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: 1 UID: 0 PID: 6143 Comm: syz.1.56 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/15/2026
RIP: 0010:dbFindBits+0x19e/0x1a0 fs/jfs/jfs_dmap.c:3123
Code: b4 fd 90 0f 0b e8 72 97 54 fe 48 c7 c7 60 e6 cd 8b 48 c7 c6 a0 e3 cd 8b ba 33 0c 00 00 48 c7 c1 a0 ee cd 8b e8 c3 25 b4 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:ffffc900074e71f8 EFLAGS: 00010246
RAX: 0000000000000030 RBX: 0000000000000000 RCX: 272a6970332fbd00
RDX: ffffc9000fd33000 RSI: 0000000000000b83 RDI: 0000000000000b84
RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52000e9cdf1 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000020
FS:  00007fc7919056c0(0000) GS:ffff888124811000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055d399157a10 CR3: 000000005d28e000 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_create+0x730/0xae0 fs/jfs/namei.c:138
 lookup_open+0x103d/0x1b00 fs/namei.c:4575
 open_last_lookups fs/namei.c:4774 [inline]
 path_openat+0x711/0x2100 fs/namei.c:5013
 do_file_open+0x23e/0x4a0 fs/namei.c:5045
 do_sys_openat2+0x115/0x200 fs/open.c:1443
 do_sys_open fs/open.c:1449 [inline]
 __do_sys_openat fs/open.c:1465 [inline]
 __se_sys_openat fs/open.c:1460 [inline]
 __x64_sys_openat+0x138/0x170 fs/open.c:1460
 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: 0033:0x7fc7936cfb19
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:00007fc791905028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fc793956090 RCX: 00007fc7936cfb19
RDX: 000000000000275a RSI: 0000200000000480 RDI: ffffffffffffff9c
RBP: 00007fc793767b70 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc793956128 R14: 00007fc793956090 R15: 00007fff3f0fbfe8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:dbFindBits+0x19e/0x1a0 fs/jfs/jfs_dmap.c:3123
Code: b4 fd 90 0f 0b e8 72 97 54 fe 48 c7 c7 60 e6 cd 8b 48 c7 c6 a0 e3 cd 8b ba 33 0c 00 00 48 c7 c1 a0 ee cd 8b e8 c3 25 b4 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:ffffc900074e71f8 EFLAGS: 00010246
RAX: 0000000000000030 RBX: 0000000000000000 RCX: 272a6970332fbd00
RDX: ffffc9000fd33000 RSI: 0000000000000b83 RDI: 0000000000000b84
RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52000e9cdf1 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000020
FS:  00007fc7919056c0(0000) GS:ffff888124811000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055d399157a10 CR3: 000000005d28e000 CR4: 00000000003526f0