BUG at fs/jfs/jfs_txnmgr.c:662 assert(last)
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kernel BUG at fs/jfs/jfs_txnmgr.c:662!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 9421 Comm: syz.0.436 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:txLock+0x1b92/0x1cc0 fs/jfs/jfs_txnmgr.c:662
Code: e9 6a f8 ff ff e8 7e b8 6f fe 48 c7 c7 60 e1 8a 8b 48 c7 c6 59 dd 8a 8b ba 96 02 00 00 48 c7 c1 80 e2 8a 8b e8 4f 96 d2 fd 90 <0f> 0b e8 57 b8 6f fe 48 c7 c7 40 e3 8a 8b e8 3b 96 d2 fd 48 c7 c7
RSP: 0018:ffffc9000731eb20 EFLAGS: 00010246
RAX: 000000000000002b RBX: 0000000000000000 RCX: 39ee62b0b982af00
RDX: ffffc9001cc76000 RSI: 00000000000067e8 RDI: 00000000000067e9
RBP: ffffc9000731ec48 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52000e63d15 R12: 1ffff920006a1400
R13: ffffc9000350a000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007fb94e8fd6c0(0000) GS:ffff888126432000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7554dbb000 CR3: 000000002ac86000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 diWrite+0x444/0x1f40 fs/jfs/jfs_imap.c:654
 txCommit+0x869/0x5410 fs/jfs/jfs_txnmgr.c:1256
 jfs_commit_inode+0x2ef/0x530 fs/jfs/inode.c:114
 extAlloc+0xc95/0x1020 fs/jfs/jfs_extent.c:177
 jfs_get_block+0x358/0xad0 fs/jfs/inode.c:254
 __block_write_begin_int+0x6c6/0x1910 fs/buffer.c:2142
 block_write_begin+0x8d/0x120 fs/buffer.c:2253
 jfs_write_begin+0x35/0x80 fs/jfs/inode.c:306
 generic_perform_write+0x2af/0x8b0 mm/filemap.c:4324
 __generic_file_write_iter+0x1b1/0x240 mm/filemap.c:4438
 generic_file_write_iter+0x14b/0x690 mm/filemap.c:4467
 iter_file_splice_write+0x9a6/0x10f0 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+0x545/0xc80 fs/splice.c:1103
 do_splice_direct_actor fs/splice.c:1202 [inline]
 do_splice_direct+0x19b/0x2a0 fs/splice.c:1228
 do_sendfile+0x547/0x7e0 fs/read_write.c:1372
 __do_sys_sendfile64 fs/read_write.c:1433 [inline]
 __se_sys_sendfile64+0x144/0x1a0 fs/read_write.c:1419
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb9506cc819
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:00007fb94e8fd028 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007fb950946090 RCX: 00007fb9506cc819
RDX: 0000000000000000 RSI: 000000000000000a RDI: 0000000000000009
RBP: 00007fb950762c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000020fffe82 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb950946128 R14: 00007fb950946090 R15: 00007ffd59117d98
 </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 7e b8 6f fe 48 c7 c7 60 e1 8a 8b 48 c7 c6 59 dd 8a 8b ba 96 02 00 00 48 c7 c1 80 e2 8a 8b e8 4f 96 d2 fd 90 <0f> 0b e8 57 b8 6f fe 48 c7 c7 40 e3 8a 8b e8 3b 96 d2 fd 48 c7 c7
RSP: 0018:ffffc9000731eb20 EFLAGS: 00010246
RAX: 000000000000002b RBX: 0000000000000000 RCX: 39ee62b0b982af00
RDX: ffffc9001cc76000 RSI: 00000000000067e8 RDI: 00000000000067e9
RBP: ffffc9000731ec48 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52000e63d15 R12: 1ffff920006a1400
R13: ffffc9000350a000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007fb94e8fd6c0(0000) GS:ffff888126432000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7554dbb000 CR3: 000000002ac86000 CR4: 00000000003526f0