BUG at fs/jfs/jfs_txnmgr.c:662 assert(last)
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kernel BUG at fs/jfs/jfs_txnmgr.c:662!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 4439 Comm: syz.4.36 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:txLock+0x1a0d/0x1b10 fs/jfs/jfs_txnmgr.c:662
Code: fe e9 48 f8 ff ff e8 52 89 a6 fe 48 c7 c7 80 6a 62 8a 48 c7 c6 79 66 62 8a ba 96 02 00 00 48 c7 c1 80 6b 62 8a e8 c3 e8 de 06 <0f> 0b e8 2c 89 a6 fe 48 c7 c7 40 6c 62 8a e8 b0 e8 de 06 48 c7 c7
RSP: 0018:ffffc9000336f430 EFLAGS: 00010246
RAX: 000000000000002b RBX: 0000000000000000 RCX: 0f1b93e2c229e800
RDX: ffffc9000fc9c000 RSI: 000000000000a566 RDI: 000000000000a567
RBP: 0000000000000000 R08: ffff8880b9033d7f R09: 1ffff110172067af
R10: dffffc0000000000 R11: ffffed10172067b0 R12: 0000000000000000
R13: ffffc900027d2000 R14: ffffc900027d2000 R15: 1ffff920004fa400
FS:  00007f88df7346c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4b4059c000 CR3: 000000001f1c1000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 diWrite+0x43c/0x1610 fs/jfs/jfs_imap.c:654
 txCommit+0x869/0x5200 fs/jfs/jfs_txnmgr.c:1256
 jfs_create+0x8df/0xad0 fs/jfs/namei.c:156
 lookup_open fs/namei.c:3470 [inline]
 open_last_lookups fs/namei.c:3540 [inline]
 path_openat+0x11db/0x2fa0 fs/namei.c:3747
 do_filp_open+0x1e2/0x410 fs/namei.c:3777
 do_sys_openat2+0x150/0x4b0 fs/open.c:1255
 do_sys_open fs/open.c:1271 [inline]
 __do_sys_openat fs/open.c:1287 [inline]
 __se_sys_openat fs/open.c:1282 [inline]
 __x64_sys_openat+0x135/0x160 fs/open.c:1282
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f88e14fb629
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:00007f88df734028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f88e1775090 RCX: 00007f88e14fb629
RDX: 0000000000000042 RSI: 0000200000000040 RDI: ffffffffffffff9c
RBP: 00007f88e1591b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f88e1775128 R14: 00007f88e1775090 R15: 00007ffe12f12cc8
 </TASK>
Modules linked in:
---[ end trace 021aba7303bbdc68 ]---
RIP: 0010:txLock+0x1a0d/0x1b10 fs/jfs/jfs_txnmgr.c:662
Code: fe e9 48 f8 ff ff e8 52 89 a6 fe 48 c7 c7 80 6a 62 8a 48 c7 c6 79 66 62 8a ba 96 02 00 00 48 c7 c1 80 6b 62 8a e8 c3 e8 de 06 <0f> 0b e8 2c 89 a6 fe 48 c7 c7 40 6c 62 8a e8 b0 e8 de 06 48 c7 c7
RSP: 0018:ffffc9000336f430 EFLAGS: 00010246
RAX: 000000000000002b RBX: 0000000000000000 RCX: 0f1b93e2c229e800
RDX: ffffc9000fc9c000 RSI: 000000000000a566 RDI: 000000000000a567
RBP: 0000000000000000 R08: ffff8880b9033d7f R09: 1ffff110172067af
R10: dffffc0000000000 R11: ffffed10172067b0 R12: 0000000000000000
R13: ffffc900027d2000 R14: ffffc900027d2000 R15: 1ffff920004fa400
FS:  00007f88df7346c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4b4059b000 CR3: 000000001f1c1000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400