audit: type=1326 audit(1645851602.247:613): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=153233 comm="syz-executor.1" exe="/syz-executor.1" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f354ffeab19 code=0x0
general protection fault, probably for non-canonical address 0xdffffc0000000004: 0000 [#1] PREEMPT SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000020-0x0000000000000027]
netlink: 'syz-executor.4': attribute type 29 has an invalid length.
CPU: 0 PID: 153239 Comm: syz-executor.3 Tainted: G    B             5.17.0-rc5-next-20220225 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
RIP: 0010:move_vma.constprop.0+0x9f4/0xf40
Code: 3c 02 00 0f 85 1d 05 00 00 48 8b 73 08 4c 89 e7 e8 31 5e fe ff 48 ba 00 00 00 00 00 fc ff df 48 8d 78 20 48 89 f9 48 c1 e9 03 <80> 3c 11 00 0f 85 e0 04 00 00 48 81 48 20 00 00 10 00 e9 fe fc ff
RSP: 0018:ffff88801ef97c98 EFLAGS: 00010212
RAX: 0000000000000000 RBX: ffff88800e2059c0 RCX: 0000000000000004
RDX: dffffc0000000000 RSI: ffffffff821199cd RDI: 0000000000000020
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff858cc397
R10: 0000000000000000 R11: 0000000000000001 R12: ffff888041997700
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000020ff8000
FS:  00007f7758780700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f775b31a000 CR3: 000000004e9aa000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 __do_sys_mremap+0x78f/0x14f0
 do_syscall_64+0x3b/0x90
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f775b20ab19
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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f7758780188 EFLAGS: 00000246 ORIG_RAX: 0000000000000019
RAX: ffffffffffffffda RBX: 00007f775b31df60 RCX: 00007f775b20ab19
RDX: 0000000000001000 RSI: 0000000000001000 RDI: 0000000020ffa000
RBP: 00007f775b264f6d R08: 0000000020ff8000 R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffce2bcd09f R14: 00007f7758780300 R15: 0000000000022000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:move_vma.constprop.0+0x9f4/0xf40
Code: 3c 02 00 0f 85 1d 05 00 00 48 8b 73 08 4c 89 e7 e8 31 5e fe ff 48 ba 00 00 00 00 00 fc ff df 48 8d 78 20 48 89 f9 48 c1 e9 03 <80> 3c 11 00 0f 85 e0 04 00 00 48 81 48 20 00 00 10 00 e9 fe fc ff
RSP: 0018:ffff88801ef97c98 EFLAGS: 00010212
RAX: 0000000000000000 RBX: ffff88800e2059c0 RCX: 0000000000000004
RDX: dffffc0000000000 RSI: ffffffff821199cd RDI: 0000000000000020
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff858cc397
R10: 0000000000000000 R11: 0000000000000001 R12: ffff888041997700
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000020ff8000
FS:  00007f7758780700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f775b31a000 CR3: 000000004e9aa000 CR4: 0000000000350ef0
netlink: 'syz-executor.4': attribute type 29 has an invalid length.
audit: type=1326 audit(1645851603.081:614): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=153233 comm="syz-executor.1" exe="/syz-executor.1" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f354ffeab19 code=0x0
----------------
Code disassembly (best guess):
   0:	3c 02                	cmp    $0x2,%al
   2:	00 0f                	add    %cl,(%rdi)
   4:	85 1d 05 00 00 48    	test   %ebx,0x48000005(%rip)        # 0x4800000f
   a:	8b 73 08             	mov    0x8(%rbx),%esi
   d:	4c 89 e7             	mov    %r12,%rdi
  10:	e8 31 5e fe ff       	callq  0xfffe5e46
  15:	48 ba 00 00 00 00 00 	movabs $0xdffffc0000000000,%rdx
  1c:	fc ff df
  1f:	48 8d 78 20          	lea    0x20(%rax),%rdi
  23:	48 89 f9             	mov    %rdi,%rcx
  26:	48 c1 e9 03          	shr    $0x3,%rcx
* 2a:	80 3c 11 00          	cmpb   $0x0,(%rcx,%rdx,1) <-- trapping instruction
  2e:	0f 85 e0 04 00 00    	jne    0x514
  34:	48 81 48 20 00 00 10 	orq    $0x100000,0x20(%rax)
  3b:	00
  3c:	e9                   	.byte 0xe9
  3d:	fe                   	(bad)
  3e:	fc                   	cld
  3f:	ff                   	.byte 0xff