loop0: detected capacity change from 0 to 32768
------------[ cut here ]------------
WARNING: CPU: 0 PID: 4498 at fs/jfs/jfs_dmap.c:2943 dbAdjTree+0x448/0x4d0 fs/jfs/jfs_dmap.c:2943
Modules linked in:
CPU: 0 PID: 4498 Comm: syz.0.33 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:dbAdjTree+0x448/0x4d0 fs/jfs/jfs_dmap.c:2943
Code: e8 0d 25 f2 fe e9 5a ff ff ff e8 23 bd ad fe eb 05 e8 1c bd ad fe 48 83 c4 28 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 08 bd ad 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:ffffc9000510f4f8 EFLAGS: 00010283
RAX: ffffffff82ca0d48 RBX: ffff88801f42a010 RCX: 0000000000080000
RDX: ffffc90003d43000 RSI: 0000000000008df1 RDI: 0000000000008df2
RBP: 0000000000002057 R08: 0000000000000000 R09: fffff940000fa151
R10: fffff940000fa151 R11: 1ffffd40000fa150 R12: ffff88801f42a018
R13: dffffc0000000000 R14: 0000000000000005 R15: 0000000000000155
FS:  00007fdd627c06c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdfccefa000 CR3: 000000002584e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 dbSplit+0x132/0x200 fs/jfs/jfs_dmap.c:2716
 dbAllocBits+0x50a/0xa10 fs/jfs/jfs_dmap.c:2261
 dbAllocDmap+0x6b/0x140 fs/jfs/jfs_dmap.c:2102
 dbAlloc+0x464/0xb90 fs/jfs/jfs_dmap.c:805
 extBalloc fs/jfs/jfs_extent.c:523 [inline]
 extAlloc+0x4d2/0xf30 fs/jfs/jfs_extent.c:125
 jfs_get_block+0x343/0xab0 fs/jfs/inode.c:258
 nobh_write_begin+0x3d5/0xe80 fs/buffer.c:2650
 jfs_write_begin+0x3d/0x80 fs/jfs/inode.c:322
 generic_perform_write+0x2aa/0x530 mm/filemap.c:3785
 __generic_file_write_iter+0x25f/0x4e0 mm/filemap.c:3912
 generic_file_write_iter+0xa6/0x1b0 mm/filemap.c:3944
 call_write_iter include/linux/fs.h:2172 [inline]
 new_sync_write fs/read_write.c:507 [inline]
 vfs_write+0x712/0xd00 fs/read_write.c:594
 ksys_pwrite64 fs/read_write.c:701 [inline]
 __do_sys_pwrite64 fs/read_write.c:711 [inline]
 __se_sys_pwrite64 fs/read_write.c:708 [inline]
 __x64_sys_pwrite64+0x194/0x220 fs/read_write.c:708
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fdd64558ec9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fdd627c0038 EFLAGS: 00000246 ORIG_RAX: 0000000000000012
RAX: ffffffffffffffda RBX: 00007fdd647affa0 RCX: 00007fdd64558ec9
RDX: 00000000200000c1 RSI: 00002000000000c0 RDI: 0000000000000006
RBP: 00007fdd645dbf91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000009000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fdd647b0038 R14: 00007fdd647affa0 R15: 00007fff9a2640c8
 </TASK>