BUG at fs/jfs/jfs_txnmgr.c:663 assert(las[  201.957141][ T8697] BUG at fs/jfs/jfs_txnmgr.c:663 assert(last)
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kernel BUG at fs/jfs/jfs_txnmgr.c:663!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 8697 Comm: syz.4.382 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:txLock+0x1bdb/0x1d10 fs/jfs/jfs_txnmgr.c:663
Code: e9 c5 f7 ff ff e8 35 9f 66 fe 48 c7 c7 60 eb 8b 8b 48 c7 c6 59 e7 8b 8b ba 97 02 00 00 48 c7 c1 80 ec 8b 8b e8 56 f8 c8 fd 90 <0f> 0b e8 0e 9f 66 fe 48 c7 c7 40 ed 8b 8b e8 42 f8 c8 fd 48 c7 c7
RSP: 0000:ffffc90005c77200 EFLAGS: 00010246
RAX: 000000000000002b RBX: 0000000000000000 RCX: 516431f0d2609900
RDX: ffffc9000ed59000 RSI: 0000000000007b65 RDI: 0000000000007b66
RBP: ffffc90005c77330 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52000b8edf1 R12: 0000000000000000
R13: ffffc9000339a000 R14: 0000000000000000 R15: 1ffff92000673400
FS:  00007f13516266c0(0000) GS:ffff888126244000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000016000 CR3: 000000005edb6000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 diWrite+0x444/0x1f60 fs/jfs/jfs_imap.c:654
 txCommit+0x83a/0x54a0 fs/jfs/jfs_txnmgr.c:1257
 jfs_commit_inode+0x2ef/0x530 fs/jfs/inode.c:114
 extAlloc+0xc82/0x1010 fs/jfs/jfs_extent.c:177
 jfs_get_block+0x351/0xad0 fs/jfs/inode.c:254
 __block_write_begin_int+0x6c2/0x1900 fs/buffer.c:2123
 block_write_begin+0x8d/0x120 fs/buffer.c:2234
 jfs_write_begin+0x35/0x80 fs/jfs/inode.c:306
 generic_perform_write+0x2ad/0x8b0 mm/filemap.c:4363
 generic_file_write_iter+0xaf/0x330 mm/filemap.c:4506
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x61e/0xbb0 fs/read_write.c:687
 ksys_write+0x156/0x270 fs/read_write.c:739
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f13533cce59
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:00007f1351626028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f1353645fa0 RCX: 00007f13533cce59
RDX: 000000000003261e RSI: 0000200000000000 RDI: 0000000000000006
RBP: 00007f1353462e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1353646038 R14: 00007f1353645fa0 R15: 00007fff6f29c218
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:txLock+0x1bdb/0x1d10 fs/jfs/jfs_txnmgr.c:663
Code: e9 c5 f7 ff ff e8 35 9f 66 fe 48 c7 c7 60 eb 8b 8b 48 c7 c6 59 e7 8b 8b ba 97 02 00 00 48 c7 c1 80 ec 8b 8b e8 56 f8 c8 fd 90 <0f> 0b e8 0e 9f 66 fe 48 c7 c7 40 ed 8b 8b e8 42 f8 c8 fd 48 c7 c7
RSP: 0000:ffffc90005c77200 EFLAGS: 00010246
RAX: 000000000000002b RBX: 0000000000000000 RCX: 516431f0d2609900
RDX: ffffc9000ed59000 RSI: 0000000000007b65 RDI: 0000000000007b66
RBP: ffffc90005c77330 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52000b8edf1 R12: 0000000000000000
R13: ffffc9000339a000 R14: 0000000000000000 R15: 1ffff92000673400
FS:  00007f13516266c0(0000) GS:ffff888126244000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000016000 CR3: 000000005edb6000 CR4: 00000000003526f0