Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.195' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 38.236632] netlink: 4 bytes leftover after parsing attributes in process `syz-executor624'. executing program executing program executing program [ 38.305048] netlink: 4 bytes leftover after parsing attributes in process `syz-executor624'. [ 38.315333] block nbd0: NBD_DISCONNECT [ 38.321892] kasan: CONFIG_KASAN_INLINE enabled [ 38.321925] nbd: nbd0 already in use [ 38.326486] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 38.326503] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 38.326514] CPU: 0 PID: 8111 Comm: systemd-udevd Not tainted 4.19.211-syzkaller #0 executing program executing program [ 38.326520] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023 [ 38.326556] RIP: 0010:__lock_acquire+0x1eb/0x3ff0 [ 38.326572] 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 [ 38.335135] nbd: nbd0 already in use [ 38.337773] RSP: 0018:ffff888094c07910 EFLAGS: 00010006 [ 38.337793] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 executing program executing program executing program executing program [ 38.337798] RDX: 0000000000000022 RSI: 0000000000000000 RDI: 0000000000000001 [ 38.337811] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001 [ 38.351346] nbd: nbd0 already in use [ 38.352822] R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 [ 38.352828] R13: ffff8880b14960c0 R14: 0000000000000110 R15: 0000000000000001 [ 38.352837] FS: 00007facbfab48c0(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 [ 38.352850] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 executing program executing program [ 38.367270] nbd: nbd0 already in use [ 38.367441] CR2: 00007ffca11659c0 CR3: 00000000ab2a9000 CR4: 00000000003406f0 [ 38.391686] nbd: nbd0 already in use [ 38.396450] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 38.396457] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 38.396462] Call Trace: [ 38.396487] ? __update_load_avg_se+0x5ec/0xa00 [ 38.409087] nbd: nbd0 already in use [ 38.411641] ? check_preemption_disabled+0x41/0x280 [ 38.411654] ? __cpu_to_node+0x7b/0xa0 [ 38.411664] ? account_entity_enqueue+0x2e5/0x440 [ 38.411676] ? mark_held_locks+0xf0/0xf0 [ 38.411686] ? enqueue_entity+0xf86/0x3850 [ 38.411703] ? try_to_wake_up+0x733/0x1050 [ 38.423432] nbd: nbd0 already in use [ 38.423486] lock_acquire+0x170/0x3c0 [ 38.436080] nbd: nbd0 already in use [ 38.439256] ? flush_workqueue+0xe8/0x13e0 [ 38.439269] flush_workqueue+0x117/0x13e0 [ 38.439284] ? flush_workqueue+0xe8/0x13e0 [ 38.453272] nbd: nbd0 already in use [ 38.454444] ? migrate_swap_stop+0x900/0x900 [ 38.454463] ? lock_downgrade+0x720/0x720 [ 38.463588] nbd: nbd0 already in use [ 38.466543] ? lock_acquire+0x170/0x3c0 [ 38.466557] ? __mutex_unlock_slowpath+0x30e/0x610 [ 38.466574] ? check_flush_dependency+0x400/0x400 [ 38.475890] nbd: nbd0 already in use [ 38.478610] ? wake_up_q+0x93/0xe0 [ 38.478630] nbd_disconnect_and_put+0x100/0x190 [ 38.478646] nbd_release+0x144/0x170 [ 38.492356] nbd: nbd0 already in use [ 38.497072] ? nbd_queue_rq+0xe60/0xe60 [ 38.497083] __blkdev_put+0x636/0x870 [ 38.497098] ? fsync_bdev+0xc0/0xc0 [ 38.506659] nbd: nbd0 already in use [ 38.507817] ? locks_remove_file+0x2cd/0x450 [ 38.507829] ? blkdev_put+0x85/0x520 [ 38.507843] ? blkdev_put+0x520/0x520 [ 38.516515] nbd: nbd0 already in use [ 38.517127] blkdev_close+0x86/0xb0 [ 38.517144] __fput+0x2ce/0x890 [ 38.526427] nbd: nbd0 already in use [ 38.526486] task_work_run+0x148/0x1c0 [ 38.536048] nbd: nbd0 already in use [ 38.538978] exit_to_usermode_loop+0x251/0x2a0 [ 38.538992] do_syscall_64+0x538/0x620 [ 38.548043] nbd: nbd0 already in use [ 38.552367] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 38.552379] RIP: 0033:0x7facbebfa270 [ 38.552390] 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 [ 38.552396] RSP: 002b:00007ffca11070f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 [ 38.552406] RAX: 0000000000000000 RBX: 0000000000000007 RCX: 00007facbebfa270 [ 38.552411] RDX: 000000000aba9500 RSI: 0000000000000000 RDI: 0000000000000007 [ 38.552422] RBP: 00007facbfab4710 R08: 0000000000000045 R09: 0000000000000018 [ 38.561559] nbd: nbd0 already in use [ 38.565282] R10: 0000562412f7fc98 R11: 0000000000000246 R12: 0000000000000000 [ 38.565288] R13: 0000562412f7fd20 R14: 0000000000000003 R15: 000000000000000e [ 38.565296] Modules linked in: [ 38.565316] ---[ end trace 27a2411385b359f6 ]--- [ 38.574562] nbd: nbd0 already in use [ 38.577762] RIP: 0010:__lock_acquire+0x1eb/0x3ff0 [ 38.577777] 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 [ 38.588030] nbd: nbd0 already in use [ 38.588281] RSP: 0018:ffff888094c07910 EFLAGS: 00010006 [ 38.588291] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 38.588302] RDX: 0000000000000022 RSI: 0000000000000000 RDI: 0000000000000001 [ 38.597912] nbd: nbd0 already in use [ 38.600843] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001 [ 38.600849] R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 [ 38.600854] R13: ffff8880b14960c0 R14: 0000000000000110 R15: 0000000000000001 [ 38.600862] FS: 00007facbfab48c0(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 [ 38.600869] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 38.600874] CR2: 00007ffca11659c0 CR3: 00000000ab2a9000 CR4: 00000000003406f0 [ 38.600884] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 38.600890] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 38.600899] Kernel panic - not syncing: Fatal exception [ 38.631637] nbd: nbd0 already in use [ 38.633591] Kernel Offset: disabled [ 38.889053] Rebooting in 86400 seconds..