UFO tlock:0xffffc9000354a0d8
BUG at fs/jfs/jfs_txnmgr.c:662 assert(last)
------------[ cut here ]------------
kernel BUG at fs/jfs/jfs_txnmgr.c:662!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 7121 Comm: syz.5.162 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:txLock+0x1b92/0x1cc0 fs/jfs/jfs_txnmgr.c:662
Code: e9 6a f8 ff ff e8 2e 02 70 fe 48 c7 c7 20 dc 8a 8b 48 c7 c6 19 d8 8a 8b ba 96 02 00 00 48 c7 c1 40 dd 8a 8b e8 ff ff d2 fd 90 <0f> 0b e8 07 02 70 fe 48 c7 c7 00 de 8a 8b e8 eb ff d2 fd 48 c7 c7
RSP: 0018:ffffc90004926fe0 EFLAGS: 00010246
RAX: 000000000000002b RBX: 0000000000000000 RCX: 84c0189a7d484c00
RDX: ffffc9001d851000 RSI: 0000000000001ad2 RDI: 0000000000001ad3
RBP: ffffc90004927108 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52000924dad R12: 1ffff920006a9400
R13: ffffc9000354a000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f66fab866c0(0000) GS:ffff88812633c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb5d8ee7e20 CR3: 000000002486e000 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:4319
 generic_file_write_iter+0x14b/0x690 mm/filemap.c:4462
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x629/0xba0 fs/read_write.c:688
 ksys_pwrite64 fs/read_write.c:795 [inline]
 __do_sys_pwrite64 fs/read_write.c:803 [inline]
 __se_sys_pwrite64 fs/read_write.c:800 [inline]
 __x64_sys_pwrite64+0x19c/0x230 fs/read_write.c:800
 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: 0033:0x7f66fc92c799
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:00007f66fab86028 EFLAGS: 00000246 ORIG_RAX: 0000000000000012
RAX: ffffffffffffffda RBX: 00007f66fcba5fa0 RCX: 00007f66fc92c799
RDX: 000000000000fdef RSI: 0000200000000140 RDI: 0000000000000008
RBP: 00007f66fc9c2c99 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000fecc R11: 0000000000000246 R12: 0000000000000000
R13: 00007f66fcba6038 R14: 00007f66fcba5fa0 R15: 00007ffde209e1f8
 </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 2e 02 70 fe 48 c7 c7 20 dc 8a 8b 48 c7 c6 19 d8 8a 8b ba 96 02 00 00 48 c7 c1 40 dd 8a 8b e8 ff ff d2 fd 90 <0f> 0b e8 07 02 70 fe 48 c7 c7 00 de 8a 8b e8 eb ff d2 fd 48 c7 c7
RSP: 0018:ffffc90004926fe0 EFLAGS: 00010246
RAX: 000000000000002b RBX: 0000000000000000 RCX: 84c0189a7d484c00
RDX: ffffc9001d851000 RSI: 0000000000001ad2 RDI: 0000000000001ad3
RBP: ffffc90004927108 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52000924dad R12: 1ffff920006a9400
R13: ffffc9000354a000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f66fab866c0(0000) GS:ffff88812633c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb5d8ee7e20 CR3: 000000002486e000 CR4: 00000000003526f0