[  OK  ] Reached target Graphical Interface.
         Starting Update UTMP about System Runlevel Changes...
         Starting Load/Save RF Kill Switch Status...
[  OK  ] Started Load/Save RF Kill Switch Status.
[  OK  ] Started Update UTMP about System Runlevel Changes.

Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.1.105' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [  436.213389] BUG at fs/jfs/jfs_dmap.c:3010 assert(n < 4)
[  436.219013] ------------[ cut here ]------------
[  436.223757] kernel BUG at fs/jfs/jfs_dmap.c:3010!
[  436.229939] invalid opcode: 0000 [#1] PREEMPT SMP KASAN
[  436.235306] Modules linked in:
[  436.238621] CPU: 0 PID: 7979 Comm: syz-executor163 Not tainted 4.14.295-syzkaller #0
[  436.246480] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
[  436.255808] task: ffff8880b2d90580 task.stack: ffff8880977d8000
[  436.261841] RIP: 0010:dbFindLeaf+0x110/0x200
[  436.266220] RSP: 0018:ffff8880977df598 EFLAGS: 00010286
[  436.271556] RAX: 000000000000002b RBX: 000000000000001d RCX: 0000000000000000
[  436.278799] RDX: 0000000000000000 RSI: ffffffff878bc9e0 RDI: ffffed1012efbea9
[  436.286044] RBP: ffff8880b610c010 R08: 000000000000002b R09: 0000000000000000
[  436.293373] R10: 0000000000000000 R11: 0000000000000000 R12: 000000000000001d
[  436.300629] R13: 0000000000000000 R14: dffffc0000000000 R15: 00000000001cb702
[  436.307886] FS:  0000555555e2d300(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000
[  436.316084] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  436.321937] CR2: 000055ec3d3e4008 CR3: 00000000ae73a000 CR4: 00000000003406f0
[  436.329188] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  436.336428] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  436.343668] Call Trace:
[  436.346236]  dbAllocDmapLev+0x87/0x280
[  436.350096]  ? lock_acquire+0x170/0x3f0
[  436.354044]  ? dbAllocNext+0x370/0x370
[  436.357903]  dbAlloc+0x6e9/0x980
[  436.361246]  extAlloc+0x478/0xc20
[  436.364673]  ? jfs_ioc_trim+0x3d0/0x3d0
[  436.368621]  jfs_get_block+0x1be/0x950
[  436.372484]  ? rcu_read_lock_sched_held+0x16c/0x1d0
[  436.377531]  ? jfs_open+0x2f0/0x2f0
[  436.381133]  ? alloc_buffer_head+0xe1/0x110
[  436.385429]  nobh_write_begin+0x368/0xc10
[  436.389554]  jfs_write_begin+0x3e/0x190
[  436.393499]  ? jfs_open+0x2f0/0x2f0
[  436.397098]  generic_perform_write+0x1c9/0x420
[  436.401659]  ? __mnt_drop_write_file+0x5f/0x90
[  436.406215]  ? filemap_page_mkwrite+0x2d0/0x2d0
[  436.410858]  ? current_time+0xb0/0xb0
[  436.414632]  ? lock_acquire+0x170/0x3f0
[  436.418582]  __generic_file_write_iter+0x227/0x590
[  436.423485]  generic_file_write_iter+0x36f/0x650
[  436.428217]  do_iter_readv_writev+0x4cf/0x5f0
[  436.432685]  ? clone_verify_area+0x1e0/0x1e0
[  436.437067]  ? rw_verify_area+0xe1/0x2a0
[  436.441099]  do_iter_write+0x152/0x550
[  436.444961]  ? rcu_lockdep_current_cpu_online+0xed/0x140
[  436.450385]  ? rcu_read_lock_sched_held+0x16c/0x1d0
[  436.455374]  vfs_writev+0x125/0x290
[  436.458977]  ? vfs_iter_write+0xa0/0xa0
[  436.462942]  ? debug_check_no_obj_freed+0x2c0/0x680
[  436.467932]  ? __fd_install+0x227/0x5c0
[  436.471887]  ? rcu_lockdep_current_cpu_online+0xed/0x140
[  436.477314]  ? putname+0xcd/0x110
[  436.480741]  ? rcu_read_lock_sched_held+0x16c/0x1d0
[  436.485733]  ? kmem_cache_free+0x23a/0x2b0
[  436.489942]  ? putname+0xcd/0x110
[  436.493369]  do_writev+0xfc/0x2c0
[  436.496793]  ? vfs_writev+0x290/0x290
[  436.500566]  ? __close_fd+0x159/0x230
[  436.504340]  ? do_syscall_64+0x4c/0x640
[  436.508447]  ? SyS_readv+0x30/0x30
[  436.511975]  do_syscall_64+0x1d5/0x640
[  436.515850]  entry_SYSCALL_64_after_hwframe+0x46/0xbb
[  436.521016] RIP: 0033:0x7f847f9d2e59
[  436.524701] RSP: 002b:00007ffe02cce0a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
[  436.532383] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007f847f9d2e59
[  436.539628] RDX: 0000000000000001 RSI: 0000000020000000 RDI: 0000000000000003
[  436.546870] RBP: 00007f847f9926c0 R08: 0000000000000000 R09: 0000000000000000
[  436.554114] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000f8008000
[  436.561355] R13: 0000000000000000 R14: 00080000000000f4 R15: 0000000000000000
[  436.568597] Code: c3 01 44 39 e3 75 be e8 ff 30 1a ff 48 c7 c1 40 a2 b6 87 ba c2 0b 00 00 48 c7 c6 c0 a1 b6 87 48 c7 c7 00 a2 b6 87 e8 65 ba c7 04 <0f> 0b e8 d9 30 1a ff 8d 04 9d 01 00 00 00 41 83 ef 01 75 80 e8 
[  436.587659] RIP: dbFindLeaf+0x110/0x200 RSP: ffff8880977df598
[  436.601804] ---[ end trace d1b3db956d7eb755 ]---
[  436.606554] Kernel panic - not syncing: Fatal exception
[  436.612093] Kernel Offset: disabled
[  436.615698] Rebooting in 86400 seconds..