loop0: detected capacity change from 0 to 32768
loop0: detected capacity change from 32768 to 32736
ERROR: (device loop0): dbAllocBits: leaf page corrupt
------------[ cut here ]------------
UBSAN: shift-out-of-bounds in fs/jfs/jfs_dmap.c:3034:55
shift exponent 32 is too large for 32-bit type 'u32' (aka 'unsigned int')
CPU: 0 UID: 0 PID: 5314 Comm: syz.0.0 Not tainted 6.14.0-syzkaller-03565-gf6e0150b2003 #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 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_shift_out_of_bounds+0x3c8/0x420 lib/ubsan.c:492
 dbFindBits+0x11a/0x1d0 fs/jfs/jfs_dmap.c:3034
 dbAllocDmapLev+0x22c/0x4b0 fs/jfs/jfs_dmap.c:1988
 dbAllocCtl+0x149/0x9b0 fs/jfs/jfs_dmap.c:1828
 dbAllocAG+0x2a1/0x1130 fs/jfs/jfs_dmap.c:1364
 dbDiscardAG+0x369/0xa40 fs/jfs/jfs_dmap.c:1613
 jfs_ioc_trim+0x45c/0x6b0 fs/jfs/jfs_discard.c:105
 jfs_ioctl+0x2e5/0x400 fs/jfs/ioctl.c:131
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:906 [inline]
 __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:892
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb355f8d169
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:00007fb356dd6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fb3561a5fa0 RCX: 00007fb355f8d169
RDX: 00002000000000c0 RSI: 00000000c0185879 RDI: 0000000000000004
RBP: 00007fb35600e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fb3561a5fa0 R15: 00007fff81ab8098
 </TASK>
---[ end trace ]---