netlink: 1347 bytes leftover after parsing attributes in process `syz.0.691'.
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000083: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000418-0x000000000000041f]
CPU: 1 UID: 0 PID: 7767 Comm: syz.0.691 Not tainted 6.16.0-rc3-syzkaller-00044-g7595b66ae9de #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:ip_ignore_linkdown include/linux/inetdevice.h:270 [inline]
RIP: 0010:fib_lookup_good_nhc+0xaf/0x3f0 net/ipv4/fib_trie.c:1408
Code: df 48 c1 ea 03 80 3c 02 00 0f 85 1e 03 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 2b 48 8d bd 18 04 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 ef 02 00 00 4c 8b bd 18 04 00 00 e8 9b 7f 7c 01
RSP: 0018:ffffc9000330f388 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff888023edf820 RCX: ffffc9000c402000
RDX: 0000000000000083 RSI: ffffffff8a002179 RDI: 0000000000000418
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffffc9000330f520
R13: ffff888023edf837 R14: 0000000000000001 R15: ffff88806f610018
FS:  0000000000000000(0000) GS:ffff888097660000(0063) knlGS:00000000f5116b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 0000000080010000 CR3: 000000004be6b000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 nexthop_get_nhc_lookup include/net/nexthop.h:437 [inline]
 fib_table_lookup+0x158e/0x2300 net/ipv4/fib_trie.c:1584
 __inet_dev_addr_type+0x24e/0x830 net/ipv4/fib_frontend.c:225
 inet_addr_type_dev_table net/ipv4/fib_frontend.c:267 [inline]
 fib_del_ifaddr+0xe31/0x1510 net/ipv4/fib_frontend.c:1349
 fib_inetaddr_event+0xb9/0x270 net/ipv4/fib_frontend.c:1477
 notifier_call_chain+0xb9/0x410 kernel/notifier.c:85
 blocking_notifier_call_chain kernel/notifier.c:380 [inline]
 blocking_notifier_call_chain+0x69/0xa0 kernel/notifier.c:368
 __inet_del_ifa+0x3dc/0xf70 net/ipv4/devinet.c:451
 inet_rtm_deladdr+0x451/0x7c0 net/ipv4/devinet.c:698
 rtnetlink_rcv_msg+0x95b/0xe90 net/core/rtnetlink.c:6944
 netlink_rcv_skb+0x158/0x420 net/netlink/af_netlink.c:2534
 netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]
 netlink_unicast+0x53a/0x7f0 net/netlink/af_netlink.c:1339
 netlink_sendmsg+0x8d1/0xdd0 net/netlink/af_netlink.c:1883
 sock_sendmsg_nosec net/socket.c:712 [inline]
 __sock_sendmsg net/socket.c:727 [inline]
 __sys_sendto+0x4a0/0x520 net/socket.c:2180
 __do_sys_sendto net/socket.c:2187 [inline]
 __se_sys_sendto net/socket.c:2183 [inline]
 __ia32_sys_sendto+0xdd/0x1b0 net/socket.c:2183
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
 __do_fast_syscall_32+0x7c/0x3a0 arch/x86/entry/syscall_32.c:306
 do_fast_syscall_32+0x32/0x80 arch/x86/entry/syscall_32.c:331
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf7ff2579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f511655c EFLAGS: 00000296 ORIG_RAX: 0000000000000171
RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000080000000
RDX: 0000000000010a73 RSI: 0000000000000800 RDI: 0000000000000000
RBP: 000000005a5de35b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ip_ignore_linkdown include/linux/inetdevice.h:270 [inline]
RIP: 0010:fib_lookup_good_nhc+0xaf/0x3f0 net/ipv4/fib_trie.c:1408
Code: df 48 c1 ea 03 80 3c 02 00 0f 85 1e 03 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 2b 48 8d bd 18 04 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 ef 02 00 00 4c 8b bd 18 04 00 00 e8 9b 7f 7c 01
RSP: 0018:ffffc9000330f388 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff888023edf820 RCX: ffffc9000c402000
RDX: 0000000000000083 RSI: ffffffff8a002179 RDI: 0000000000000418
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffffc9000330f520
R13: ffff888023edf837 R14: 0000000000000001 R15: ffff88806f610018
FS:  0000000000000000(0000) GS:ffff888097560000(0063) knlGS:00000000f5116b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000002ef1dffc CR3: 000000004be6b000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	48 c1 ea 03          	shr    $0x3,%rdx
   4:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
   8:	0f 85 1e 03 00 00    	jne    0x32c
   e:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  15:	fc ff df
  18:	48 8b 2b             	mov    (%rbx),%rbp
  1b:	48 8d bd 18 04 00 00 	lea    0x418(%rbp),%rdi
  22:	48 89 fa             	mov    %rdi,%rdx
  25:	48 c1 ea 03          	shr    $0x3,%rdx
* 29:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2d:	0f 85 ef 02 00 00    	jne    0x322
  33:	4c 8b bd 18 04 00 00 	mov    0x418(%rbp),%r15
  3a:	e8 9b 7f 7c 01       	call   0x17c7fda