loop4: detected capacity change from 0 to 32768
------------[ cut here ]------------
UBSAN: array-index-out-of-bounds in fs/jfs/jfs_dmap.c:2257:2
index 536870912 is out of range for type 's64[128]' (aka 'long long[128]')
CPU: 1 UID: 0 PID: 7501 Comm: syz.4.148 Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 ubsan_epilogue+0x14/0x48 lib/ubsan.c:233
 __ubsan_handle_out_of_bounds+0xd0/0xfc lib/ubsan.c:455
 dbAllocBits+0x87c/0x8c4 fs/jfs/jfs_dmap.c:2257
 dbAllocDmap fs/jfs/jfs_dmap.c:2034 [inline]
 dbAllocNear+0x25c/0x350 fs/jfs/jfs_dmap.c:1247
 dbAlloc+0x72c/0x9dc fs/jfs/jfs_dmap.c:832
 diNewExt+0x768/0x253c fs/jfs/jfs_imap.c:2261
 diAllocExt fs/jfs/jfs_imap.c:1952 [inline]
 diAllocAG+0x9bc/0x1a84 fs/jfs/jfs_imap.c:1669
 diAlloc+0x17c/0x1630 fs/jfs/jfs_imap.c:1590
 ialloc+0x80/0x78c fs/jfs/jfs_inode.c:56
 jfs_mkdir+0x170/0x8b4 fs/jfs/namei.c:225
 vfs_mkdir+0x284/0x424 fs/namei.c:4366
 do_mkdirat+0x1f8/0x4c8 fs/namei.c:4399
 __do_sys_mkdirat fs/namei.c:4416 [inline]
 __se_sys_mkdirat fs/namei.c:4414 [inline]
 __arm64_sys_mkdirat+0x8c/0xa4 fs/namei.c:4414
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:744
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:763
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
---[ end trace ]---
jfs_rmdir: dtDelete returned -2
pimreg: entered allmulticast mode