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

Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.1.46' (ECDSA) to the list of known hosts.
syzkaller login: [  871.256476] IPVS: ftp: loaded support on port[0] = 21
executing program
[  871.367603] ==================================================================
[  871.375073] BUG: KASAN: use-after-free in dbJoin+0x21b/0x220
[  871.380881] Read of size 1 at addr ffff88819c47fa4c by task jfsCommit/1986
[  871.387884] 
[  871.389571] CPU: 0 PID: 1986 Comm: jfsCommit Not tainted 4.19.211-syzkaller #0
[  871.396932] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
[  871.406297] Call Trace:
[  871.408883]  dump_stack+0x1fc/0x2ef
[  871.412497]  print_address_description.cold+0x54/0x219
[  871.417763]  kasan_report_error.cold+0x8a/0x1b9
[  871.422418]  ? dbJoin+0x21b/0x220
[  871.425939]  __asan_report_load1_noabort+0x88/0x90
[  871.430848]  ? dbJoin+0x21b/0x220
[  871.434718]  dbJoin+0x21b/0x220
[  871.437998]  dbFreeBits+0xf0/0x710
[  871.441538]  dbFreeDmap+0x61/0x1a0
[  871.445068]  dbFree+0x252/0x500
[  871.448334]  txFreeMap+0x7a4/0xb20
[  871.451860]  txUpdateMap+0x369/0x1000
[  871.455659]  ? lock_downgrade+0x5b0/0x720
[  871.459792]  jfs_lazycommit+0x525/0x9d0
[  871.463755]  ? txCommit+0x39e0/0x39e0
[  871.467535]  ? lock_acquire+0x170/0x3c0
[  871.471507]  ? __kthread_parkme+0x5d/0x1e0
[  871.475723]  ? wake_up_q+0xe0/0xe0
[  871.479242]  ? lockdep_hardirqs_on+0x3a8/0x5c0
[  871.483804]  ? _raw_spin_unlock_irqrestore+0x66/0xe0
[  871.488891]  ? __kthread_parkme+0x133/0x1e0
[  871.493193]  ? txCommit+0x39e0/0x39e0
[  871.496975]  kthread+0x33f/0x460
[  871.500332]  ? kthread_park+0x180/0x180
[  871.504297]  ret_from_fork+0x24/0x30
[  871.508137] 
[  871.509746] The buggy address belongs to the page:
[  871.514674] page:ffffea0006711fc0 count:0 mapcount:0 mapping:0000000000000000 index:0x0
[  871.522800] flags: 0x57ff00000000000()
[  871.526674] raw: 057ff00000000000 ffffea0006711fc8 ffffea0006711fc8 0000000000000000
[  871.534709] raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[  871.542562] page dumped because: kasan: bad access detected
[  871.548260] 
[  871.549878] Memory state around the buggy address:
[  871.554805]  ffff88819c47f900: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[  871.562238]  ffff88819c47f980: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[  871.569748] >ffff88819c47fa00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[  871.577080]                                               ^
[  871.582768]  ffff88819c47fa80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[  871.591446]  ffff88819c47fb00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[  871.598778] ==================================================================
[  871.606458] Disabling lock debugging due to kernel taint
[  871.612420] Kernel panic - not syncing: panic_on_warn set ...
[  871.612420] 
[  871.619977] CPU: 1 PID: 1986 Comm: jfsCommit Tainted: G    B             4.19.211-syzkaller #0
[  871.628721] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
[  871.638065] Call Trace:
[  871.640646]  dump_stack+0x1fc/0x2ef
[  871.644262]  panic+0x26a/0x50e
[  871.647439]  ? __warn_printk+0xf3/0xf3
[  871.651310]  ? preempt_schedule_common+0x45/0xc0
[  871.656049]  ? ___preempt_schedule+0x16/0x18
[  871.660443]  ? trace_hardirqs_on+0x55/0x210
[  871.664751]  kasan_end_report+0x43/0x49
[  871.668708]  kasan_report_error.cold+0xa7/0x1b9
[  871.673361]  ? dbJoin+0x21b/0x220
[  871.676803]  __asan_report_load1_noabort+0x88/0x90
[  871.681810]  ? dbJoin+0x21b/0x220
[  871.685253]  dbJoin+0x21b/0x220
[  871.688531]  dbFreeBits+0xf0/0x710
[  871.692066]  dbFreeDmap+0x61/0x1a0
[  871.695588]  dbFree+0x252/0x500
[  871.698852]  txFreeMap+0x7a4/0xb20
[  871.702379]  txUpdateMap+0x369/0x1000
[  871.706165]  ? lock_downgrade+0x5b0/0x720
[  871.710298]  jfs_lazycommit+0x525/0x9d0
[  871.714257]  ? txCommit+0x39e0/0x39e0
[  871.718042]  ? lock_acquire+0x170/0x3c0
[  871.723908]  ? __kthread_parkme+0x5d/0x1e0
[  871.728127]  ? wake_up_q+0xe0/0xe0
[  871.731654]  ? lockdep_hardirqs_on+0x3a8/0x5c0
[  871.736219]  ? _raw_spin_unlock_irqrestore+0x66/0xe0
[  871.741323]  ? __kthread_parkme+0x133/0x1e0
[  871.745639]  ? txCommit+0x39e0/0x39e0
[  871.749430]  kthread+0x33f/0x460
[  871.752782]  ? kthread_park+0x180/0x180
[  871.756739]  ret_from_fork+0x24/0x30
[  871.760586] Kernel Offset: disabled
[  871.764200] Rebooting in 86400 seconds..