netlink: 'syz-executor.0': attribute type 2 has an invalid length.
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: 17531 Comm: syz-executor.0 Not tainted 4.19.34 #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:dccp_timeout_obj_to_nlattr+0x96/0x170 net/netfilter/nf_conntrack_proto_dccp.c:712
Code: f3 65 48 8b 14 25 28 00 00 00 48 89 55 d0 31 d2 48 89 85 70 ff ff ff e8 38 ff d3 fb 48 8b 8d 70 ff ff ff 48 89 d8 48 c1 e8 03 <0f> b6 14 08 48 89 d8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 a3
RSP: 0018:ffff88808bdef3c8 EFLAGS: 00010247
RAX: 0000000000000000 RBX: 0000000000000004 RCX: dffffc0000000000
RDX: 0000000000012acb RSI: ffffffff85973808 RDI: 1ffff110117bde7b
RBP: ffff88808bdef460 R08: ffff888095c145c0 R09: ffff88805d2e4768
R10: ffffed100ba5c8ec R11: ffff88805d2e4760 R12: ffffffff87e12aa0
R13: 0000000000000001 R14: ffff88809f6f81c0 R15: ffff88808bdef438
FS:  00007f5591efa700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000625208 CR3: 00000000771e2000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
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
kobject: 'loop4' (00000000ce18f5bf): kobject_uevent_env
kobject: 'loop4' (00000000ce18f5bf): fill_kobj_path: path = '/devices/virtual/block/loop4'
 sock_sendmsg_nosec net/socket.c:622 [inline]
 sock_sendmsg+0xdd/0x130 net/socket.c:632
 ___sys_sendmsg+0x806/0x930 net/socket.c:2115
kobject: 'loop5' (00000000791c80e4): kobject_uevent_env
 __sys_sendmsg+0x105/0x1d0 net/socket.c:2153
kobject: 'loop5' (00000000791c80e4): fill_kobj_path: path = '/devices/virtual/block/loop5'
 __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: 0033:0x458c29
Code: ad b8 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00
kobject: 'loop4' (00000000ce18f5bf): kobject_uevent_env
RSP: 002b:00007f5591ef9c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458c29
RDX: 0000000000000000 RSI: 0000000020dddfc8 RDI: 0000000000000003
RBP: 000000000073bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5591efa6d4
R13: 00000000004c632a R14: 00000000004da8e8 R15: 00000000ffffffff
Modules linked in:
kobject: 'loop4' (00000000ce18f5bf): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop2' (00000000199124ca): kobject_uevent_env
kobject: 'loop2' (00000000199124ca): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop3' (000000005de16da7): kobject_uevent_env
kobject: 'loop3' (000000005de16da7): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop1' (00000000edea769a): kobject_uevent_env
kobject: 'loop1' (00000000edea769a): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop2' (00000000199124ca): kobject_uevent_env
kobject: 'loop2' (00000000199124ca): fill_kobj_path: path = '/devices/virtual/block/loop2'
---[ end trace 75a2d675ff94e831 ]---
kobject: 'loop5' (00000000791c80e4): kobject_uevent_env
RIP: 0010:dccp_timeout_obj_to_nlattr+0x96/0x170 net/netfilter/nf_conntrack_proto_dccp.c:712
kobject: 'loop5' (00000000791c80e4): fill_kobj_path: path = '/devices/virtual/block/loop5'
Code: f3 65 48 8b 14 25 28 00 00 00 48 89 55 d0 31 d2 48 89 85 70 ff ff ff e8 38 ff d3 fb 48 8b 8d 70 ff ff ff 48 89 d8 48 c1 e8 03 <0f> b6 14 08 48 89 d8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 a3
kobject: 'loop4' (00000000ce18f5bf): kobject_uevent_env
kobject: 'loop4' (00000000ce18f5bf): fill_kobj_path: path = '/devices/virtual/block/loop4'
RSP: 0018:ffff88808bdef3c8 EFLAGS: 00010247
kobject: 'loop3' (000000005de16da7): kobject_uevent_env
kobject: 'loop3' (000000005de16da7): fill_kobj_path: path = '/devices/virtual/block/loop3'
RAX: 0000000000000000 RBX: 0000000000000004 RCX: dffffc0000000000
RDX: 0000000000012acb RSI: ffffffff85973808 RDI: 1ffff110117bde7b
RBP: ffff88808bdef460 R08: ffff888095c145c0 R09: ffff88805d2e4768
R10: ffffed100ba5c8ec R11: ffff88805d2e4760 R12: ffffffff87e12aa0
R13: 0000000000000001 R14: ffff88809f6f81c0 R15: ffff88808bdef438
kobject: 'loop1' (00000000edea769a): kobject_uevent_env
FS:  00007f5591efa700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
kobject: 'loop1' (00000000edea769a): fill_kobj_path: path = '/devices/virtual/block/loop1'
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
kobject: 'loop5' (00000000791c80e4): kobject_uevent_env
CR2: 000000000070c158 CR3: 00000000771e2000 CR4: 00000000001406e0
kobject: 'loop5' (00000000791c80e4): fill_kobj_path: path = '/devices/virtual/block/loop5'
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400