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 NOPTI
CPU: 0 UID: 0 PID: 5329 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:txLock+0x1b92/0x1cc0 fs/jfs/jfs_txnmgr.c:662
Code: e9 6a f8 ff ff e8 9e 2e 65 fe 48 c7 c7 a0 7f 0b 8c 48 c7 c6 99 7b 0b 8c ba 96 02 00 00 48 c7 c1 c0 80 0b 8c e8 0f 2c c7 fd 90 <0f> 0b e8 77 2e 65 fe 48 c7 c7 80 81 0b 8c e8 fb 2b c7 fd 48 c7 c7
RSP: 0018:ffffc9000de5efe0 EFLAGS: 00010246
RAX: 000000000000002b RBX: 0000000000000000 RCX: 66409ca85d7e3b00
RDX: ffffc90020001000 RSI: 000000000000e281 RDI: 000000000000e282
RBP: ffffc9000de5f108 R08: ffffc9000de5ed67 R09: 1ffff92001bcbdac
R10: dffffc0000000000 R11: fffff52001bcbdad R12: 1ffff92000210e00
R13: ffffc90001087000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f6cf8fde6c0(0000) GS:ffff88808ca4e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000000f000 CR3: 0000000044316000 CR4: 0000000000352ef0
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+0x2e2/0x8f0 mm/filemap.c:4319
 generic_file_write_iter+0x14a/0x680 mm/filemap.c:4462
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x61d/0xb90 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+0x199/0x230 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: 0033:0x7f6cf819c799
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:00007f6cf8fddfe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000012
RAX: ffffffffffffffda RBX: 00007f6cf8416090 RCX: 00007f6cf819c799
RDX: 000000000000fdef RSI: 0000200000000140 RDI: 000000000000000f
RBP: 00007f6cf8232c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000008080c61 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6cf8416128 R14: 00007f6cf8416090 R15: 00007ffc997dafd8
 </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 9e 2e 65 fe 48 c7 c7 a0 7f 0b 8c 48 c7 c6 99 7b 0b 8c ba 96 02 00 00 48 c7 c1 c0 80 0b 8c e8 0f 2c c7 fd 90 <0f> 0b e8 77 2e 65 fe 48 c7 c7 80 81 0b 8c e8 fb 2b c7 fd 48 c7 c7
RSP: 0018:ffffc9000de5efe0 EFLAGS: 00010246
RAX: 000000000000002b RBX: 0000000000000000 RCX: 66409ca85d7e3b00
RDX: ffffc90020001000 RSI: 000000000000e281 RDI: 000000000000e282
RBP: ffffc9000de5f108 R08: ffffc9000de5ed67 R09: 1ffff92001bcbdac
R10: dffffc0000000000 R11: fffff52001bcbdad R12: 1ffff92000210e00
R13: ffffc90001087000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f6cf8fde6c0(0000) GS:ffff88808ca4e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc997d9f40 CR3: 0000000044316000 CR4: 0000000000352ef0