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: 1 UID: 0 PID: 14920 Comm: syz.5.1040 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 b9 61 fe 48 c7 c7 e0 20 ad 8b 48 c7 c6 20 1e ad 8b ba 33 0c 00 00 48 c7 c1 20 29 ad 8b e8 e3 85 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:ffffc9000462f598 EFLAGS: 00010246
RAX: 0000000000000030 RBX: 0000000000000000 RCX: 54d911bdfd6e7500
RDX: ffffc9000762a000 RSI: 0000000000002482 RDI: 0000000000002483
RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff520008c5e65 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000020
FS:  00007fadfe2116c0(0000) GS:ffff888125ccb000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9181f00b30 CR3: 00000000636a6000 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+0x408/0x620 fs/namei.c:5410
 filename_mkdirat+0x289/0x520 fs/namei.c:5443
 __do_sys_mkdirat fs/namei.c:5464 [inline]
 __se_sys_mkdirat+0x35/0x150 fs/namei.c:5461
 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: 0033:0x7fae0041cfc7
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:00007fadfe210e58 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007fadfe210ee0 RCX: 00007fae0041cfc7
RDX: 00000000000001ff RSI: 0000200000000280 RDI: 00000000ffffff9c
RBP: 0000200000000240 R08: 00002000000007c0 R09: 0000000000000000
R10: 0000200000000240 R11: 0000000000000246 R12: 0000200000000280
R13: 00007fadfe210ea0 R14: 0000000000000000 R15: 0000000000000000
 </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 b9 61 fe 48 c7 c7 e0 20 ad 8b 48 c7 c6 20 1e ad 8b ba 33 0c 00 00 48 c7 c1 20 29 ad 8b e8 e3 85 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:ffffc9000462f598 EFLAGS: 00010246
RAX: 0000000000000030 RBX: 0000000000000000 RCX: 54d911bdfd6e7500
RDX: ffffc9000762a000 RSI: 0000000000002482 RDI: 0000000000002483
RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff520008c5e65 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000020
FS:  00007fadfe2116c0(0000) GS:ffff888125ccb000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9181f97286 CR3: 00000000636a6000 CR4: 00000000003526f0