loop0: detected capacity change from 0 to 32768
loop0: detected capacity change from 32768 to 32704
------------[ cut here ]------------
UBSAN: array-index-out-of-bounds in fs/jfs/jfs_dmap.c:2344:2
index 134217728 is out of range for type 's64[128]' (aka 'long long[128]')
CPU: 0 UID: 0 PID: 5323 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 ubsan_epilogue+0xa/0x30 lib/ubsan.c:233
 __ubsan_handle_out_of_bounds+0xe8/0xf0 lib/ubsan.c:455
 dbAllocBits+0x9b4/0xa00 fs/jfs/jfs_dmap.c:2344
 dbAllocDmap fs/jfs/jfs_dmap.c:2121 [inline]
 dbAllocDmapLev+0x1b2/0x3b0 fs/jfs/jfs_dmap.c:2075
 dbAllocCtl+0x145/0x990 fs/jfs/jfs_dmap.c:1912
 dbAllocAG+0x1f4/0xf80 fs/jfs/jfs_dmap.c:1440
 dbAlloc+0x5ab/0xba0 fs/jfs/jfs_dmap.c:964
 dtSplitUp fs/jfs/jfs_dtree.c:979 [inline]
 dtInsert+0xb31/0x5cb0 fs/jfs/jfs_dtree.c:868
 jfs_create+0x730/0xae0 fs/jfs/namei.c:138
 vfs_create+0x2c4/0x450 fs/namei.c:4202
 filename_mknodat+0x3e8/0x660 fs/namei.c:5181
 __do_sys_mknod fs/namei.c:5218 [inline]
 __se_sys_mknod+0x3a/0x150 fs/namei.c:5215
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f61cb79ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f61cc5c6fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000085
RAX: ffffffffffffffda RBX: 00007f61cba15fa0 RCX: 00007f61cb79ce59
RDX: 0000000000000701 RSI: 0000000000000000 RDI: 0000200000000000
RBP: 00007f61cb832e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f61cba16038 R14: 00007f61cba15fa0 R15: 00007ffde5c4dd28
 </TASK>
---[ end trace ]---