Kernel panic - not syncing: KASAN: panic_on_warn set ...
CPU: 0 UID: 0 PID: 103 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~bpo12+1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x99/0x250 lib/dump_stack.c:120
 vpanic+0x281/0x750 kernel/panic.c:430
 panic+0xb9/0xc0 kernel/panic.c:566
 check_panic_on_warn+0x89/0xb0 kernel/panic.c:323
 end_report+0x78/0x160 mm/kasan/report.c:227
 kasan_report+0x129/0x150 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:947
 txLazyCommit fs/jfs/jfs_txnmgr.c:2682 [inline]
 jfs_lazycommit+0x584/0xa90 fs/jfs/jfs_txnmgr.c:2733
 kthread+0x70e/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x436/0x7d0 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Kernel Offset: disabled
Rebooting in 86400 seconds..