blkno = 0, nblocks = 40
ERROR: (device loop4): dbFree: block to be freed is outside the map
BUG at fs/jfs/jfs_dmap.c:3036 assert(bitno < 32)
------------[ cut here ]------------
kernel BUG at fs/jfs/jfs_dmap.c:3036!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 6654 Comm: syz.4.107 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:dbFindBits+0x19e/0x1a0
Code: e8 fd 90 0f 0b e8 52 c4 80 fe 48 c7 c7 00 e3 c3 8b 48 c7 c6 40 e0 c3 8b ba dc 0b 00 00 48 c7 c1 e0 ea c3 8b e8 43 b6 e8 fd 90 <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 41 57 41
RSP: 0018:ffffc90003acf588 EFLAGS: 00010246
RAX: 0000000000000030 RBX: 0000000000000000 RCX: f960cef70df8bc00
RDX: ffffc900233c4000 RSI: 0000000000001758 RDI: 0000000000001759
RBP: 00000000ffffffff R08: ffffc90003acf2a7 R09: 1ffff92000759e54
R10: dffffc0000000000 R11: fffff52000759e55 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000020
FS:  00007f69285f76c0(0000) GS:ffff8881a3c13000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f691d5ff000 CR3: 0000000108d58000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 dbAllocDmapLev+0x16b/0x3c0
 dbAllocCtl+0x14a/0x9c0
 dbAllocAG+0x1e6/0xff0
 dbAlloc+0x5a8/0xba0
 dtInsert+0xad5/0x5f40
 jfs_symlink+0x715/0xe60
 vfs_symlink+0x143/0x2f0
 do_symlinkat+0x1b1/0x3f0
 __x64_sys_symlink+0x7a/0x90
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f692778ec29
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f69285f7038 EFLAGS: 00000246 ORIG_RAX: 0000000000000058
RAX: ffffffffffffffda RBX: 00007f69279d5fa0 RCX: 00007f692778ec29
RDX: 0000000000000000 RSI: 0000200000000c80 RDI: 0000200000001640
RBP: 00007f6927811e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f69279d6038 R14: 00007f69279d5fa0 R15: 00007fffc4ba1488
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:dbFindBits+0x19e/0x1a0
Code: e8 fd 90 0f 0b e8 52 c4 80 fe 48 c7 c7 00 e3 c3 8b 48 c7 c6 40 e0 c3 8b ba dc 0b 00 00 48 c7 c1 e0 ea c3 8b e8 43 b6 e8 fd 90 <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 41 57 41
RSP: 0018:ffffc90003acf588 EFLAGS: 00010246
RAX: 0000000000000030 RBX: 0000000000000000 RCX: f960cef70df8bc00
RDX: ffffc900233c4000 RSI: 0000000000001758 RDI: 0000000000001759
RBP: 00000000ffffffff R08: ffffc90003acf2a7 R09: 1ffff92000759e54
R10: dffffc0000000000 R11: fffff52000759e55 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000020
FS:  00007f69285f76c0(0000) GS:ffff8881a3c13000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f69285b5d58 CR3: 0000000108d58000 CR4: 00000000000006f0
