loop3: detected capacity change from 0 to 32768
BUG at fs/jfs/jfs_dmap.c:3070 assert(n < 4)
------------[ cut here ]------------
kernel BUG at fs/jfs/jfs_dmap.c:3070!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 7975 Comm: syz.3.593 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:dbFindLeaf+0x51d/0x520
Code: e9 4c ff ff ff e8 63 b9 66 fe 48 c7 c7 a0 b8 0b 8c 48 c7 c6 e0 b5 0b 8c ba fe 0b 00 00 48 c7 c1 c0 c3 0b 8c e8 b4 a4 c8 fd 90 <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 41 57
RSP: 0018:ffffc900036cf5b8 EFLAGS: 00010246
RAX: 000000000000002b RBX: 0000000000000000 RCX: af3ee538f826fa00
RDX: ffffc90007279000 RSI: 0000000000001600 RDI: 0000000000001601
RBP: 0000000000000001 R08: ffffc900036cf347 R09: 1ffff920006d9e68
R10: dffffc0000000000 R11: fffff520006d9e69 R12: 0000000000000002
R13: 0000000000000058 R14: 0000000000000055 R15: 0000000000000155
FS:  00007f4b152ec6c0(0000) GS:ffff88818dc8d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbcf8058270 CR3: 0000000104fe6000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 dbAllocDmapLev+0x60/0x3c0
 dbAlloc+0x994/0xba0
 diNewExt+0x9b0/0x3150
 diAllocAG+0xeb1/0x1db0
 diAlloc+0x1d8/0x1680
 ialloc+0x8c/0x8f0
 jfs_mkdir+0x1e1/0xb00
 vfs_mkdir+0x413/0x630
 filename_mkdirat+0x285/0x510
 __se_sys_mkdir+0x34/0x150
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4b1439ce59
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:00007f4b152ec028 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007f4b14615fa0 RCX: 00007f4b1439ce59
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000180
RBP: 00007f4b14432d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4b14616038 R14: 00007f4b14615fa0 R15: 00007ffde7eb8508
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:dbFindLeaf+0x51d/0x520
Code: e9 4c ff ff ff e8 63 b9 66 fe 48 c7 c7 a0 b8 0b 8c 48 c7 c6 e0 b5 0b 8c ba fe 0b 00 00 48 c7 c1 c0 c3 0b 8c e8 b4 a4 c8 fd 90 <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 41 57
RSP: 0018:ffffc900036cf5b8 EFLAGS: 00010246
RAX: 000000000000002b RBX: 0000000000000000 RCX: af3ee538f826fa00
RDX: ffffc90007279000 RSI: 0000000000001600 RDI: 0000000000001601
RBP: 0000000000000001 R08: ffffc900036cf347 R09: 1ffff920006d9e68
R10: dffffc0000000000 R11: fffff520006d9e69 R12: 0000000000000002
R13: 0000000000000058 R14: 0000000000000055 R15: 0000000000000155
FS:  00007f4b152ec6c0(0000) GS:ffff88818dc8d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffb91f4068 CR3: 0000000104fe6000 CR4: 00000000000006f0
