loop0: detected capacity change from 0 to 32768
find_entry called with index = 0
read_mapping_page failed!
ERROR: (device loop0): txCommit: 
loop0: detected capacity change from 32768 to 32767
------------[ cut here ]------------
UBSAN: array-index-out-of-bounds in fs/jfs/jfs_dmap.c:2783:24
index 4294967295 is out of range for type 's8[1365]' (aka 'signed char[1365]')
CPU: 0 UID: 0 PID: 5324 Comm: syz.0.0 Not tainted 6.13.0-syzkaller-07644-gc2da8b3f914f #0
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 lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 ubsan_epilogue lib/ubsan.c:231 [inline]
 __ubsan_handle_out_of_bounds+0x121/0x150 lib/ubsan.c:429
 dbJoin+0x2ed/0x310 fs/jfs/jfs_dmap.c:2783
 dbFreeBits+0x4db/0xd90 fs/jfs/jfs_dmap.c:2343
 dbFreeDmap fs/jfs/jfs_dmap.c:2092 [inline]
 dbFree+0x35b/0x680 fs/jfs/jfs_dmap.c:409
 txFreeMap+0x96a/0xd50 fs/jfs/jfs_txnmgr.c:2515
 xtTruncate+0xe65/0x3270 fs/jfs/jfs_xtree.c:2467
 jfs_truncate_nolock+0x2e4/0x390 fs/jfs/inode.c:373
 jfs_truncate+0xcb/0x140 fs/jfs/inode.c:412
 jfs_setattr+0x526/0x780 fs/jfs/file.c:119
 notify_change+0xbca/0xe90 fs/attr.c:552
 do_truncate+0x220/0x310 fs/open.c:65
 handle_truncate fs/namei.c:3449 [inline]
 do_open fs/namei.c:3832 [inline]
 path_openat+0x2e0e/0x3580 fs/namei.c:3987
 do_filp_open+0x27f/0x4e0 fs/namei.c:4014
 do_sys_openat2+0x13e/0x1d0 fs/open.c:1427
 do_sys_open fs/open.c:1442 [inline]
 __do_sys_creat fs/open.c:1520 [inline]
 __se_sys_creat fs/open.c:1514 [inline]
 __x64_sys_creat+0x123/0x170 fs/open.c:1514
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd13198cd29
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:00007fd1327da038 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 00007fd131ba5fa0 RCX: 00007fd13198cd29
RDX: 0000000000000000 RSI: 000000000000000d RDI: 0000000020000240
RBP: 00007fd131a0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fd131ba5fa0 R15: 00007ffd8e71a978
 </TASK>
---[ end trace ]---