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: 1 UID: 0 PID: 5998 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:dbFindBits+0x145/0x170 fs/jfs/jfs_dmap.c:3036
Code: 45 31 ed eb e6 e8 7b 43 6b fe 48 c7 c1 60 ec cf 8b ba dc 0b 00 00 48 c7 c6 a0 eb cf 8b 48 c7 c7 20 ec cf 8b e8 1c d8 48 fe 90 <0f> 0b e8 54 43 6b fe 48 c7 c1 e0 eb cf 8b ba cd 0b 00 00 48 c7 c6
RSP: 0018:ffffc900041fef40 EFLAGS: 00010282
RAX: 0000000000000030 RBX: 0000000000000000 RCX: ffffffff819c8fa5
RDX: 0000000000000000 RSI: ffffffff819d0b89 RDI: 0000000000000005
RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000000 R11: ffff88802c03a9b0 R12: 0000000000000001
R13: 0000000000000020 R14: 00000000ffffffff R15: 00000000000000ff
FS:  0000555578a54500(0000) GS:ffff8881249f5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2fa63fff CR3: 0000000074bf0000 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+0x12dc/0x1780 fs/namei.c:4440
 open_last_lookups fs/namei.c:4540 [inline]
 path_openat+0xa95/0x3140 fs/namei.c:4784
 do_filp_open+0x20b/0x470 fs/namei.c:4814
 do_sys_openat2+0x121/0x290 fs/open.c:1430
 do_sys_open fs/open.c:1436 [inline]
 __do_sys_openat fs/open.c:1452 [inline]
 __se_sys_openat fs/open.c:1447 [inline]
 __x64_sys_openat+0x174/0x210 fs/open.c:1447
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd9bbb8f749
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:00007fffc0a34928 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fd9bbde5fa0 RCX: 00007fd9bbb8f749
RDX: 000000000000275a RSI: 0000200000000080 RDI: ffffffffffffff9c
RBP: 00007fd9bbc13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd9bbde5fa0 R14: 00007fd9bbde5fa0 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 7b 43 6b fe 48 c7 c1 60 ec cf 8b ba dc 0b 00 00 48 c7 c6 a0 eb cf 8b 48 c7 c7 20 ec cf 8b e8 1c d8 48 fe 90 <0f> 0b e8 54 43 6b fe 48 c7 c1 e0 eb cf 8b ba cd 0b 00 00 48 c7 c6
RSP: 0018:ffffc900041fef40 EFLAGS: 00010282
RAX: 0000000000000030 RBX: 0000000000000000 RCX: ffffffff819c8fa5
RDX: 0000000000000000 RSI: ffffffff819d0b89 RDI: 0000000000000005
RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000000 R11: ffff88802c03a9b0 R12: 0000000000000001
R13: 0000000000000020 R14: 00000000ffffffff R15: 00000000000000ff
FS:  0000555578a54500(0000) GS:ffff8881249f5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2fa63fff CR3: 0000000074bf0000 CR4: 0000000000350ef0