[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.250' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 309.531575] DEBUG_LOCKS_WARN_ON(__owner_task(owner) != current) [ 309.531622] ------------[ cut here ]------------ [ 309.542459] WARNING: CPU: 1 PID: 7988 at kernel/locking/mutex.c:1032 __mutex_unlock_slowpath+0x75c/0x770 [ 309.552065] Kernel panic - not syncing: panic_on_warn set ... [ 309.552065] [ 309.559630] CPU: 1 PID: 7988 Comm: syz-executor230 Not tainted 4.14.295-syzkaller #0 [ 309.567489] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 [ 309.576819] Call Trace: [ 309.579388] dump_stack+0x1b2/0x281 [ 309.582993] panic+0x1f9/0x42d [ 309.586155] ? add_taint.cold+0x16/0x16 [ 309.590105] ? __mutex_unlock_slowpath+0x75c/0x770 [ 309.595009] ? __mutex_unlock_slowpath+0x75c/0x770 [ 309.599910] __warn.cold+0x20/0x44 [ 309.603426] ? ist_end_non_atomic+0x10/0x10 [ 309.607722] ? __mutex_unlock_slowpath+0x75c/0x770 [ 309.612626] report_bug+0x208/0x250 [ 309.616230] do_error_trap+0x195/0x2d0 [ 309.620091] ? math_error+0x2d0/0x2d0 [ 309.623993] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 309.628820] invalid_op+0x1b/0x40 [ 309.632255] RIP: 0010:__mutex_unlock_slowpath+0x75c/0x770 [ 309.637764] RSP: 0018:ffff8880b34d7540 EFLAGS: 00010282 [ 309.643247] RAX: 0000000000000033 RBX: ffff8880a8f1827f RCX: 0000000000000000 [ 309.650615] RDX: 0000000000000000 RSI: 0000000000000002 RDI: ffffed101669ae9e [ 309.657860] RBP: ffff88809dbc4490 R08: 0000000000000033 R09: 0000000000000000 [ 309.665118] R10: 0000000000000000 R11: ffff8880a8f18280 R12: ffffffff8becddc0 [ 309.672363] R13: 1ffff1101669aeac R14: ffff8880b34d7580 R15: 0000000000000003 [ 309.679618] ? dbAllocBits+0x3cd/0x4a0 [ 309.683479] ? wait_for_completion_io+0x10/0x10 [ 309.688123] dbAllocDmap+0x5f/0x100 [ 309.691725] dbAllocNext+0x2ad/0x370 [ 309.695414] dbAlloc+0x31d/0x980 [ 309.698752] extAlloc+0x478/0xc20 [ 309.702184] ? jfs_ioc_trim+0x3d0/0x3d0 [ 309.706134] jfs_get_block+0x1be/0x950 [ 309.710002] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 309.714989] ? jfs_open+0x2f0/0x2f0 [ 309.718587] ? alloc_buffer_head+0xe1/0x110 [ 309.722882] nobh_write_begin+0x368/0xc10 [ 309.727002] jfs_write_begin+0x3e/0x190 [ 309.730950] ? jfs_open+0x2f0/0x2f0 [ 309.734550] generic_perform_write+0x1c9/0x420 [ 309.739108] ? __mnt_drop_write_file+0x5f/0x90 [ 309.743663] ? filemap_page_mkwrite+0x2d0/0x2d0 [ 309.748303] ? current_time+0xb0/0xb0 [ 309.752075] ? lock_acquire+0x170/0x3f0 [ 309.756024] __generic_file_write_iter+0x227/0x590 [ 309.760929] generic_file_write_iter+0x36f/0x650 [ 309.765663] do_iter_readv_writev+0x4cf/0x5f0 [ 309.770132] ? clone_verify_area+0x1e0/0x1e0 [ 309.774513] ? rw_verify_area+0xe1/0x2a0 [ 309.778544] do_iter_write+0x152/0x550 [ 309.782415] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 309.787847] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 309.792850] vfs_writev+0x125/0x290 [ 309.796448] ? vfs_iter_write+0xa0/0xa0 [ 309.800396] ? putname+0xcd/0x110 [ 309.803820] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 309.809243] ? putname+0xcd/0x110 [ 309.812670] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 309.817661] ? kmem_cache_free+0x23a/0x2b0 [ 309.821869] ? putname+0xcd/0x110 [ 309.825294] SyS_pwritev+0x15a/0x200 [ 309.828981] ? SyS_preadv2+0x230/0x230 [ 309.832838] ? __close_fd+0x159/0x230 [ 309.836696] ? do_syscall_64+0x4c/0x640 [ 309.840642] ? SyS_preadv2+0x230/0x230 [ 309.844500] do_syscall_64+0x1d5/0x640 [ 309.848360] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 309.853522] RIP: 0033:0x7f5ce7023e59 [ 309.857204] RSP: 002b:00007ffe577c4be8 EFLAGS: 00000246 ORIG_RAX: 0000000000000128 [ 309.864884] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5ce7023e59 [ 309.872126] RDX: 0000000000000001 RSI: 0000000020002200 RDI: 0000000000000003 [ 309.879369] RBP: 00007f5ce6fe36c0 R08: 0000000000000000 R09: 00007f5ce6fe36c0 [ 309.886614] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000f8008000 [ 309.893920] R13: 0000000000000000 R14: 00080000000000f8 R15: 0000000000000000 [ 309.901355] Kernel Offset: disabled [ 309.904961] Rebooting in 86400 seconds..