------------[ cut here ]------------
WARNING: CPU: 0 PID: 4591 at fs/jfs/jfs_dmap.c:2875 dbAdjTree+0x448/0x4d0 fs/jfs/jfs_dmap.c:2875
Modules linked in:
CPU: 0 PID: 4591 Comm: syz.0.47 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:2875
Code: e8 5d 61 e6 fe e9 5a ff ff ff e8 43 40 96 fe eb 05 e8 3c 40 96 fe 48 83 c4 28 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 28 40 96 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:ffffc90004c7ee18 EFLAGS: 00010283
RAX: ffffffff82ea9068 RBX: ffff88807c0bc010 RCX: 0000000000080000
RDX: ffffc90005741000 RSI: 000000000001c915 RDI: 000000000001c916
RBP: 0000000000002057 R08: 0000000000000000 R09: fffff940003e05e1
R10: fffff940003e05e1 R11: 1ffffd40003e05e0 R12: ffff88807c0bc018
R13: dffffc0000000000 R14: 0000000000000005 R15: 0000000000000155
FS:  00007f972b5c46c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8d2757a000 CR3: 000000002e7f2000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 dbSplit+0x132/0x200 fs/jfs/jfs_dmap.c:2648
 dbAllocBits+0x50c/0xa40 fs/jfs/jfs_dmap.c:2193
 dbAllocDmap+0x6b/0x140 fs/jfs/jfs_dmap.c:2034
 dbAlloc+0x464/0xb90 fs/jfs/jfs_dmap.c:805
 extBalloc fs/jfs/jfs_extent.c:326 [inline]
 extAlloc+0x4d2/0xf30 fs/jfs/jfs_extent.c:122
 jfs_get_block+0x343/0xab0 fs/jfs/inode.c:248
 __block_write_begin_int+0x54b/0x1a70 fs/buffer.c:1991
 __block_write_begin fs/buffer.c:2041 [inline]
 block_write_begin+0x96/0x1e0 fs/buffer.c:2102
 jfs_write_begin+0x31/0x70 fs/jfs/inode.c:304
 generic_perform_write+0x2db/0x560 mm/filemap.c:3846
 __generic_file_write_iter+0x2b4/0x430 mm/filemap.c:3942
 generic_file_write_iter+0xab/0x2e0 mm/filemap.c:4006
 do_iter_readv_writev fs/read_write.c:-1 [inline]
 do_iter_write+0x62d/0xaf0 fs/read_write.c:861
 iter_file_splice_write+0x665/0xc50 fs/splice.c:685
 do_splice_from fs/splice.c:763 [inline]
 direct_splice_actor+0xe1/0x130 fs/splice.c:950
 splice_direct_to_actor+0x480/0xb60 fs/splice.c:896
 do_splice_direct+0x1b0/0x2b0 fs/splice.c:1002
 do_sendfile+0x5cc/0xeb0 fs/read_write.c:1255
 __do_sys_sendfile64 fs/read_write.c:1323 [inline]
 __se_sys_sendfile64+0x13b/0x190 fs/read_write.c:1309
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f972a78eba9
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:00007f972b5c4038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f972a9d5fa0 RCX: 00007f972a78eba9
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000004
RBP: 00007f972a811e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000800000009 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f972a9d6038 R14: 00007f972a9d5fa0 R15: 00007fff982891a8
 </TASK>