netlink: 20 bytes leftover after parsing attributes in process `syz-executor.4'.
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 2335 Comm: syz-executor.4 Not tainted 5.4.190-syzkaller-00044-g77dc925ddffb #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:flush_gro_hash net/core/dev.c:6313 [inline]
RIP: 0010:netif_napi_del+0x28f/0x7a0 net/core/dev.c:6328
Code: 00 74 08 4c 89 ff e8 d0 39 32 fe 49 8b 2f 49 39 ef 75 10 e8 03 cd 05 fe eb 35 90 e8 fb cc 05 fe 48 89 dd 48 89 e8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 ef e8 a2 39 32 fe 48 8b 5d 00 48 89 ef
RSP: 0018:ffff8881be8d7790 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 1ffff110382a27ff RCX: ffff8881ee7c8000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff835a6b83 R09: ffffed10382a27e3
R10: ffffed10382a27e3 R11: 1ffff110382a27e2 R12: ffff8881c1513f00
R13: dffffc0000000000 R14: ffff8881c1513f00 R15: ffff8881c1513f38
FS:  00007fb62b514700(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002001f000 CR3: 00000001ab1f8000 CR4: 00000000003426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 free_netdev+0x188/0x310 net/core/dev.c:9697
 netdev_run_todo+0xa79/0xc80 net/core/dev.c:9447
 rtnl_unlock net/core/rtnetlink.c:112 [inline]
 rtnetlink_rcv_msg+0xa49/0xb90 net/core/rtnetlink.c:5263
 netlink_rcv_skb+0x190/0x3a0 net/netlink/af_netlink.c:2500
 netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline]
 netlink_unicast+0x771/0x8d0 net/netlink/af_netlink.c:1338
 netlink_sendmsg+0x913/0xb90 net/netlink/af_netlink.c:1933
 sock_sendmsg_nosec net/socket.c:638 [inline]
 sock_sendmsg net/socket.c:658 [inline]
 ____sys_sendmsg+0x4ee/0x7c0 net/socket.c:2287
 ___sys_sendmsg net/socket.c:2341 [inline]
 __sys_sendmsg+0x235/0x2f0 net/socket.c:2387
 do_syscall_64+0xcb/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7fb62c39e109
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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb62b514168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fb62c4b0f60 RCX: 00007fb62c39e109
RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000004
RBP: 00007fb62c3f805d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffdc22e8df R14: 00007fb62b514300 R15: 0000000000022000
Modules linked in:
---[ end trace 3ede9f52935f9acc ]---
RIP: 0010:flush_gro_hash net/core/dev.c:6313 [inline]
RIP: 0010:netif_napi_del+0x28f/0x7a0 net/core/dev.c:6328
Code: 00 74 08 4c 89 ff e8 d0 39 32 fe 49 8b 2f 49 39 ef 75 10 e8 03 cd 05 fe eb 35 90 e8 fb cc 05 fe 48 89 dd 48 89 e8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 ef e8 a2 39 32 fe 48 8b 5d 00 48 89 ef
RSP: 0018:ffff8881be8d7790 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 1ffff110382a27ff RCX: ffff8881ee7c8000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff835a6b83 R09: ffffed10382a27e3
R10: ffffed10382a27e3 R11: 1ffff110382a27e2 R12: ffff8881c1513f00
R13: dffffc0000000000 R14: ffff8881c1513f00 R15: ffff8881c1513f38
FS:  00007fb62b514700(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002008d000 CR3: 00000001ab1f8000 CR4: 00000000003426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	00 74 08 4c          	add    %dh,0x4c(%rax,%rcx,1)
   4:	89 ff                	mov    %edi,%edi
   6:	e8 d0 39 32 fe       	callq  0xfe3239db
   b:	49 8b 2f             	mov    (%r15),%rbp
   e:	49 39 ef             	cmp    %rbp,%r15
  11:	75 10                	jne    0x23
  13:	e8 03 cd 05 fe       	callq  0xfe05cd1b
  18:	eb 35                	jmp    0x4f
  1a:	90                   	nop
  1b:	e8 fb cc 05 fe       	callq  0xfe05cd1b
  20:	48 89 dd             	mov    %rbx,%rbp
  23:	48 89 e8             	mov    %rbp,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	48 89 ef             	mov    %rbp,%rdi
  34:	e8 a2 39 32 fe       	callq  0xfe3239db
  39:	48 8b 5d 00          	mov    0x0(%rbp),%rbx
  3d:	48 89 ef             	mov    %rbp,%rdi