BUG at fs/jfs/jfs_dmap.c:3123 assert(bitno < 32)
------------[ cut here ]------------
kernel BUG at fs/jfs/jfs_dmap.c:3123!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 13331 Comm: syz.6.866 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:dbFindBits+0x19e/0x1a0 fs/jfs/jfs_dmap.c:3123
Code: c2 fd 90 0f 0b e8 92 84 61 fe 48 c7 c7 e0 37 ad 8b 48 c7 c6 20 35 ad 8b ba 33 0c 00 00 48 c7 c1 20 40 ad 8b e8 03 26 c2 fd 90 <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 41 57 41
RSP: 0018:ffffc900053d7598 EFLAGS: 00010246
RAX: 0000000000000030 RBX: 0000000000000000 RCX: 56dd275efc4cb700
RDX: ffffc900109b3000 RSI: 000000000000189e RDI: 000000000000189f
RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52000a7ae65 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000020
FS:  00007f9a9fde56c0(0000) GS:ffff888125bc4000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9a979b8000 CR3: 0000000060c5e000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 dbAllocDmapLev+0x161/0x3b0 fs/jfs/jfs_dmap.c:2072
 dbAllocCtl+0x145/0x990 fs/jfs/jfs_dmap.c:1912
 dbAllocAG+0x1f4/0xf80 fs/jfs/jfs_dmap.c:1440
 dbAlloc+0x5ab/0xba0 fs/jfs/jfs_dmap.c:964
 dtSplitUp fs/jfs/jfs_dtree.c:979 [inline]
 dtInsert+0xb31/0x5cb0 fs/jfs/jfs_dtree.c:868
 jfs_link+0x370/0x610 fs/jfs/namei.c:827
 vfs_link+0x491/0x650 fs/namei.c:5925
 filename_linkat+0x26d/0x5f0 fs/namei.c:5993
 __do_sys_link fs/namei.c:6026 [inline]
 __se_sys_link+0x55/0x2c0 fs/namei.c:6022
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9aa1bae159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f9a9fde5028 EFLAGS: 00000246 ORIG_RAX: 0000000000000056
RAX: ffffffffffffffda RBX: 00007f9aa1e36090 RCX: 00007f9aa1bae159
RDX: 0000000000000000 RSI: 0000200000000240 RDI: 0000200000000400
RBP: 00007f9aa1c4506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9aa1e36128 R14: 00007f9aa1e36090 R15: 00007ffedf3e6e58
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:dbFindBits+0x19e/0x1a0 fs/jfs/jfs_dmap.c:3123
Code: c2 fd 90 0f 0b e8 92 84 61 fe 48 c7 c7 e0 37 ad 8b 48 c7 c6 20 35 ad 8b ba 33 0c 00 00 48 c7 c1 20 40 ad 8b e8 03 26 c2 fd 90 <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 41 57 41
RSP: 0018:ffffc900053d7598 EFLAGS: 00010246
RAX: 0000000000000030 RBX: 0000000000000000 RCX: 56dd275efc4cb700
RDX: ffffc900109b3000 RSI: 000000000000189e RDI: 000000000000189f
RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52000a7ae65 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000020
FS:  00007f9a9fde56c0(0000) GS:ffff888125bc4000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9a9f9a1d58 CR3: 0000000060c5e000 CR4: 00000000003526f0