0x14/0x20 [ 20.984291][ T546] ? _raw_spin_lock_irqsave+0xf8/0x210 [ 20.989728][ T546] ? _raw_spin_lock+0x1b0/0x1b0 [ 20.994552][ T546] __kasan_report+0x138/0x220 [ 20.999200][ T546] ? _raw_spin_lock_irqsave+0xeb/0x210 [ 21.004628][ T546] kasan_report+0x51/0x70 [ 21.008936][ T546] kasan_check_range+0x2b6/0x2f0 [ 21.013865][ T546] __kasan_check_write+0x14/0x20 [ 21.018773][ T546] _raw_spin_lock_irqsave+0xeb/0x210 [ 21.024046][ T546] ? _raw_spin_lock+0x1b0/0x1b0 [ 21.028877][ T546] ? io_wq_cancel_cb+0x88a/0x9f0 [ 21.033787][ T546] ? __kasan_check_write+0x14/0x20 [ 21.038867][ T546] ? _raw_spin_lock_irq+0xa4/0x1b0 [ 21.043946][ T546] prepare_to_wait+0x9c/0x290 [ 21.048603][ T546] ? __kasan_check_write+0x14/0x20 [ 21.053692][ T546] ? __wake_up_sync+0x10/0x10 [ 21.058358][ T546] ? io_poll_remove_all+0x1f1/0x210 [ 21.063525][ T546] io_uring_cancel_task_requests+0x16a9/0x1ed0 [ 21.069659][ T546] ? __io_uring_files_cancel+0x350/0x350 [ 21.075279][ T546] ? mutex_lock+0xa6/0x110 [ 21.079668][ T546] ? io_schedule+0x120/0x120 [ 21.084230][ T546] io_uring_flush+0x170/0x6d0 [ 21.088877][ T546] ? fput_many+0x47/0x1a0 [ 21.093189][ T546] ? io_uring_mmap+0x360/0x360 [ 21.097920][ T546] filp_close+0xb0/0x150 [ 21.102131][ T546] put_files_struct+0x1d4/0x350 [ 21.106953][ T546] exit_files+0x80/0xa0 [ 21.111085][ T546] do_exit+0x6d9/0x23a0 [ 21.115211][ T546] ? __kasan_check_write+0x14/0x20 [ 21.120288][ T546] ? unlock_page+0x75/0xa0 [ 21.124685][ T546] ? mm_update_next_owner+0x6e0/0x6e0 [ 21.130026][ T546] ? __kasan_check_write+0x14/0x20 [ 21.135111][ T546] ? _raw_spin_lock_irq+0xa4/0x1b0 [ 21.140207][ T546] do_group_exit+0x16a/0x2d0 [ 21.144774][ T546] get_signal+0x133e/0x1f80 [ 21.149247][ T546] ? ptrace_notify+0x340/0x340 [ 21.153979][ T546] ? get_timespec64+0x18a/0x260 [ 21.158795][ T546] ? _raw_read_unlock+0x25/0x40 [ 21.163615][ T546] ? timespec64_add_safe+0x220/0x220 [ 21.168867][ T546] ? put_vma+0x43/0xa0 [ 21.172904][ T546] arch_do_signal+0x8d/0x620 [ 21.177461][ T546] ? __do_sys_rt_sigreturn+0x1e0/0x1e0 [ 21.182893][ T546] ? debug_smp_processor_id+0x1c/0x20 [ 21.188235][ T546] exit_to_user_mode_prepare+0xaa/0xe0 [ 21.193678][ T546] syscall_exit_to_user_mode+0x24/0x40 [ 21.199106][ T546] do_syscall_64+0x3d/0x70 [ 21.203494][ T546] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 21.209354][ T546] RIP: 0033:0x7fc6d1589a89 [ 21.213738][ T546] Code: Unable to access opcode bytes at RIP 0x7fc6d1589a5f. [ 21.221076][ T546] RSP: 002b:00007ffd2b5da728 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 21.229476][ T546] RAX: fffffffffffffdfc RBX: 0000000000005193 RCX: 00007fc6d1589a89 [ 21.237422][ T546] RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fc6d161142c [ 21.245373][ T546] RBP: 0000000000000032 R08: 00007ffd2b5eb0b8 R09: 0000000000000000 [ 21.253320][ T546] R10: 00007ffd2b5da750 R11: 0000000000000246 R12: 00007fc6d161142c [ 21.261265][ T546] R13: 00007ffd2b5da750 R14: 