BUG at fs/jfs/jfs_txnmgr.c:662 assert(last)
------------[ cut here ]------------
kernel BUG at fs/jfs/jfs_txnmgr.c:662!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 6517 Comm: syz.2.124 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:txLock+0x1cc1/0x2090 fs/jfs/jfs_txnmgr.c:662
Code: fe e9 29 f8 ff ff e8 ae 78 84 fe 48 c7 c7 00 10 e4 8a 48 c7 c6 f9 0b e4 8a ba 96 02 00 00 48 c7 c1 00 11 e4 8a e8 2f 13 5b 07 <0f> 0b e8 88 78 84 fe 48 c7 c7 c0 11 e4 8a e8 1c 13 5b 07 48 c7 c7
RSP: 0018:ffffc9001bccf1a0 EFLAGS: 00010246
RAX: 000000000000002b RBX: ffffc9000287a000 RCX: 0053ceefaac64e00
RDX: ffffc900110e6000 RSI: 000000000000be56 RDI: 000000000000be57
RBP: ffffc9001bccf2f8 R08: ffffc9001bcceda7 R09: 1ffff92003799db4
R10: dffffc0000000000 R11: fffff52003799db5 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 1ffff9200050f400
FS:  00007f695f1f46c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f695edd0f98 CR3: 000000004aea1000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 dtSplitRoot+0x370/0x16b0 fs/jfs/jfs_dtree.c:1927
 dtSplitUp fs/jfs/jfs_dtree.c:993 [inline]
 dtInsert+0xeec/0x5f40 fs/jfs/jfs_dtree.c:871
 jfs_create+0x6a1/0xa40 fs/jfs/namei.c:137
 lookup_open fs/namei.c:3496 [inline]
 open_last_lookups fs/namei.c:3564 [inline]
 path_openat+0x1277/0x3190 fs/namei.c:3794
 do_filp_open+0x1c5/0x3d0 fs/namei.c:3824
 do_sys_openat2+0x12c/0x1c0 fs/open.c:1421
 do_sys_open fs/open.c:1436 [inline]
 __do_sys_openat fs/open.c:1452 [inline]
 __se_sys_openat fs/open.c:1447 [inline]
 __x64_sys_openat+0x139/0x160 fs/open.c:1447
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f696138f749
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:00007f695f1f4038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f69615e6270 RCX: 00007f696138f749
RDX: 000000000000275a RSI: 0000200000000100 RDI: ffffffffffffff9c
RBP: 00007f6961413f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f69615e6308 R14: 00007f69615e6270 R15: 00007ffca274e6d8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:txLock+0x1cc1/0x2090 fs/jfs/jfs_txnmgr.c:662
Code: fe e9 29 f8 ff ff e8 ae 78 84 fe 48 c7 c7 00 10 e4 8a 48 c7 c6 f9 0b e4 8a ba 96 02 00 00 48 c7 c1 00 11 e4 8a e8 2f 13 5b 07 <0f> 0b e8 88 78 84 fe 48 c7 c7 c0 11 e4 8a e8 1c 13 5b 07 48 c7 c7
RSP: 0018:ffffc9001bccf1a0 EFLAGS: 00010246
RAX: 000000000000002b RBX: ffffc9000287a000 RCX: 0053ceefaac64e00
RDX: ffffc900110e6000 RSI: 000000000000be56 RDI: 000000000000be57
RBP: ffffc9001bccf2f8 R08: ffffc9001bcceda7 R09: 1ffff92003799db4
R10: dffffc0000000000 R11: fffff52003799db5 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 1ffff9200050f400
FS:  00007f695f1f46c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f695edd0f98 CR3: 000000004aea1000 CR4: 00000000003506f0