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!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 6042 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:dbFindBits+0x145/0x170 fs/jfs/jfs_dmap.c:3036
Code: 45 31 ed eb e6 e8 4b 51 70 fe 48 c7 c1 60 7e ce 8b ba dc 0b 00 00 48 c7 c6 a0 7d ce 8b 48 c7 c7 20 7e ce 8b e8 2c a5 4e fe 90 <0f> 0b e8 24 51 70 fe 48 c7 c1 e0 7d ce 8b ba cd 0b 00 00 48 c7 c6
RSP: 0018:ffffc90003306f60 EFLAGS: 00010282
RAX: 0000000000000030 RBX: 0000000000000000 RCX: ffffffff819b6199
RDX: 0000000000000000 RSI: ffffffff819bdcc6 RDI: 0000000000000005
RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000000 R11: 0000000000000001 R12: 0000000000000001
R13: 0000000000000020 R14: 00000000ffffffff R15: 00000000000000ff
FS:  0000555576792500(0000) GS:ffff888124a09000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000561503f83950 CR3: 00000000786bf000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 dbAllocDmapLev+0x23f/0x2f0 fs/jfs/jfs_dmap.c:1985
 dbAllocCtl+0x173/0x810 fs/jfs/jfs_dmap.c:1825
 dbAllocAG+0x926/0xde0 fs/jfs/jfs_dmap.c:1353
 dbAlloc+0x417/0xac0 fs/jfs/jfs_dmap.c:877
 dtSplitUp+0x3f4/0x5970 fs/jfs/jfs_dtree.c:982
 dtInsert+0x8dd/0xb60 fs/jfs/jfs_dtree.c:871
 jfs_create+0x645/0xb60 fs/jfs/namei.c:137
 lookup_open.isra.0+0x11d3/0x1580 fs/namei.c:3796
 open_last_lookups fs/namei.c:3895 [inline]
 path_openat+0x893/0x2cb0 fs/namei.c:4131
 do_filp_open+0x20b/0x470 fs/namei.c:4161
 do_sys_openat2+0x11b/0x1d0 fs/open.c:1437
 do_sys_open fs/open.c:1452 [inline]
 __do_sys_openat fs/open.c:1468 [inline]
 __se_sys_openat fs/open.c:1463 [inline]
 __x64_sys_openat+0x174/0x210 fs/open.c:1463
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0904f8efc9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffda63dbae8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f09051e5fa0 RCX: 00007f0904f8efc9
RDX: 000000000000275a RSI: 00002000000002c0 RDI: ffffffffffffff9c
RBP: 00007f0905011f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f09051e5fa0 R14: 00007f09051e5fa0 R15: 0000000000000004
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:dbFindBits+0x145/0x170 fs/jfs/jfs_dmap.c:3036
Code: 45 31 ed eb e6 e8 4b 51 70 fe 48 c7 c1 60 7e ce 8b ba dc 0b 00 00 48 c7 c6 a0 7d ce 8b 48 c7 c7 20 7e ce 8b e8 2c a5 4e fe 90 <0f> 0b e8 24 51 70 fe 48 c7 c1 e0 7d ce 8b ba cd 0b 00 00 48 c7 c6
RSP: 0018:ffffc90003306f60 EFLAGS: 00010282
RAX: 0000000000000030 RBX: 0000000000000000 RCX: ffffffff819b6199
RDX: 0000000000000000 RSI: ffffffff819bdcc6 RDI: 0000000000000005
RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000000 R11: 0000000000000001 R12: 0000000000000001
R13: 0000000000000020 R14: 00000000ffffffff R15: 00000000000000ff
FS:  0000555576792500(0000) GS:ffff888124a09000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000561503f83950 CR3: 00000000786bf000 CR4: 0000000000350ef0