Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.210' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 53.271820][ T8384] netlink: 4 bytes leftover after parsing attributes in process `syz-executor810'. [ 53.295212][ T8389] netlink: 4 bytes leftover after parsing attributes in process `syz-executor810'. [ 53.310476][ T8391] netlink: 4 bytes leftover after parsing attributes in process `syz-executor810'. executing program executing program executing program [ 53.312022][ T8395] block nbd0: NBD_DISCONNECT [ 53.337381][ T8390] netlink: 4 bytes leftover after parsing attributes in process `syz-executor810'. [ 53.345915][ T8395] general protection fault, probably for non-canonical address 0xdffffc0000000027: 0000 [#1] PREEMPT SMP KASAN [ 53.355906][ T8392] netlink: 4 bytes leftover after parsing attributes in process `syz-executor810'. [ 53.358404][ T8395] KASAN: null-ptr-deref in range [0x0000000000000138-0x000000000000013f] [ 53.358419][ T8395] CPU: 0 PID: 8395 Comm: systemd-udevd Not tainted 5.11.0-syzkaller #0 [ 53.378896][ T8398] block nbd1: NBD_DISCONNECT [ 53.384316][ T8395] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 53.384328][ T8395] RIP: 0010:__lock_acquire+0x8a/0x5e90 [ 53.404424][ T8395] Code: ff df 8a 04 30 84 c0 0f 85 3b 26 00 00 83 3d c0 40 58 0c 00 0f 84 b1 41 00 00 83 3d cf 7b 02 0b 00 74 2b 4c 89 f8 48 c1 e8 03 <80> 3c 30 00 74 12 4c 89 ff e8 78 ce 5f 00 48 be 00 00 00 00 00 fc [ 53.414870][ T8398] ================================================================== [ 53.424052][ T8395] RSP: 0018:ffffc90001a2f8f0 EFLAGS: 00010006 [ 53.432117][ T8398] BUG: KASAN: null-ptr-deref in __mutex_lock_common+0x18d/0x2f00 [ 53.438176][ T8395] RAX: 0000000000000027 RBX: 0000000000000000 RCX: 0000000000000000 [ 53.445862][ T8398] Read of size 8 at addr 0000000000000020 by task systemd-udevd/8398 [ 53.453808][ T8395] RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 0000000000000138 [ 53.461841][ T8398] [ 53.461848][ T8398] CPU: 1 PID: 8398 Comm: systemd-udevd Not tainted 5.11.0-syzkaller #0 [ 53.469789][ T8395] RBP: ffffc90001a2faa0 R08: 0000000000000001 R09: 0000000000000000 [ 53.472093][ T8398] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 53.480311][ T8395] R10: fffffbfff1b6727e R11: 0000000000000000 R12: ffff888022c3d340 [ 53.488276][ T8398] Call Trace: [ 53.488288][ T8398] dump_stack+0x137/0x1be [ 53.498305][ T8395] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000138 [ 53.506261][ T8398] ? wake_up_klogd+0xb2/0xf0 [ 53.509519][ T8395] FS: 00007fce26a608c0(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 53.513822][ T8398] kasan_report+0x154/0x200 [ 53.521766][ T8395] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 53.526329][ T8398] ? __mutex_lock_common+0x18d/0x2f00 [ 53.535229][ T8395] CR2: 00007ffd2589efe8 CR3: 0000000013a4a000 CR4: 00000000001506f0 [ 53.539710][ T8398] ? flush_workqueue+0x144/0x1620 [ 53.546271][ T8395] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 53.551613][ T8398] check_memory_region+0x2b5/0x2f0 [ 53.559558][ T8395] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 53.564555][ T8398] __mutex_lock_common+0x18d/0x2f00 [ 53.572502][ T8395] Call Trace: [ 53.572514][ T8395] ? __lock_acquire+0x1281/0x5e90 [ 53.577590][ T8398] ? trace_lock_acquire+0x59/0x180 [ 53.585542][ T8395] lock_acquire+0x114/0x5e0 [ 53.590719][ T8398] ? trace_lock_release+0x4f/0x140 [ 53.593988][ T8395] ? flush_workqueue+0x104/0x1620 [ 53.598981][ T8398] ? flush_workqueue+0x144/0x1620 [ 53.604068][ T8395] flush_workqueue+0x120/0x1620 [ 53.608542][ T8398] mutex_lock_nested+0x1a/0x20 [ 53.613621][ T8395] ? flush_workqueue+0x104/0x1620 [ 53.618619][ T8398] flush_workqueue+0x144/0x1620 [ 53.623618][ T8395] ? nbd_disconnect_and_put+0xfc/0x1f0 [ 53.628439][ T8398] ? nbd_disconnect_and_put+0xfc/0x1f0 [ 53.633193][ T8395] nbd_disconnect_and_put+0x124/0x1f0 [ 53.638212][ T8398] ? lock_release+0x27/0x6b0 [ 53.643059][ T8395] nbd_release+0xeb/0x120 [ 53.648513][ T8398] ? hctx_unlock+0xa1/0x110 [ 53.653950][ T8395] ? nbd_open+0x9a0/0x9a0 [ 53.659296][ T8398] nbd_disconnect_and_put+0x124/0x1f0 [ 53.663899][ T8395] __blkdev_put+0x516/0x670 [ 53.668330][ T8398] nbd_release+0xeb/0x120 [ 53.672834][ T8395] ? __mutex_unlock_slowpath+0x12d/0x520 [ 53.677140][ T8398] ? nbd_open+0x9a0/0x9a0 [ 53.682497][ T8395] blkdev_put+0x2cd/0x440 [ 53.686990][ T8398] __blkdev_put+0x516/0x670 [ 53.691307][ T8395] blkdev_close+0x7a/0xa0 [ 53.696926][ T8398] ? __mutex_unlock_slowpath+0x12d/0x520 [ 53.701233][ T8395] ? blkdev_open+0x2c0/0x2c0 [ 53.705537][ T8398] blkdev_put+0x2cd/0x440 [ 53.710009][ T8395] __fput+0x34d/0x7a0 [ 53.714313][ T8398] blkdev_close+0x7a/0xa0 [ 53.719919][ T8395] task_work_run+0x137/0x1c0 [ 53.724475][ T8398] ? blkdev_open+0x2c0/0x2c0 [ 53.728778][ T8395] exit_to_user_mode_prepare+0x10b/0x1e0 [ 53.732729][ T8398] __fput+0x34d/0x7a0 [ 53.737029][ T8395] ? trace_irq_disable_rcuidle+0x11/0x170 [ 53.741594][ T8398] task_work_run+0x137/0x1c0 [ 53.746167][ T8395] syscall_exit_to_user_mode+0x48/0x180 [ 53.751857][ T8398] exit_to_user_mode_prepare+0x10b/0x1e0 [ 53.755812][ T8395] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 53.761502][ T8398] ? trace_irq_disable_rcuidle+0x11/0x170 [ 53.766080][ T8395] RIP: 0033:0x7fce25ba6270 [ 53.771606][ T8398] syscall_exit_to_user_mode+0x48/0x180 [ 53.777211][ T8395] Code: 73 01 c3 48 8b 0d 38 7d 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 59 c1 20 00 00 75 10 b8 03 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 ee fb ff ff 48 89 04 24 [ 53.783086][ T8398] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 53.788775][ T8395] RSP: 002b:00007ffddcf33578 EFLAGS: 00000246 [ 53.793179][ T8398] RIP: 0033:0x7fce25ba6270 [ 53.798695][ T8395] ORIG_RAX: 0000000000000003 [ 53.818554][ T8398] Code: 73 01 c3 48 8b 0d 38 7d 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 59 c1 20 00 00 75 10 b8 03 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 ee fb ff ff 48 89 04 24 [ 53.824414][ T8395] RAX: 0000000000000000 RBX: 0000000000000007 RCX: 00007fce25ba6270 [ 53.830452][ T8398] RSP: 002b:00007ffddcf33578 EFLAGS: 00000246 [ 53.834839][ T8395] RDX: 000000000aba9500 RSI: 0000000000000000 RDI: 0000000000000007 [ 53.839485][ T8398] ORIG_RAX: 0000000000000003 [ 53.859091][ T8395] RBP: 00007fce26a60710 R08: 000000000000004a R09: 0000000000000008 [ 53.867055][ T8398] RAX: 0000000000000000 RBX: 0000000000000007 RCX: 00007fce25ba6270 [ 53.873090][ T8395] R10: 000055ed6e37e9a8 R11: 0000000000000246 R12: 0000000000000000 [ 53.881060][ T8398] RDX: 000000000aba9500 RSI: 0000000000000000 RDI: 0000000000000007 [ 53.885708][ T8395] R13: 000055ed6e390fd0 R14: 0000000000000003 R15: 000000000000000e [ 53.893654][ T8398] RBP: 00007fce26a60710 R08: 000000000000004a R09: 0000000000000008 [ 53.901612][ T8395] Modules linked in: [ 53.909547][ T8398] R10: 000055ed6e3912a8 R11: 0000000000000246 R12: 0000000000000000 [ 53.917496][ T8395] [ 53.917576][ T8395] ---[ end trace aae642bbdfc14982 ]--- [ 53.925546][ T8398] R13: 000055ed6e38ff10 R14: 0000000000000003 R15: 000000000000000e [ 53.933515][ T8395] RIP: 0010:__lock_acquire+0x8a/0x5e90 [ 53.937391][ T8398] ================================================================== [ 53.945337][ T8395] Code: ff df 8a 04 30 84 c0 0f 85 3b 26 00 00 83 3d c0 40 58 0c 00 0f 84 b1 41 00 00 83 3d cf 7b 02 0b 00 74 2b 4c 89 f8 48 c1 e8 03 <80> 3c 30 00 74 12 4c 89 ff e8 78 ce 5f 00 48 be 00 00 00 00 00 fc [ 53.948151][ T8398] Kernel panic - not syncing: panic_on_warn set ... [ 53.953071][ T8395] RSP: 0018:ffffc90001a2f8f0 EFLAGS: 00010006 [ 54.007387][ T8395] RAX: 0000000000000027 RBX: 0000000000000000 RCX: 0000000000000000 [ 54.015352][ T8395] RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 0000000000000138 [ 54.023302][ T8395] RBP: ffffc90001a2faa0 R08: 0000000000000001 R09: 0000000000000000 [ 54.031253][ T8395] R10: fffffbfff1b6727e R11: 0000000000000000 R12: ffff888022c3d340 [ 54.039221][ T8395] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000138 [ 54.047191][ T8395] FS: 00007fce26a608c0(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 54.056103][ T8395] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 54.062669][ T8395] CR2: 00007ffd2589efe8 CR3: 0000000013a4a000 CR4: 00000000001506f0 [ 54.070625][ T8395] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 54.078589][ T8395] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 55.080584][ T8398] Shutting down cpus with NMI [ 55.085938][ T8398] Kernel Offset: disabled [ 55.090256][ T8398] Rebooting in 86400 seconds..