loop0: detected capacity change from 0 to 32768
================================================================================
UBSAN: shift-out-of-bounds in fs/jfs/jfs_dmap.c:201:29
shift exponent -1 is negative
CPU: 1 PID: 5583 Comm: syz-executor.0 Not tainted 6.2.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x12a/0x1c0 lib/dump_stack.c:106
 ubsan_epilogue lib/ubsan.c:151 [inline]
 __ubsan_handle_shift_out_of_bounds+0x222/0x250 lib/ubsan.c:321
 dbMount+0x937/0x940 fs/jfs/jfs_dmap.c:201
 jfs_mount+0x197/0x690 fs/jfs/jfs_mount.c:121
 jfs_fill_super+0x53e/0xad0 fs/jfs/super.c:556
 mount_bdev+0x27a/0x370 fs/super.c:1359
 legacy_get_tree+0xe4/0x170 fs/fs_context.c:610
 vfs_get_tree+0x7b/0x220 fs/super.c:1489
 do_new_mount+0x1df/0x930 fs/namespace.c:3145
 do_mount fs/namespace.c:3488 [inline]
 __do_sys_mount fs/namespace.c:3697 [inline]
 __se_sys_mount+0x20f/0x2a0 fs/namespace.c:3674
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f12d2e8cada
Code: 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f12d3f30f88 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f12d2e8cada
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f12d3f30fe0
RBP: 00007f12d3f31020 R08: 00007f12d3f31020 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020000000
R13: 0000000020000100 R14: 00007f12d3f30fe0 R15: 0000000020005980
 </TASK>
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