------------[ cut here ]------------ WARNING: CPU: 0 PID: 9485 at include/net/sock.h:1578 sock_owned_by_me include/net/sock.h:1578 [inline] WARNING: CPU: 0 PID: 9485 at include/net/sock.h:1578 sock_owned_by_me include/net/sock.h:1575 [inline] WARNING: CPU: 0 PID: 9485 at include/net/sock.h:1578 tcp_snd_una_update net/ipv4/tcp_input.c:3355 [inline] WARNING: CPU: 0 PID: 9485 at include/net/sock.h:1578 tcp_ack_update_window net/ipv4/tcp_input.c:3408 [inline] WARNING: CPU: 0 PID: 9485 at include/net/sock.h:1578 tcp_ack+0x2f36/0x5a00 net/ipv4/tcp_input.c:3663 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 9485 Comm: syz-executor701 Not tainted 5.5.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x197/0x210 lib/dump_stack.c:118 panic+0x2e3/0x75c kernel/panic.c:221 __warn.cold+0x2f/0x3e kernel/panic.c:582 report_bug+0x289/0x300 lib/bug.c:195 fixup_bug arch/x86/kernel/traps.c:174 [inline] fixup_bug arch/x86/kernel/traps.c:169 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:267 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:286 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027 RIP: 0010:sock_owned_by_me include/net/sock.h:1578 [inline] RIP: 0010:sock_owned_by_me include/net/sock.h:1575 [inline] RIP: 0010:tcp_snd_una_update net/ipv4/tcp_input.c:3355 [inline] RIP: 0010:tcp_ack_update_window net/ipv4/tcp_input.c:3408 [inline] RIP: 0010:tcp_ack+0x2f36/0x5a00 net/ipv4/tcp_input.c:3663 Code: d0 7c 08 84 d2 0f 85 9c 22 00 00 44 8b 2d 76 ac df 03 31 ff 44 89 ee e8 e8 ce d8 fa 45 85 ed 0f 84 28 d9 ff ff e8 5a cd d8 fa <0f> 0b e9 1c d9 ff ff 48 c7 c3 ff ff ff ff 48 c7 85 70 fe ff ff ff RSP: 0018:ffffc90002056b70 EFLAGS: 00010293 RAX: ffff8880996f0080 RBX: 0000000000000068 RCX: ffffffff869c6448 RDX: 0000000000000000 RSI: ffffffff869c6456 RDI: 0000000000000005 RBP: ffffc90002056dd0 R08: ffff8880996f0080 R09: fffffbfff165f9a8 R10: fffffbfff165f9a7 R11: ffffffff8b2fcd3f R12: 0000000000000002 R13: 0000000000000001 R14: 0000000000002b80 R15: ffff888096760c40 tcp_rcv_established+0x6dd/0x1e90 net/ipv4/tcp_input.c:5698 tcp_v4_do_rcv+0x619/0x8d0 net/ipv4/tcp_ipv4.c:1619 sk_backlog_rcv include/net/sock.h:954 [inline] __release_sock+0x129/0x390 net/core/sock.c:2437 release_sock+0x59/0x1c0 net/core/sock.c:2953 gtp_encap_enable_socket+0x146/0x400 drivers/net/gtp.c:830 gtp_encap_enable drivers/net/gtp.c:852 [inline] gtp_newlink+0x9fc/0xc60 drivers/net/gtp.c:666 __rtnl_newlink+0x109d/0x1790 net/core/rtnetlink.c:3310 rtnl_newlink+0x69/0xa0 net/core/rtnetlink.c:3368 rtnetlink_rcv_msg+0x45e/0xaf0 net/core/rtnetlink.c:5429 netlink_rcv_skb+0x177/0x450 net/netlink/af_netlink.c:2477 rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:5447 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline] netlink_unicast+0x58c/0x7d0 net/netlink/af_netlink.c:1328 netlink_sendmsg+0x91c/0xea0 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:643 [inline] sock_sendmsg+0xd7/0x130 net/socket.c:663 ____sys_sendmsg+0x753/0x880 net/socket.c:2342 ___sys_sendmsg+0x100/0x170 net/socket.c:2396 __sys_sendmsg+0x105/0x1d0 net/socket.c:2429 __do_sys_sendmsg net/socket.c:2438 [inline] __se_sys_sendmsg net/socket.c:2436 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2436 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x448979 Code: e8 ac e7 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 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 4b 06 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ff8b5756d98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00000000006dec58 RCX: 0000000000448979 RDX: 0000000020000000 RSI: 0000000020000180 RDI: 0000000000000003 RBP: 00000000006dec50 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000008 R11: 0000000000000246 R12: 00000000006dec5c R13: d8de18c65af65c00 R14: 6078ba41124867b9 R15: 88651f7f928a260c Kernel Offset: disabled Rebooting in 86400 seconds..