kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN kobject: 'loop4' (000000006ae9d5a9): kobject_uevent_env CPU: 0 PID: 19924 Comm: syz-executor5 Not tainted 4.19.0+ #94 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:icmp_timeout_obj_to_nlattr+0x77/0x170 net/netfilter/nf_conntrack_proto_icmp.c:297 Code: b5 41 c7 00 f1 f1 f1 f1 c7 40 04 04 f2 f2 f2 65 48 8b 04 25 28 00 00 00 48 89 45 d0 31 c0 e8 30 79 24 fb 4c 89 e8 48 c1 e8 03 <42> 0f b6 14 38 4c 89 e8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 RSP: 0018:ffff880183487220 EFLAGS: 00010246 kobject: 'loop4' (000000006ae9d5a9): fill_kobj_path: path = '/devices/virtual/block/loop4' RAX: 0000000000000000 RBX: 1ffff10030690e45 RCX: ffffc9000c62d000 kobject: 'loop3' (0000000089513653): kobject_uevent_env RDX: 0000000000014291 RSI: ffffffff865affd0 RDI: ffff8801b1dc9d40 RBP: ffff8801834872b0 R08: ffff88018073e340 R09: ffff880182bc0268 R10: ffffed003057804c R11: ffff880182bc0260 R12: ffff8801b1dc9d40 kobject: 'loop3' (0000000089513653): fill_kobj_path: path = '/devices/virtual/block/loop3' R13: 0000000000000000 R14: ffff880183487288 R15: dffffc0000000000 FS: 00007f4c77338700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffe8ad79ad8 CR3: 00000001c644b000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: cttimeout_default_fill_info net/netfilter/nfnetlink_cttimeout.c:411 [inline] cttimeout_default_get+0x644/0x9e0 net/netfilter/nfnetlink_cttimeout.c:457 kobject: 'loop3' (0000000089513653): kobject_uevent_env kobject: 'loop3' (0000000089513653): fill_kobj_path: path = '/devices/virtual/block/loop3' nfnetlink_rcv_msg+0xdd3/0x10c0 net/netfilter/nfnetlink.c:228 netlink_rcv_skb+0x172/0x440 net/netlink/af_netlink.c:2477 kobject: 'loop3' (0000000089513653): kobject_uevent_env nfnetlink_rcv+0x1c0/0x4d0 net/netfilter/nfnetlink.c:560 kobject: 'loop3' (0000000089513653): fill_kobj_path: path = '/devices/virtual/block/loop3' netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline] netlink_unicast+0x5a5/0x760 net/netlink/af_netlink.c:1336 cgroup: fork rejected by pids controller in /syz3 netlink_sendmsg+0xa18/0xfc0 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:621 [inline] sock_sendmsg+0xd5/0x120 net/socket.c:631 ___sys_sendmsg+0x7fd/0x930 net/socket.c:2116 kobject: 'loop4' (000000006ae9d5a9): kobject_uevent_env kobject: 'loop4' (000000006ae9d5a9): fill_kobj_path: path = '/devices/virtual/block/loop4' __sys_sendmsg+0x11d/0x280 net/socket.c:2154 __do_sys_sendmsg net/socket.c:2163 [inline] __se_sys_sendmsg net/socket.c:2161 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2161 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457569 Code: fd b3 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 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f4c77337c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457569 RDX: 0000000000000000 RSI: 0000000020dddfc8 RDI: 0000000000000004 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f4c773386d4 R13: 00000000004c3b01 R14: 00000000004d5bf0 R15: 00000000ffffffff Modules linked in: kobject: 'event4' (0000000065d11d6d): kobject_cleanup, parent (null) kobject: 'event4' (0000000065d11d6d): calling ktype release kobject: 'event4': free name kobject: 'input3059' (00000000f2cf75fe): kobject_uevent_env kobject: 'input3059' (00000000f2cf75fe): fill_kobj_path: path = '/devices/virtual/input/input3059' kobject: 'input3059' (00000000f2cf75fe): kobject_cleanup, parent (null) kobject: 'input3059' (00000000f2cf75fe): calling ktype release kobject: 'input3059': free name ---[ end trace 5e6c897282bd87c4 ]--- kobject: 'event5' (00000000f7f51f99): kobject_uevent_env kobject: 'event5' (00000000f7f51f99): fill_kobj_path: path = '/devices/virtual/input/input3060/event5' RIP: 0010:icmp_timeout_obj_to_nlattr+0x77/0x170 net/netfilter/nf_conntrack_proto_icmp.c:297 netlink: 'syz-executor5': attribute type 3 has an invalid length. kobject: '(null)' (00000000efd0ba22): kobject_cleanup, parent 00000000f7f51f99 netlink: 'syz-executor5': attribute type 2 has an invalid length. Code: b5 41 c7 00 f1 f1 f1 f1 c7 40 04 04 f2 f2 f2 65 48 8b 04 25 28 00 00 00 48 89 45 d0 31 c0 e8 30 79 24 fb 4c 89 e8 48 c1 e8 03 <42> 0f b6 14 38 4c 89 e8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 kobject: '(null)' (00000000efd0ba22): calling ktype release RSP: 0018:ffff880183487220 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 1ffff10030690e45 RCX: ffffc9000c62d000 RDX: 0000000000014291 RSI: ffffffff865affd0 RDI: ffff8801b1dc9d40 RBP: ffff8801834872b0 R08: ffff88018073e340 R09: ffff880182bc0268 kobject: 'event5' (00000000f7f51f99): kobject_cleanup, parent (null) R10: ffffed003057804c R11: ffff880182bc0260 R12: ffff8801b1dc9d40 R13: 0000000000000000 R14: ffff880183487288 R15: dffffc0000000000 FS: 00007f4c77338700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 kobject: 'event5' (00000000f7f51f99): calling ktype release CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 kobject: 'event5': free name CR2: ffffffffff600400 CR3: 00000001c644b000 CR4: 00000000001426e0 kobject: 'input3060' (0000000047539ecb): kobject_uevent_env DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 kobject: 'input3060' (0000000047539ecb): fill_kobj_path: path = '/devices/virtual/input/input3060' DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 kobject: 'input3060' (0000000047539ecb): kobject_cleanup, parent (null)