UFO tlock:0xffffc900029022d0
BUG at fs/jfs/jfs_txnmgr.c:663 assert(last)
------------[ cut here ]------------
kernel BUG at fs/jfs/jfs_txnmgr.c:663!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 9271 Comm: syz.4.793 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
RIP: 0010:txLock+0x1bdb/0x1d10 fs/jfs/jfs_txnmgr.c:663
Code: e9 c5 f7 ff ff e8 25 32 5d fe 48 c7 c7 60 72 2c 8c 48 c7 c6 59 6e 2c 8c ba 97 02 00 00 48 c7 c1 80 73 2c 8c e8 a6 e8 bd fd 90 <0f> 0b e8 fe 31 5d fe 48 c7 c7 40 74 2c 8c e8 92 e8 bd fd 48 c7 c7
RSP: 0018:ffffc9001dc77200 EFLAGS: 00010246
RAX: 000000000000002b RBX: 0000000000000000 RCX: 70d7e08fe66e9500
RDX: ffffc90005d59000 RSI: 000000000000d7e0 RDI: 000000000000d7e1
RBP: ffffc9001dc77330 R08: ffffc9001dc76f87 R09: 1ffff92003b8edf0
R10: dffffc0000000000 R11: fffff52003b8edf1 R12: 0000000000000000
R13: ffffc90002902000 R14: 0000000000000000 R15: 1ffff92000520400
FS:  00007f467a4636c0(0000) GS:ffff888124f55000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000010000 CR3: 000000002906f000 CR4: 0000000000350ef0
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+0x2d5/0x8f0 mm/filemap.c:4364
 generic_file_write_iter+0xae/0x330 mm/filemap.c:4507
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x612/0xba0 fs/read_write.c:687
 ksys_write+0x150/0x270 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: 0033:0x7f467959e0d9
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:00007f467a463028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f4679825fa0 RCX: 00007f467959e0d9
RDX: 0000000000032600 RSI: 0000200000000100 RDI: 000000000000000d
RBP: 00007f4679635024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4679826038 R14: 00007f4679825fa0 R15: 00007ffc2345d7f8
 </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 25 32 5d fe 48 c7 c7 60 72 2c 8c 48 c7 c6 59 6e 2c 8c ba 97 02 00 00 48 c7 c1 80 73 2c 8c e8 a6 e8 bd fd 90 <0f> 0b e8 fe 31 5d fe 48 c7 c7 40 74 2c 8c e8 92 e8 bd fd 48 c7 c7
RSP: 0018:ffffc9001dc77200 EFLAGS: 00010246

RAX: 000000000000002b RBX: 0000000000000000 RCX: 70d7e08fe66e9500
RDX: ffffc90005d59000 RSI: 000000000000d7e0 RDI: 000000000000d7e1
RBP: ffffc9001dc77330 R08: ffffc9001dc76f87 R09: 1ffff92003b8edf0
R10: dffffc0000000000 R11: fffff52003b8edf1 R12: 0000000000000000
R13: ffffc90002902000 R14: 0000000000000000 R15: 1ffff92000520400
FS:  00007f467a4636c0(0000) GS:ffff888125055000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcdec3eb7c0 CR3: 000000002906f000 CR4: 0000000000350ef0