netlink: 'syz-executor079': attribute type 2 has an invalid length.
kasan: CONFIG_KASAN_INLINE enabled
audit: type=1400 audit(1554926112.024:38): avc: denied { write } for pid=7800 comm="syz-executor079" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 7800 Comm: syz-executor079 Not tainted 4.19.34 #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:generic_timeout_obj_to_nlattr+0x77/0x120 net/netfilter/nf_conntrack_proto_generic.c:103
Code: b5 41 c7 00 f1 f1 f1 f1 c7 40 04 04 f3 f3 f3 65 48 8b 04 25 28 00 00 00 48 89 45 d0 31 c0 e8 50 32 d5 fb 4c 89 e0 48 c1 e8 03 <42> 0f b6 14 38 4c 89 e0 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 74
RSP: 0018:ffff88807dc473d8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 1ffff1100fb88e7b RCX: ffffffff8599425b
RDX: 0000000000000000 RSI: ffffffff859604f0 RDI: ffff88809ecff8c0
RBP: ffff88807dc47460 R08: ffff88807de64600 R09: ffff888093cb84a8
R10: ffffed1012797094 R11: ffff888093cb84a0 R12: 0000000000000000
R13: ffff88807dc47438 R14: ffff88809ecff8c0 R15: dffffc0000000000
FS: 00000000011fa880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020001380 CR3: 0000000099715000 CR4: 00000000001406e0
Call Trace:
cttimeout_default_fill_info net/netfilter/nfnetlink_cttimeout.c:424 [inline]
cttimeout_default_get+0x69a/0xa80 net/netfilter/nfnetlink_cttimeout.c:471
nfnetlink_rcv_msg+0xd12/0xfe0 net/netfilter/nfnetlink.c:228
netlink_rcv_skb+0x180/0x460 net/netlink/af_netlink.c:2454
nfnetlink_rcv+0x1c0/0x460 net/netfilter/nfnetlink.c:560
netlink_unicast_kernel net/netlink/af_netlink.c:1317 [inline]
netlink_unicast+0x53c/0x720 net/netlink/af_netlink.c:1343
netlink_sendmsg+0x8ae/0xd70 net/netlink/af_netlink.c:1908
sock_sendmsg_nosec net/socket.c:622 [inline]
sock_sendmsg+0xdd/0x130 net/socket.c:632
___sys_sendmsg+0x806/0x930 net/socket.c:2115
__sys_sendmsg+0x105/0x1d0 net/socket.c:2153
__do_sys_sendmsg net/socket.c:2162 [inline]
__se_sys_sendmsg net/socket.c:2160 [inline]
__x64_sys_sendmsg+0x78/0xb0 net/socket.c:2160
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4401e9
Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fff6a40a358 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401e9
RDX: 0000000000000000 RSI: 0000000020dddfc8 RDI: 0000000000000003
RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a70
R13: 0000000000401b00 R14: 0000000000000000 R15: 0000000000000000
Modules linked in:
---[ end trace 1b686891e25a8d10 ]---
RIP: 0010:generic_timeout_obj_to_nlattr+0x77/0x120 net/netfilter/nf_conntrack_proto_generic.c:103
Code: b5 41 c7 00 f1 f1 f1 f1 c7 40 04 04 f3 f3 f3 65 48 8b 04 25 28 00 00 00 48 89 45 d0 31 c0 e8 50 32 d5 fb 4c 89 e0 48 c1 e8 03 <42> 0f b6 14 38 4c 89 e0 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 74
RSP: 0018:ffff88807dc473d8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 1ffff1100fb88e7b RCX: ffffffff8599425b
RDX: 0000000000000000 RSI: ffffffff859604f0 RDI: ffff88809ecff8c0
RBP: ffff88807dc47460 R08: ffff88807de64600 R09: ffff888093cb84a8
R10: ffffed1012797094 R11: ffff888093cb84a0 R12: 0000000000000000
R13: ffff88807dc47438 R14: ffff88809ecff8c0 R15: dffffc0000000000
FS: 00000000011fa880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020001380 CR3: 0000000099715000 CR4: 00000000001406e0