BUG at fs/jfs/jfs_dmap.c:3024 assert(bitno < 32)
------------[ cut here ]------------
kernel BUG at fs/jfs/jfs_dmap.c:3024!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 6452 Comm: syz.4.81 Not tainted 6.15.0-rc5-syzkaller-00043-gd76bb1ebb558 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/29/2025
RIP: 0010:dbFindBits+0x19e/0x1a0 fs/jfs/jfs_dmap.c:3024
Code: f0 fd 90 0f 0b e8 92 44 88 fe 48 c7 c7 80 50 a3 8b 48 c7 c6 c0 4d a3 8b ba d0 0b 00 00 48 c7 c1 60 58 a3 8b e8 f3 01 f0 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:ffffc90002f77590 EFLAGS: 00010246
RAX: 0000000000000030 RBX: 0000000000000000 RCX: 1055c6672150da00
RDX: ffffc9000e382000 RSI: 0000000000003568 RDI: 0000000000003569
RBP: 00000000ffffffff R08: ffffc90002f77267 R09: 1ffff920005eee4c
R10: dffffc0000000000 R11: fffff520005eee4d R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000020
FS:  00007f0b8a82d6c0(0000) GS:ffff8881260fe000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2fb1d57000 CR3: 000000002fc6a000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 dbAllocDmapLev+0x16b/0x3c0 fs/jfs/jfs_dmap.c:1973
 dbAllocCtl+0x14a/0x9b0 fs/jfs/jfs_dmap.c:1813
 dbAllocAG+0x1e8/0xf10 fs/jfs/jfs_dmap.c:1349
 dbAlloc+0x5a8/0xba0 fs/jfs/jfs_dmap.c:873
 dtSplitUp fs/jfs/jfs_dtree.c:982 [inline]
 dtInsert+0xad5/0x5f40 fs/jfs/jfs_dtree.c:871
 jfs_link+0x312/0x550 fs/jfs/namei.c:826
 vfs_link+0x4ea/0x6e0 fs/namei.c:4847
 do_linkat+0x272/0x560 fs/namei.c:4917
 __do_sys_link fs/namei.c:4951 [inline]
 __se_sys_link fs/namei.c:4949 [inline]
 __x64_sys_link+0x82/0x90 fs/namei.c:4949
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0b8998e969
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:00007f0b8a82d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000056
RAX: ffffffffffffffda RBX: 00007f0b89bb5fa0 RCX: 00007f0b8998e969
RDX: 0000000000000000 RSI: 0000200000000240 RDI: 00002000000001c0
RBP: 00007f0b89a10ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f0b89bb5fa0 R15: 00007ffcddcd1538
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:dbFindBits+0x19e/0x1a0 fs/jfs/jfs_dmap.c:3024
Code: f0 fd 90 0f 0b e8 92 44 88 fe 48 c7 c7 80 50 a3 8b 48 c7 c6 c0 4d a3 8b ba d0 0b 00 00 48 c7 c1 60 58 a3 8b e8 f3 01 f0 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:ffffc90002f77590 EFLAGS: 00010246
RAX: 0000000000000030 RBX: 0000000000000000 RCX: 1055c6672150da00
RDX: ffffc9000e382000 RSI: 0000000000003568 RDI: 0000000000003569
RBP: 00000000ffffffff R08: ffffc90002f77267 R09: 1ffff920005eee4c
R10: dffffc0000000000 R11: fffff520005eee4d R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000020
FS:  00007f0b8a82d6c0(0000) GS:ffff8881260fe000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1a9362b2fe CR3: 000000002fc6a000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400