------------[ cut here ]------------
WARNING: CPU: 1 PID: 2979 at fs/jfs/jfs_dmap.c:2875 dbAdjTree+0x448/0x4d0 fs/jfs/jfs_dmap.c:2875
Modules linked in:
CPU: 1 PID: 2979 Comm: kworker/u4:9 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: writeback wb_workfn (flush-7:3)
RIP: 0010:dbAdjTree+0x448/0x4d0 fs/jfs/jfs_dmap.c:2875
Code: e8 7d 76 df fe e9 5a ff ff ff e8 e3 08 88 fe eb 05 e8 dc 08 88 fe 48 83 c4 28 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 c8 08 88 fe <0f> 0b eb e8 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c ee fb ff ff 4c
RSP: 0018:ffffc9000c4fe8a0 EFLAGS: 00010293
RAX: ffffffff82fd87f8 RBX: ffff88802cf21010 RCX: ffff88802c173c00
RDX: 0000000000000000 RSI: 0000000000000155 RDI: 0000000000002057
RBP: 0000000000002057 R08: 0000000000000000 R09: 1ffffd4000167908
R10: dffffc0000000000 R11: fffff94000167909 R12: ffff88802cf21018
R13: dffffc0000000000 R14: 0000000000000005 R15: 0000000000000155
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe0ee7dd000 CR3: 000000002e145000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 dbSplit+0x132/0x200 fs/jfs/jfs_dmap.c:2648
 dbAllocBits+0x502/0xa50 fs/jfs/jfs_dmap.c:2193
 dbAllocDmap+0x6b/0x140 fs/jfs/jfs_dmap.c:2034
 dbAlloc+0x468/0xba0 fs/jfs/jfs_dmap.c:805
 extBalloc fs/jfs/jfs_extent.c:326 [inline]
 extAlloc+0x4d6/0xf30 fs/jfs/jfs_extent.c:122
 jfs_get_block+0x347/0xab0 fs/jfs/inode.c:254
 __mpage_writepage+0x7e5/0x1d50 fs/mpage.c:559
 write_cache_pages+0x702/0x11f0 mm/page-writeback.c:2496
 mpage_writepages+0xe8/0x1a0 fs/mpage.c:679
 do_writepages+0x3a2/0x600 mm/page-writeback.c:2575
 __writeback_single_inode+0x153/0xee0 fs/fs-writeback.c:1635
 writeback_sb_inodes+0x77c/0xef0 fs/fs-writeback.c:1926
 wb_writeback+0x450/0xba0 fs/fs-writeback.c:2105
 wb_do_writeback fs/fs-writeback.c:2252 [inline]
 wb_workfn+0x3ff/0xe20 fs/fs-writeback.c:2292
 process_one_work kernel/workqueue.c:2634 [inline]
 process_scheduled_works+0xa45/0x15b0 kernel/workqueue.c:2711
 worker_thread+0xa55/0xfc0 kernel/workqueue.c:2792
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </TASK>