loop0: detected capacity change from 0 to 32768
BUG at fs/jfs/jfs_dmap.c:3111 assert(bitno < 32)
------------[ cut here ]------------
kernel BUG at fs/jfs/jfs_dmap.c:3111!
Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 5021 Comm: syz.0.16 Not tainted 5.15.185-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : dbFindBits+0x1ac/0x1b0 fs/jfs/jfs_dmap.c:3111
lr : dbFindBits+0x1ac/0x1b0 fs/jfs/jfs_dmap.c:3111
sp : ffff80001f1f6fa0
x29: ffff80001f1f6fa0 x28: 00000000ffffffff x27: dfff800000000000
x26: ffff0000cec7f800 x25: ffff0000cec7f021 x24: 0000000000000000
x23: ffff8000146c7000 x22: 0000000000000020 x21: 0000000000000001
x20: 00000000ffffffff x19: 0000000000000000 x18: 0000000000000001
x17: 0000000000000000 x16: ffff8000111a97c4 x15: 00000000ffffffff
x14: 0000000000ff0100 x13: 0000000000000001 x12: 0000000000ff0100
x11: 0000000000000000 x10: 0000000000000000 x9 : 296e8e7ae3f79700
x8 : 296e8e7ae3f79700 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff80001f1f6898 x4 : ffff80001423f280 x3 : ffff80000a732684
x2 : ffff0001a10e9d10 x1 : 0000000100000000 x0 : 0000000000000030
Call trace:
 dbFindBits+0x1ac/0x1b0 fs/jfs/jfs_dmap.c:3111
 dbAllocDmapLev+0x13c/0x36c fs/jfs/jfs_dmap.c:2060
 dbAllocCtl+0x130/0x910 fs/jfs/jfs_dmap.c:1900
 dbAllocAG+0x1c4/0xd20 fs/jfs/jfs_dmap.c:1436
 dbAlloc+0x43c/0x978 fs/jfs/jfs_dmap.c:892
 dtSplitUp fs/jfs/jfs_dtree.c:980 [inline]
 dtInsert+0x800/0x5634 fs/jfs/jfs_dtree.c:869
 jfs_create+0x588/0x8c4 fs/jfs/namei.c:137
 lookup_open fs/namei.c:3462 [inline]
 open_last_lookups fs/namei.c:3532 [inline]
 path_openat+0x1144/0x26e4 fs/namei.c:3739
 do_filp_open+0x164/0x330 fs/namei.c:3769
 do_sys_openat2+0x128/0x3d8 fs/open.c:1253
 do_sys_open fs/open.c:1269 [inline]
 __do_sys_openat fs/open.c:1285 [inline]
 __se_sys_openat fs/open.c:1280 [inline]
 __arm64_sys_openat+0x120/0x154 fs/open.c:1280
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
Code: f003f543 91038063 528184e2 95e4d4da (d4210000) 
---[ end trace ee9e340599479beb ]---