loop0: detected capacity change from 0 to 32768
BUG at fs/jfs/jfs_dmap.c:3036 assert(bitno < 32)
------------[ cut here ]------------
kernel BUG at fs/jfs/jfs_dmap.c:3036!
Internal error: Oops - BUG: 00000000f2000800 [#1]  SMP
Modules linked in:
CPU: 0 UID: 0 PID: 6760 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : dbFindBits+0x1ac/0x1b0 fs/jfs/jfs_dmap.c:3036
lr : dbFindBits+0x1ac/0x1b0 fs/jfs/jfs_dmap.c:3036
sp : ffff8000a1197440
x29: ffff8000a1197440 x28: 0000000000000000 x27: dfff800000000000
x26: ffff0000e0997800 x25: ffff0000e0997021 x24: 0000000000000000
x23: ffff80008fe9a410 x22: 0000000000000020 x21: 0000000000000001
x20: 00000000ffffffff x19: 0000000000000000 x18: 1fffe0003377d090
x17: ffff800093598000 x16: ffff800082e5c71c x15: 0000000000000001
x14: 1ffff00014232e04 x13: 0000000000000000 x12: 0000000000000000
x11: ffff700014232e05 x10: 0000000000ff0100 x9 : 799e2e1f38298700
x8 : 799e2e1f38298700 x7 : ffff800080575c38 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000807f0b34
x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000030
Call trace:
 dbFindBits+0x1ac/0x1b0 fs/jfs/jfs_dmap.c:3036 (P)
 dbAllocDmapLev+0x13c/0x36c fs/jfs/jfs_dmap.c:1985
 dbAllocCtl+0x130/0x8e0 fs/jfs/jfs_dmap.c:1825
 dbAllocAG+0x1c0/0xdc0 fs/jfs/jfs_dmap.c:1353
 dbAlloc+0x428/0x9dc fs/jfs/jfs_dmap.c:877
 diNewIAG fs/jfs/jfs_imap.c:2510 [inline]
 diAllocExt fs/jfs/jfs_imap.c:1905 [inline]
 diAllocAG+0x894/0x1a84 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+0x408/0x48c fs/namei.c:5130
 do_mkdirat+0x238/0x448 fs/namei.c:5164
 __do_sys_mkdirat fs/namei.c:5186 [inline]
 __se_sys_mkdirat fs/namei.c:5184 [inline]
 __arm64_sys_mkdirat+0x8c/0xa4 fs/namei.c:5184
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x5c/0x26c arch/arm64/kernel/entry-common.c:724
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
Code: d004bc83 91058063 52817b82 979252d5 (d4210000) 
---[ end trace 0000000000000000 ]---