BUG at fs/jfs/jfs_txnmgr.c:663 assert(last)
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kernel BUG at fs/jfs/jfs_txnmgr.c:663!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5332 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+0x1bdb/0x1d10 fs/jfs/jfs_txnmgr.c:663
Code: e9 c5 f7 ff ff e8 05 16 5b fe 48 c7 c7 a0 a5 2c 8c 48 c7 c6 99 a1 2c 8c ba 97 02 00 00 48 c7 c1 c0 a6 2c 8c e8 76 c1 bb fd 90 <0f> 0b e8 de 15 5b fe 48 c7 c7 80 a7 2c 8c e8 62 c1 bb fd 48 c7 c7
RSP: 0018:ffffc9000e30f560 EFLAGS: 00010246
RAX: 000000000000002b RBX: 0000000000000000 RCX: e4ab4712f43fb800
RDX: ffffc9000f7f1000 RSI: 00000000000039ce RDI: 00000000000039cf
RBP: ffffc9000e30f6a0 R08: ffff88801fc24713 R09: 1ffff11003f848e2
R10: dffffc0000000000 R11: ffffed1003f848e3 R12: 0000000000000000
R13: ffffc9000103c000 R14: 0000000000000000 R15: 1ffff92000207800
FS:  00007f175bebb6c0(0000) GS:ffff88808c543000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f175beb8f20 CR3: 00000000136b5000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 dtSplitRoot+0x38d/0x1900 fs/jfs/jfs_dtree.c:1924
 dtSplitUp fs/jfs/jfs_dtree.c:990 [inline]
 dtInsert+0xedd/0x5cb0 fs/jfs/jfs_dtree.c:868
 jfs_mkdir+0x76b/0xb00 fs/jfs/namei.c:271
 vfs_mkdir+0x406/0x620 fs/namei.c:5276
 filename_mkdirat+0x285/0x510 fs/namei.c:5309
 __do_sys_mkdirat fs/namei.c:5330 [inline]
 __se_sys_mkdirat+0x35/0x150 fs/namei.c:5327
 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: 0033:0x7f175af9cd07
Code: 00 66 90 48 89 f2 b9 00 01 00 00 48 89 fe bf 9c ff ff ff e9 db f7 ff ff 66 2e 0f 1f 84 00 00 00 00 00 90 b8 02 01 00 00 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:00007f175bebae18 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f175bebaea0 RCX: 00007f175af9cd07
RDX: 00000000000001ff RSI: 0000200000000780 RDI: 00000000ffffff9c
RBP: 0000200000000100 R08: 0000200000000d40 R09: 0000000000000000
R10: 0000200000000100 R11: 0000000000000246 R12: 0000200000000780
R13: 00007f175bebae60 R14: 0000000000000000 R15: 0000000000000000
 </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 05 16 5b fe 48 c7 c7 a0 a5 2c 8c 48 c7 c6 99 a1 2c 8c ba 97 02 00 00 48 c7 c1 c0 a6 2c 8c e8 76 c1 bb fd 90 <0f> 0b e8 de 15 5b fe 48 c7 c7 80 a7 2c 8c e8 62 c1 bb fd 48 c7 c7
RSP: 0018:ffffc9000e30f560 EFLAGS: 00010246
RAX: 000000000000002b RBX: 0000000000000000 RCX: e4ab4712f43fb800
RDX: ffffc9000f7f1000 RSI: 00000000000039ce RDI: 00000000000039cf
RBP: ffffc9000e30f6a0 R08: ffff88801fc24713 R09: 1ffff11003f848e2
R10: dffffc0000000000 R11: ffffed1003f848e3 R12: 0000000000000000
R13: ffffc9000103c000 R14: 0000000000000000 R15: 1ffff92000207800
FS:  00007f175bebb6c0(0000) GS:ffff88808c543000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f175beb8f20 CR3: 00000000136b5000 CR4: 0000000000352ef0