00007ffd2b5da770 R15: 0000000000000000 [ 21.269208][ T546] ================================================================== [ 21.277239][ T546] Disabling lock debugging due to kernel taint [ 21.283367][ T546] BUG: kernel NULL pointer dereference, address: 0000000000000010 [ 21.291136][ T546] #PF: supervisor write access in kernel mode [ 21.297170][ T546] #PF: error_code(0x0002) - not-present page [ 21.303116][ T546] PGD 0 P4D 0 [ 21.306465][ T546] Oops: 0002 [#1] PREEMPT SMP KASAN [ 21.311633][ T546] CPU: 1 PID: 546 Comm: syz-executor631 Tainted: G B 5.10.76-syzkaller-01178-g4944ec82ebb9 #0 [ 21.323152][ T546] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 21.333187][ T546] RIP: 0010:_raw_spin_lock_irqsave+0x10d/0x210 [ 21.339357][ T546] Code: 00 00 00 e8 d5 29 09 fd 4c 89 e7 be 04 00 00 00 e8 c8 29 09 fd 42 8a 04 3b 84 c0 0f 85 be 00 00 00 8b 44 24 40 b9 01 00 00 00 41 0f b1 4d 00 75 45 48 c7 44 24 20 0e 36 e0 45 4b c7 04 37 00 [ 21.358946][ T546] RSP: 0018:ffffc90000f174e0 EFLAGS: 00010097 [ 21.364988][ T546] RAX: 0000000000000000 RBX: 1ffff920001e2ea4 RCX: 0000000000000001 [ 21.372934][ T546] RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffc90000f17520 [ 21.380877][ T546] RBP: ffffc90000f175b0 R08: dffffc0000000000 R09: 0000000000000003 [ 21.388832][ T546] R10: fffff520001e2ea5 R11: 0000000000000004 R12: ffffc90000f17520 [ 21.396773][ T546] R13: 0000000000000010 R14: 1ffff920001e2ea0 R15: dffffc0000000000 [ 21.404717][ T546] FS: 0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 [ 21.413628][ T546] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 21.420191][ T546] CR2: 0000000000000010 CR3: 000000000640f000 CR4: 00000000003506a0 [ 21.428136][ T546] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 21.436078][ T546] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 21.444024][ T546] Call Trace: [ 21.447301][ T546] ? _raw_spin_lock+0x1b0/0x1b0 [ 21.452122][ T546] ? io_wq_cancel_cb+0x88a/0x9f0 [ 21.457032][ T546] ? __kasan_check_write+0x14/0x20 [ 21.462111][ T546] ? _raw_spin_lock_irq+0xa4/0x1b0 [ 21.467192][ T546] prepare_to_wait+0x9c/0x290 [ 21.471853][ T546] ? __kasan_check_write+0x14/0x20 [ 21.476947][ T546] ? __wake_up_sync+0x10/0x10 [ 21.481610][ T546] ? io_poll_remove_all+0x1f1/0x210 [ 21.486820][ T546] io_uring_cancel_task_requests+0x16a9/0x1ed0 [ 21.492959][ T546] ? __io_uring_files_cancel+0x350/0x350 [ 21.498641][ T546] ? mutex_lock+0xa6/0x110 [ 21.503058][ T546] ? io_schedule+0x120/0x120 [ 21.507678][ T546] io_uring_flush+0x170/0x6d0 [ 21.512334][ T546] ? fput_many+0x47/0x1a0 [ 21.516635][ T546] ? io_uring_mmap+0x360/0x360 [ 21.521377][ T546] filp_close+0xb0/0x150 [ 21.525594][ T546] put_files_struct+0x1d4/0x350 [ 21.530417][ T546] exit_files+0x80/0xa0 [ 21.534548][ T546] do_exit+0x6d9/0x23a0 [ 21.538677][ T546] ? __kasan_check_write+0x14/0x20 [ 21.543755][ T546] ? unlock_page+0x75/0xa0 [ 21.548141][ T546] ? mm_update_next_owner+0x6e0/0x6e0 [ 21.553599][ T546] ? __kasan_check_write+0x14/0x20 [ 21.558695][ T546] ? _raw_spin_lock_irq+0xa4/0x1b0 [ 21.563833][ T546] do_group_exit+0x16a/0x2d0 [ 21.568403][ T546] get_signal+0x133e/0x1f80 [ 21.572884][ T546] ? ptrace_notify+0x340/0x340 [ 21.577629][ T546] ? get_timespec64+0x18a/0x260 [ 21.582455][ T546] ? _raw_read_unlock+0x25/0x40 [ 21.587289][ T546] ? timespec64_add_safe+0x220/0x220 [ 21.592550][ T546] ? put_vma+0x43/0xa0 [ 21.596653][ T546] arch_do_signal+0x8d/0x620 [ 21.601228][ T546] ? __do_sys_rt_sigreturn+0x1e0/0x1e0 [ 21.606705][ T546] ? debug_smp_processor_id+0x1c/0x20 [ 21.612053][ T546] exit_to_user_mode_prepare+0xaa/0xe0 [ 21.617494][ T546] syscall_exit_to_user_mode+0x24/0x40 [ 21.622933][ T546] do_syscall_64+0x3d/0x70 [ 21.627322][ T546] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 21.633186][ T546] RIP: 0033:0x7fc6d1589a89 [ 21.637702][ T546] Code: Unable to access opcode bytes at RIP 0x7fc6d1589a5f. [ 21.645046][ T546] RSP: 002b:00007ffd2b5da728 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 21.653441][ T546] RAX: fffffffffffffdfc RBX: 0000000000005193 RCX: 00007fc6d1589a89 [ 21.661436][ T546] RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fc6d161142c [ 21.669385][ T546] RBP: 0000000000000032 R08: 00007ffd2b5eb0b8 R09: 0000000000000000 [ 21.677332][ T546] R10: 00007ffd2b5da750 R11: 0000000000000246 R12: 00007fc6d161142c [ 21.685279][ T546] R13: 00007ffd2b5da750 R14: 00007ffd2b5da770 R15: 0000000000000000 [ 21.693224][ T546] Modules linked in: [ 21.697094][ T546] CR2: 0000000000000010 [ 21.701217][ T546] ---[ end trace fe8044f7dc4d8d65 ]--- [ 21.706667][ T546] RIP: 0010:_raw_spin_lock_irqsave+0x10d/0x210 [ 21.712791][ T546] Code: 00 00 00 e8 d5 29 09 fd 4c 89 e7 be 04 00 00 00 e8 c8 29 09 fd 42 8a 04 3b 84 c0 0f 85 be 00 00 00 8b 44 24 40 b9 01 00 00 00 41 0f b1 4d 00 75 45 48 c7 44 24 20 0e 36 e0 45 4b c7 04 37 00 [ 21.732380][ T546] RSP: 0018:ffffc90000f174e0 EFLAGS: 00010097 [ 21.738439][ T546] RAX: 0000000000000000 RBX: 1ffff920001e2ea4 RCX: 0000000000000001 [ 21.746391][ T546] RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffc90000f17520 [ 21.754399][ T546] RBP: ffffc90000f175b0 R08: dffffc0000000000 R09: 0000000000000003 [ 21.762462][ T546] R10: fffff520001e2ea5 R11: 0000000000000004 R12: ffffc90000f17520 [ 21.770413][ T546] R13: 0000000000000010 R14: 1ffff920001e2ea0 R15: dffffc0000000000 [ 21.778360][ T546] FS: 0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 [ 21.787350][ T546] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 21.793905][ T546] CR2: 0000000000000010 CR3: 000000000640f000 CR4: 00000000003506a0 [ 21.801851][ T546] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 21.809796][ T546] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 21.817740][ T546] Kernel panic - not syncing: Fatal exception [ 21.824046][ T546] Kernel Offset: disabled [ 21.828348][ T546] Rebooting in 86400 seconds..