BUG at fs/jfs/jfs_txnmgr.c:663 assert(last)
---------[ 1286.247465][ T1348] ------------[ cut here ]------------
kernel BUG at fs/jfs/jfs_txnmgr.c:663!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 1348 Comm: syz.1.2503 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 95 8e 66 fe 48 c7 c7 20 ec 8b 8b 48 c7 c6 19 e8 8b 8b ba 97 02 00 00 48 c7 c1 40 ed 8b 8b e8 36 eb c8 fd 90 <0f> 0b e8 6e 8e 66 fe 48 c7 c7 00 ee 8b 8b e8 22 eb c8 fd 48 c7 c7
RSP: 0018:ffffc900072beb60 EFLAGS: 00010246
RAX: 000000000000002b RBX: 0000000000000000 RCX: 63cc6d68c9aef200
RDX: ffffc90016af8000 RSI: 000000000000341e RDI: 000000000000341f
RBP: ffffc900072bec90 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52000e57d1d R12: 0000000000000000
R13: ffffc90003422000 R14: 0000000000000000 R15: 1ffff92000684400
FS:  00007fbfd2b0e6c0(0000) GS:ffff888126142000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f492e8fafe8 CR3: 0000000021b2c000 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
 get_more_blocks fs/direct-io.c:644 [inline]
 do_direct_IO fs/direct-io.c:932 [inline]
 __blockdev_direct_IO+0x1965/0x33d0 fs/direct-io.c:1236
 blockdev_direct_IO include/linux/fs.h:3135 [inline]
 jfs_direct_IO+0x11b/0x220 fs/jfs/inode.c:339
 generic_file_direct_write+0x1d1/0x3f0 mm/filemap.c:4297
 __generic_file_write_iter+0x120/0x240 mm/filemap.c:4466
 generic_file_write_iter+0xaf/0x330 mm/filemap.c:4506
 iter_file_splice_write+0xa36/0x1240 fs/splice.c:736
 do_splice_from fs/splice.c:936 [inline]
 direct_splice_actor+0x104/0x160 fs/splice.c:1159
 splice_direct_to_actor+0x586/0xcc0 fs/splice.c:1103
 do_splice_direct_actor fs/splice.c:1202 [inline]
 do_splice_direct+0x19b/0x2a0 fs/splice.c:1228
 do_sendfile+0x540/0x7e0 fs/read_write.c:1371
 __do_sys_sendfile64 fs/read_write.c:1432 [inline]
 __se_sys_sendfile64+0x144/0x1a0 fs/read_write.c:1418
 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: 0033:0x7fbfd48bce59
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:00007fbfd2b0e028 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007fbfd4b35fa0 RCX: 00007fbfd48bce59
RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000006
RBP: 00007fbfd4952e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000020fffe82 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbfd4b36038 R14: 00007fbfd4b35fa0 R15: 00007ffef7299688
 </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 95 8e 66 fe 48 c7 c7 20 ec 8b 8b 48 c7 c6 19 e8 8b 8b ba 97 02 00 00 48 c7 c1 40 ed 8b 8b e8 36 eb c8 fd 90 <0f> 0b e8 6e 8e 66 fe 48 c7 c7 00 ee 8b 8b e8 22 eb c8 fd 48 c7 c7
RSP: 0018:ffffc900072beb60 EFLAGS: 00010246
RAX: 000000000000002b RBX: 0000000000000000 RCX: 63cc6d68c9aef200
RDX: ffffc90016af8000 RSI: 000000000000341e RDI: 000000000000341f
RBP: ffffc900072bec90 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52000e57d1d R12: 0000000000000000
R13: ffffc90003422000 R14: 0000000000000000 R15: 1ffff92000684400
FS:  00007fbfd2b0e6c0(0000) GS:ffff888126242000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055bafbeab950 CR3: 0000000021b2c000 CR4: 00000000003526f0