loop0: detected capacity change from 0 to 32768
UFO tlock:0xffffc9000104f1b0
UFO tlock:0xffffc9000104f3a8
UFO tlock:0xffffc9000104f240
syz.0.0 uses old SIOCAX25GETINFO
UFO tlock:0xffffc9000104f168
UFO tlock:0xffffc9000104f090
BUG at fs/jfs/jfs_dtree.c:1942 assert(dtlck->index == 0)
------------[ cut here ]------------
kernel BUG at fs/jfs/jfs_dtree.c:1942!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5313 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:dtSplitRoot+0x1694/0x16c0 fs/jfs/jfs_dtree.c:1942
Code: e9 49 f3 ff ff e8 ac 89 68 fe 48 c7 c7 e0 2d 0b 8c 48 c7 c6 c0 2c 0b 8c ba 96 07 00 00 48 c7 c1 80 2e 0b 8c e8 cd ab ca fd 90 <0f> 0b e8 85 89 68 fe 48 c7 c7 e0 2d 0b 8c 48 c7 c6 c0 2c 0b 8c ba
RSP: 0018:ffffc9000e1a7288 EFLAGS: 00010246
RAX: 0000000000000038 RBX: 0000000000001000 RCX: f46c0f5b637e6300
RDX: ffffc9000ebfa000 RSI: 0000000000002a3d RDI: 0000000000002a3e
RBP: ffffc9000104f49b R08: ffffc9000e1a7007 R09: 1ffff92001c34e00
R10: dffffc0000000000 R11: fffff52001c34e01 R12: dffffc0000000000
R13: 1ffff92000209e93 R14: 0000000000000002 R15: ffffc9000104f480
FS:  00007fe0204276c0(0000) GS:ffff88808ca67000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7d2b79b218 CR3: 00000000120b8000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 dtSplitUp fs/jfs/jfs_dtree.c:1244 [inline]
 dtInsert+0x246b/0x5f10 fs/jfs/jfs_dtree.c:871
 jfs_create+0x75b/0xb10 fs/jfs/namei.c:138
 lookup_open fs/namei.c:4483 [inline]
 open_last_lookups fs/namei.c:4583 [inline]
 path_openat+0x1395/0x3860 fs/namei.c:4827
 do_file_open+0x23e/0x4a0 fs/namei.c:4859
 do_sys_openat2+0x113/0x200 fs/open.c:1366
 do_sys_open fs/open.c:1372 [inline]
 __do_sys_creat fs/open.c:1450 [inline]
 __se_sys_creat fs/open.c:1444 [inline]
 __x64_sys_creat+0x8f/0xc0 fs/open.c:1444
 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: 0033:0x7fe01f59bf79
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:00007fe020427028 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 00007fe01f815fa0 RCX: 00007fe01f59bf79
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000580
RBP: 00007fe01f6327e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe01f816038 R14: 00007fe01f815fa0 R15: 00007ffd9478d458
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:dtSplitRoot+0x1694/0x16c0 fs/jfs/jfs_dtree.c:1942
Code: e9 49 f3 ff ff e8 ac 89 68 fe 48 c7 c7 e0 2d 0b 8c 48 c7 c6 c0 2c 0b 8c ba 96 07 00 00 48 c7 c1 80 2e 0b 8c e8 cd ab ca fd 90 <0f> 0b e8 85 89 68 fe 48 c7 c7 e0 2d 0b 8c 48 c7 c6 c0 2c 0b 8c ba
RSP: 0018:ffffc9000e1a7288 EFLAGS: 00010246
RAX: 0000000000000038 RBX: 0000000000001000 RCX: f46c0f5b637e6300
RDX: ffffc9000ebfa000 RSI: 0000000000002a3d RDI: 0000000000002a3e
RBP: ffffc9000104f49b R08: ffffc9000e1a7007 R09: 1ffff92001c34e00
R10: dffffc0000000000 R11: fffff52001c34e01 R12: dffffc0000000000
R13: 1ffff92000209e93 R14: 0000000000000002 R15: ffffc9000104f480
FS:  00007fe0204276c0(0000) GS:ffff88808ca67000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7d2b79b218 CR3: 00000000120b8000 CR4: 0000000000352ef0