BUG at fs/jfs/jfs_txnmgr.c:662 assert(last)
------------[ cut here ]------------
kernel BUG at fs/jfs/jfs_txnmgr.c:662!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 11863 Comm: syz.1.660 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
RIP: 0010:txLock+0x1b92/0x1cc0 fs/jfs/jfs_txnmgr.c:662
Code: e9 6a f8 ff ff e8 5e c9 75 fe 48 c7 c7 20 62 6a 8b 48 c7 c6 19 5e 6a 8b ba 96 02 00 00 48 c7 c1 40 63 6a 8b e8 ef eb d9 fd 90 <0f> 0b e8 37 c9 75 fe 48 c7 c7 00 64 6a 8b e8 db eb d9 fd 48 c7 c7
RSP: 0018:ffffc90014a9f540 EFLAGS: 00010246
RAX: 000000000000002b RBX: 0000000000000000 RCX: cd859c4600ad6200
RDX: ffffc90013acf000 RSI: 0000000000003b59 RDI: 0000000000003b5a
RBP: ffffc90014a9f678 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52002953e59 R12: 1ffff920006a5400
R13: ffffc9000352a000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007fd577f056c0(0000) GS:ffff8881266c9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5237b28000 CR3: 000000003a774000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 dtSplitRoot+0x36f/0x16c0 fs/jfs/jfs_dtree.c:1927
 dtSplitUp fs/jfs/jfs_dtree.c:993 [inline]
 dtInsert+0xf19/0x5f10 fs/jfs/jfs_dtree.c:871
 jfs_mkdir+0x783/0xb00 fs/jfs/namei.c:270
 vfs_mkdir+0x75d/0x870 fs/namei.c:5139
 do_mkdirat+0x281/0x4c0 fs/namei.c:5173
 __do_sys_mkdirat fs/namei.c:5195 [inline]
 __se_sys_mkdirat fs/namei.c:5193 [inline]
 __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:5193
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd579cc9e57
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:00007fd577f04e58 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007fd577f04ee0 RCX: 00007fd579cc9e57
RDX: 00000000000001ff RSI: 00002000000005c0 RDI: 00000000ffffff9c
RBP: 0000200000000080 R08: 0000200000000140 R09: 0000000000000000
R10: 0000200000000080 R11: 0000000000000246 R12: 00002000000005c0
R13: 00007fd577f04ea0 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:txLock+0x1b92/0x1cc0 fs/jfs/jfs_txnmgr.c:662
Code: e9 6a f8 ff ff e8 5e c9 75 fe 48 c7 c7 20 62 6a 8b 48 c7 c6 19 5e 6a 8b ba 96 02 00 00 48 c7 c1 40 63 6a 8b e8 ef eb d9 fd 90 <0f> 0b e8 37 c9 75 fe 48 c7 c7 00 64 6a 8b e8 db eb d9 fd 48 c7 c7
RSP: 0018:ffffc90014a9f540 EFLAGS: 00010246
RAX: 000000000000002b RBX: 0000000000000000 RCX: cd859c4600ad6200
RDX: ffffc90013acf000 RSI: 0000000000003b59 RDI: 0000000000003b5a
RBP: ffffc90014a9f678 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52002953e59 R12: 1ffff920006a5400
R13: ffffc9000352a000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007fd577f056c0(0000) GS:ffff8881266c9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5237b28000 CR3: 000000003a774000 CR4: 00000000003526f0