BUG at fs/jfs/jfs_dmap.c:3123 assert(bitno < 32)
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kernel BUG at fs/jfs/jfs_dmap.c:3123!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 5932 Comm: syz.1.14 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
RIP: 0010:dbFindBits+0x19e/0x1a0 fs/jfs/jfs_dmap.c:3123
Code: ba fd 90 0f 0b e8 62 7d 5a fe 48 c7 c7 60 af cd 8b 48 c7 c6 a0 ac cd 8b ba 33 0c 00 00 48 c7 c1 a0 b7 cd 8b e8 f3 15 ba 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:ffffc900060bf598 EFLAGS: 00010246
RAX: 0000000000000030 RBX: 0000000000000000 RCX: 16b9abe69c8e1600
RDX: ffffc9001011f000 RSI: 0000000000002b22 RDI: 0000000000002b23
RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52000c17e65 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000020
FS:  00007fbaa3c356c0(0000) GS:ffff88812474a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055b3387f5af0 CR3: 0000000038514000 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_mkdir+0x764/0xaf0 fs/jfs/namei.c:271
 vfs_mkdir+0x414/0x630 fs/namei.c:5420
 filename_mkdirat+0x289/0x520 fs/namei.c:5453
 __do_sys_mkdirat fs/namei.c:5474 [inline]
 __se_sys_mkdirat+0x35/0x150 fs/namei.c:5471
 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: 0033:0x7fbaa59fe3c7
Code: 00 66 90 48 89 f2 b9 00 01 00 00 48 89 fe bf 9c ff ff ff e9 db f7 ff ff 66 2e 0f 1f 84 00 00 00 00 00 90 b8 02 01 00 00 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:00007fbaa3c34e58 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007fbaa3c34ee0 RCX: 00007fbaa59fe3c7
RDX: 00000000000001ff RSI: 000020000005f180 RDI: 00000000ffffff9c
RBP: 000020000005f140 R08: 000020000005f280 R09: 0000000000000000
R10: 000020000005f140 R11: 0000000000000246 R12: 000020000005f180
R13: 00007fbaa3c34ea0 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:dbFindBits+0x19e/0x1a0 fs/jfs/jfs_dmap.c:3123
Code: ba fd 90 0f 0b e8 62 7d 5a fe 48 c7 c7 60 af cd 8b 48 c7 c6 a0 ac cd 8b ba 33 0c 00 00 48 c7 c1 a0 b7 cd 8b e8 f3 15 ba 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:ffffc900060bf598 EFLAGS: 00010246
RAX: 0000000000000030 RBX: 0000000000000000 RCX: 16b9abe69c8e1600
RDX: ffffc9001011f000 RSI: 0000000000002b22 RDI: 0000000000002b23
RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52000c17e65 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000020
FS:  00007fbaa3c356c0(0000) GS:ffff88812484a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fef8e86d000 CR3: 0000000038514000 CR4: 00000000003526f0