Kernel panic - not syncing: KASAN: panic_on_warn set ...
CPU: 0 UID: 0 PID: 104 Comm: jfsCommit Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Call Trace:
 <TASK>
 vpanic+0x1e0/0x670 kernel/panic.c:490
 panic+0xc5/0xd0 kernel/panic.c:627
 check_panic_on_warn+0x89/0xb0 kernel/panic.c:377
 end_report+0x6f/0x140 mm/kasan/report.c:227
 kasan_report+0x128/0x150 mm/kasan/report.c:597
 drop_metapage fs/jfs/jfs_metapage.c:311 [inline]
 release_metapage+0x760/0xac0 fs/jfs/jfs_metapage.c:892
 txUnlock+0x524/0xdf0 fs/jfs/jfs_txnmgr.c:948
 txLazyCommit fs/jfs/jfs_txnmgr.c:2683 [inline]
 jfs_lazycommit+0x582/0xaa0 fs/jfs/jfs_txnmgr.c:2734
 kthread+0x726/0x8b0 kernel/kthread.c:463
 ret_from_fork+0x51b/0xa40 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>
Kernel Offset: disabled
Rebooting in 86400 seconds..