general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 1 PID: 11568 Comm: syz-executor.4 Not tainted 5.7.0-rc7-next-20200526-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:skb_zcopy include/linux/skbuff.h:1446 [inline] RIP: 0010:skb_orphan_frags include/linux/skbuff.h:2777 [inline] RIP: 0010:skb_clone+0x9a/0x3c0 net/core/skbuff.c:1436 Code: c1 ea 03 80 3c 02 00 0f 85 06 03 00 00 4c 03 a5 c0 00 00 00 48 b8 00 00 00 00 00 fc ff df 49 8d 7c 24 03 48 89 fa 48 c1 ea 03 <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f 08 84 c0 0f 85 64 02 00 00 RSP: 0018:ffffc90000da88a0 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: ffff8880a2d7a440 RCX: 000000000000234e RDX: 0000000000000000 RSI: ffffffff86252493 RDI: 0000000000000003 RBP: ffffffff8a6524e0 R08: 0000000000000000 R09: ffff8880a2d7a440 R10: ffff8880ae738c5b R11: ffffed1015ce718b R12: 0000000000000000 R13: 0000000000000a20 R14: 0000000000000071 R15: ffffffff8a6524e0 FS: 00007f3ccf2ee700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2dd23000 CR3: 00000000a2ed1000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ip_icmp_error+0x31/0x5a0 net/ipv4/ip_sockglue.c:397 tcp_v4_err+0x99e/0x1ce0 net/ipv4/tcp_ipv4.c:576 icmp_socket_deliver+0x1e1/0x360 net/ipv4/icmp.c:803 icmp_unreach+0x33b/0xab0 net/ipv4/icmp.c:920 icmp_rcv+0xee6/0x15f0 net/ipv4/icmp.c:1102 ip_protocol_deliver_rcu+0x57/0x880 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x220/0x360 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:307 [inline] NF_HOOK include/linux/netfilter.h:301 [inline] ip_local_deliver+0x1c8/0x4e0 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:441 [inline] ip_rcv_finish+0x1da/0x2f0 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:307 [inline] NF_HOOK include/linux/netfilter.h:301 [inline] ip_rcv+0xd0/0x3c0 net/ipv4/ip_input.c:539 __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5268 __netif_receive_skb+0x27/0x1c0 net/core/dev.c:5382 process_backlog+0x21e/0x7a0 net/core/dev.c:6214 napi_poll net/core/dev.c:6659 [inline] net_rx_action+0x4e1/0x10d0 net/core/dev.c:6727 __do_softirq+0x268/0x9ee kernel/softirq.c:292 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1115 do_softirq.part.0+0x10f/0x160 kernel/softirq.c:337 do_softirq kernel/softirq.c:329 [inline] __local_bh_enable_ip+0x20e/0x270 kernel/softirq.c:189 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline] ip_finish_output2+0x8cf/0x22e0 net/ipv4/ip_output.c:229 __ip_finish_output net/ipv4/ip_output.c:306 [inline] __ip_finish_output+0x5f3/0xbc0 net/ipv4/ip_output.c:288 ip_finish_output+0x34/0x1f0 net/ipv4/ip_output.c:316 NF_HOOK_COND include/linux/netfilter.h:296 [inline] ip_output+0x1fe/0x610 net/ipv4/ip_output.c:430 dst_output include/net/dst.h:435 [inline] ip_local_out+0xaf/0x1a0 net/ipv4/ip_output.c:125 __ip_queue_xmit+0x84f/0x1c00 net/ipv4/ip_output.c:530 __tcp_transmit_skb+0x1a18/0x3760 net/ipv4/tcp_output.c:1238 tcp_transmit_skb net/ipv4/tcp_output.c:1254 [inline] tcp_send_syn_data net/ipv4/tcp_output.c:3631 [inline] tcp_connect+0x1d94/0x42b0 net/ipv4/tcp_output.c:3670 tcp_v4_connect+0x14f0/0x1c10 net/ipv4/tcp_ipv4.c:311 __inet_stream_connect+0x80f/0xe30 net/ipv4/af_inet.c:658 tcp_sendmsg_fastopen net/ipv4/tcp.c:1172 [inline] tcp_sendmsg_locked+0x23f8/0x3190 net/ipv4/tcp.c:1214 tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1441 inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:814 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:672 __sys_sendto+0x219/0x330 net/socket.c:1995 __do_sys_sendto net/socket.c:2007 [inline] __se_sys_sendto net/socket.c:2003 [inline] __x64_sys_sendto+0xdd/0x1b0 net/socket.c:2003 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:353 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45ca29 Code: 0d b7 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 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f3ccf2edc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00000000005011c0 RCX: 000000000045ca29 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 000000000078bf00 R08: 0000000020000240 R09: 0000000000000010 R10: 0000000020000800 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000a0e R14: 00000000004cce56 R15: 00007f3ccf2ee6d4 Modules linked in: ---[ end trace c774097592b785c6 ]--- RIP: 0010:skb_zcopy include/linux/skbuff.h:1446 [inline] RIP: 0010:skb_orphan_frags include/linux/skbuff.h:2777 [inline] RIP: 0010:skb_clone+0x9a/0x3c0 net/core/skbuff.c:1436 Code: c1 ea 03 80 3c 02 00 0f 85 06 03 00 00 4c 03 a5 c0 00 00 00 48 b8 00 00 00 00 00 fc ff df 49 8d 7c 24 03 48 89 fa 48 c1 ea 03 <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f 08 84 c0 0f 85 64 02 00 00 RSP: 0018:ffffc90000da88a0 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: ffff8880a2d7a440 RCX: 000000000000234e RDX: 0000000000000000 RSI: ffffffff86252493 RDI: 0000000000000003 RBP: ffffffff8a6524e0 R08: 0000000000000000 R09: ffff8880a2d7a440 R10: ffff8880ae738c5b R11: ffffed1015ce718b R12: 0000000000000000 R13: 0000000000000a20 R14: 0000000000000071 R15: ffffffff8a6524e0 FS: 00007f3ccf2ee700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2dd23000 CR3: 00000000a2ed1000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400