Warning: Permanently added '10.128.0.162' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 34.553991] netlink: 4 bytes leftover after parsing attributes in process `syz-executor158'. [ 34.562657] netlink: 4 bytes leftover after parsing attributes in process `syz-executor158'. executing program executing program executing program [ 34.637652] netlink: 4 bytes leftover after parsing attributes in process `syz-executor158'. [ 34.646455] netlink: 4 bytes leftover after parsing attributes in process `syz-executor158'. [ 34.656943] block nbd0: NBD_DISCONNECT [ 34.661487] kasan: CONFIG_KASAN_INLINE enabled [ 34.661530] nbd: nbd0 already in use [ 34.666102] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 34.666115] general protection fault: 0000 [#1] PREEMPT SMP KASAN executing program executing program executing program [ 34.666126] CPU: 0 PID: 8110 Comm: systemd-udevd Not tainted 4.19.211-syzkaller #0 [ 34.666132] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 34.666150] RIP: 0010:__lock_acquire+0x1eb/0x3ff0 [ 34.666159] Code: 2b 29 00 00 48 81 c4 98 01 00 00 44 89 f8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 <80> 3c 02 00 0f 85 b3 2a 00 00 49 81 3e 20 f2 66 8c 0f 84 65 ff ff [ 34.666165] RSP: 0018:ffff88809de8f910 EFLAGS: 00010006 [ 34.666173] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 executing program executing program executing program [ 34.666183] RDX: 0000000000000022 RSI: 0000000000000000 RDI: 0000000000000001 [ 34.679548] nbd: nbd0 already in use [ 34.683595] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001 [ 34.683601] R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 [ 34.683607] R13: ffff8880b0348140 R14: 0000000000000110 R15: 0000000000000001 [ 34.683615] FS: 00007f7804cae8c0(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 [ 34.683621] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 executing program executing program executing program [ 34.683627] CR2: 00007ffd6d0ac9c0 CR3: 00000000a2c7f000 CR4: 00000000003406f0 [ 34.683637] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 34.683642] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 34.683646] Call Trace: [ 34.683666] ? __lock_acquire+0x6de/0x3ff0 [ 34.683682] ? mark_held_locks+0xf0/0xf0 [ 34.698492] nbd: nbd0 already in use [ 34.700874] ? __lock_acquire+0x6de/0x3ff0 [ 34.700890] ? mark_held_locks+0xf0/0xf0 [ 34.710191] nbd: nbd0 already in use [ 34.724618] ? __free_object+0xdd/0x1e0 [ 34.724632] ? mark_held_locks+0xf0/0xf0 [ 34.724642] ? mark_held_locks+0xa6/0xf0 [ 34.724654] lock_acquire+0x170/0x3c0 [ 34.724666] ? flush_workqueue+0xe8/0x13e0 [ 34.724677] flush_workqueue+0x117/0x13e0 [ 34.724687] ? flush_workqueue+0xe8/0x13e0 [ 34.724699] ? lock_downgrade+0x720/0x720 [ 34.724715] ? hctx_unlock+0x83/0x140 [ 34.737127] nbd: nbd0 already in use [ 34.737336] ? check_flush_dependency+0x400/0x400 [ 34.749081] nbd: nbd0 already in use [ 34.755714] nbd_disconnect_and_put+0x100/0x190 [ 34.755728] nbd_release+0x144/0x170 [ 34.755739] ? nbd_queue_rq+0xe60/0xe60 [ 34.755748] __blkdev_put+0x636/0x870 [ 34.755761] ? fsync_bdev+0xc0/0xc0 [ 34.768598] nbd: nbd0 already in use [ 34.770525] ? locks_remove_file+0x2cd/0x450 [ 34.770540] ? blkdev_put+0x85/0x520 [ 34.783287] nbd: nbd0 already in use [ 34.784636] ? blkdev_put+0x520/0x520 [ 34.784649] blkdev_close+0x86/0xb0 [ 34.796143] nbd: nbd0 already in use [ 34.799178] __fput+0x2ce/0x890 [ 34.799197] task_work_run+0x148/0x1c0 [ 34.809621] nbd: nbd0 already in use [ 34.813274] exit_to_usermode_loop+0x251/0x2a0 [ 34.813285] do_syscall_64+0x538/0x620 [ 34.813300] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 34.813313] RIP: 0033:0x7f7803df4270 [ 34.823138] nbd: nbd0 already in use [ 34.825281] 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 [ 34.825292] RSP: 002b:00007ffd6d0200a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 [ 34.832312] nbd: nbd0 already in use [ 34.833077] RAX: 0000000000000000 RBX: 0000000000000007 RCX: 00007f7803df4270 [ 34.833083] RDX: 000000000aba9500 RSI: 0000000000000000 RDI: 0000000000000007 [ 34.833089] RBP: 00007f7804cae710 R08: 0000000000000045 R09: 0000000000000018 [ 34.833095] R10: 000055836c2ffc48 R11: 0000000000000246 R12: 0000000000000000 [ 34.833100] R13: 000055836c2ffcd0 R14: 0000000000000003 R15: 000000000000000e [ 34.833108] Modules linked in: [ 34.833128] ---[ end trace af49bd32dad7c3e0 ]--- [ 34.845009] nbd: nbd0 already in use [ 34.845177] RIP: 0010:__lock_acquire+0x1eb/0x3ff0 [ 34.851853] nbd: nbd0 already in use [ 34.853163] Code: 2b 29 00 00 48 81 c4 98 01 00 00 44 89 f8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 <80> 3c 02 00 0f 85 b3 2a 00 00 49 81 3e 20 f2 66 8c 0f 84 65 ff ff [ 34.853169] RSP: 0018:ffff88809de8f910 EFLAGS: 00010006 [ 34.853178] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 34.853183] RDX: 0000000000000022 RSI: 0000000000000000 RDI: 0000000000000001 [ 34.853189] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001 [ 34.853194] R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 [ 34.853199] R13: ffff8880b0348140 R14: 0000000000000110 R15: 0000000000000001 [ 34.853213] FS: 00007f7804cae8c0(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 [ 34.853219] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 34.853224] CR2: 00007ffd6d0ac9c0 CR3: 00000000a2c7f000 CR4: 00000000003406f0 [ 34.853233] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 34.853239] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 34.853244] Kernel panic - not syncing: Fatal exception [ 34.853405] Kernel Offset: disabled [ 35.151919] Rebooting in 86400 seconds..