kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 14314 Comm: syz-executor2 Not tainted 4.19.0-rc4-next-20180921+ #77
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:nla_get_be32 include/net/netlink.h:1106 [inline]
RIP: 0010:ctnetlink_alloc_filter+0xb9/0x200 net/netfilter/nf_conntrack_netlink.c:843
Code: 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 57 01 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 6c 24 40 49 8d 7d 04 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 06
RSP: 0018:ffff8801c3ef71a0 EFLAGS: 00010247
RAX: dffffc0000000000 RBX: ffff8801c12c2c00 RCX: ffffc9000a259000
RDX: 0000000000000000 RSI: ffffffff864e6f4d RDI: 0000000000000004
RBP: ffff8801c3ef71b8 R08: ffff8801d3668000 R09: ffffed003b5a5b57
R10: ffffed003b5a5b57 R11: ffff8801dad2dabb R12: ffff8801c3ef7500
R13: 0000000000000000 R14: ffff8801c534cd78 R15: ffff8801c534cd51
FS:  00007f190d436700(0000) GS:ffff8801dad00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000606ed8 CR3: 00000001bccc0000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ctnetlink_start+0x10b/0x1b0 net/netfilter/nf_conntrack_netlink.c:857
 __netlink_dump_start+0x43e/0x6f0 net/netlink/af_netlink.c:2312
 netlink_dump_start include/linux/netlink.h:213 [inline]
 ctnetlink_get_conntrack+0x777/0x9f0 net/netfilter/nf_conntrack_netlink.c:1320
 nfnetlink_rcv_msg+0xdd3/0x10c0 net/netfilter/nfnetlink.c:228
 netlink_rcv_skb+0x172/0x440 net/netlink/af_netlink.c:2447
 nfnetlink_rcv+0x1c0/0x4d0 net/netfilter/nfnetlink.c:560
kobject: 'loop4' (00000000c421cafa): kobject_uevent_env
kobject: 'loop4' (00000000c421cafa): fill_kobj_path: path = '/devices/virtual/block/loop4'
 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline]
 netlink_unicast+0x5a5/0x760 net/netlink/af_netlink.c:1336
 netlink_sendmsg+0xa18/0xfc0 net/netlink/af_netlink.c:1901
 sock_sendmsg_nosec net/socket.c:622 [inline]
 sock_sendmsg+0xd5/0x120 net/socket.c:632
 ___sys_sendmsg+0x7fd/0x930 net/socket.c:2117
 __sys_sendmsg+0x11d/0x280 net/socket.c:2155
 __do_sys_sendmsg net/socket.c:2164 [inline]
 __se_sys_sendmsg net/socket.c:2162 [inline]
 __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2162
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457679
Code: 1d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 eb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f190d435c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f190d4366d4 RCX: 0000000000457679
RDX: 0000000000000000 RSI: 0000000020d65000 RDI: 0000000000000003
RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004d5520 R14: 00000000004c38d2 R15: 0000000000000000
Modules linked in:
kobject: 'loop5' (000000000c947d2a): kobject_uevent_env
---[ end trace d31ce31d2f4d4341 ]---
kobject: 'loop5' (000000000c947d2a): fill_kobj_path: path = '/devices/virtual/block/loop5'
RIP: 0010:nla_get_be32 include/net/netlink.h:1106 [inline]
RIP: 0010:ctnetlink_alloc_filter+0xb9/0x200 net/netfilter/nf_conntrack_netlink.c:843
Code: 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 57 01 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 6c 24 40 49 8d 7d 04 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 06
RSP: 0018:ffff8801c3ef71a0 EFLAGS: 00010247
RAX: dffffc0000000000 RBX: ffff8801c12c2c00 RCX: ffffc9000a259000
RDX: 0000000000000000 RSI: ffffffff864e6f4d RDI: 0000000000000004
RBP: ffff8801c3ef71b8 R08: ffff8801d3668000 R09: ffffed003b5a5b57
R10: ffffed003b5a5b57 R11: ffff8801dad2dabb R12: ffff8801c3ef7500
kobject: 'loop0' (00000000ae95d635): kobject_uevent_env
kobject: 'loop0' (00000000ae95d635): fill_kobj_path: path = '/devices/virtual/block/loop0'
R13: 0000000000000000 R14: ffff8801c534cd78 R15: ffff8801c534cd51
FS:  00007f190d436700(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000
kobject: 'loop3' (0000000095e8b12f): kobject_uevent_env
netlink: 16 bytes leftover after parsing attributes in process `syz-executor2'.
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
kobject: 'loop3' (0000000095e8b12f): fill_kobj_path: path = '/devices/virtual/block/loop3'
CR2: 00007fb0ec678000 CR3: 00000001bccc0000 CR4: 00000000001406f0
kobject: 'loop5' (000000000c947d2a): kobject_uevent_env
kobject: 'loop5' (000000000c947d2a): fill_kobj_path: path = '/devices/virtual/block/loop5'
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
kobject: 'loop4' (00000000c421cafa): kobject_uevent_env
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
kobject: 'loop4' (00000000c421cafa): fill_kobj_path: path = '/devices/virtual/block/loop4'