WARNING: CPU: 1 PID: 7876 at include/net/sock.h:1569 sock_owned_by_me include/net/sock.h:1569 [inline]
WARNING: CPU: 1 PID: 7876 at include/net/sock.h:1569 tcp_snd_una_update net/ipv4/tcp_input.c:3349 [inline]
WARNING: CPU: 1 PID: 7876 at include/net/sock.h:1569 tcp_ack_update_window net/ipv4/tcp_input.c:3402 [inline]
WARNING: CPU: 1 PID: 7876 at include/net/sock.h:1569 tcp_ack+0x25f7/0x5930 net/ipv4/tcp_input.c:3657
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 7876 Comm: syz-executor.0 Not tainted 5.2.0-rc6-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+0x113/0x167 lib/dump_stack.c:113
 panic+0x212/0x4cb kernel/panic.c:219
 __warn.cold.8+0x1b/0x38 kernel/panic.c:576
 report_bug+0x1a4/0x200 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:179 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:272
 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:291
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:986
RIP: 0010:sock_owned_by_me include/net/sock.h:1569 [inline]
RIP: 0010:tcp_snd_una_update net/ipv4/tcp_input.c:3349 [inline]
RIP: 0010:tcp_ack_update_window net/ipv4/tcp_input.c:3402 [inline]
RIP: 0010:tcp_ack+0x25f7/0x5930 net/ipv4/tcp_input.c:3657
Code: c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 10 22 00 00 8b 05 55 c6 7f 03 85 c0 0f 84 49 e1 ff ff <0f> 0b e9 42 e1 ff ff 48 8d bb b8 06 00 00 48 b8 00 00 00 00 00 fc
RSP: 0018:ffff8880933debf8 EFLAGS: 00010202
RAX: 0000000000000001 RBX: ffff88808b1aab80 RCX: ffff888090906a80
RDX: 0000000000000000 RSI: ffff88808b1aac20 RDI: ffffffff8967ab74
RBP: ffff8880933deea8 R08: ffff88808b1aac90 R09: 0000000000000000
R10: 0000000000000000 R11: ffff88808b1ab4a4 R12: 0000000000000002
R13: 0000000000000068 R14: ffff8880a78b6bd2 R15: ffff8880933dee80
 tcp_rcv_established+0x803/0x2480 net/ipv4/tcp_input.c:5648
 tcp_v4_do_rcv+0x51d/0x780 net/ipv4/tcp_ipv4.c:1536
 sk_backlog_rcv include/net/sock.h:945 [inline]
 __release_sock+0x10b/0x330 net/core/sock.c:2414
 release_sock+0x4f/0x180 net/core/sock.c:2930
 gtp_encap_enable_socket+0x115/0x3b0 drivers/net/gtp.c:818
 gtp_encap_enable drivers/net/gtp.c:840 [inline]
 gtp_newlink+0x5ac/0x990 drivers/net/gtp.c:649
 __rtnl_newlink+0xcb3/0x13f0 net/core/rtnetlink.c:3187
 rtnl_newlink+0x61/0x90 net/core/rtnetlink.c:3245
 rtnetlink_rcv_msg+0x34f/0x8f0 net/core/rtnetlink.c:5214
 netlink_rcv_skb+0x13c/0x380 net/netlink/af_netlink.c:2482
 rtnetlink_rcv+0x10/0x20 net/core/rtnetlink.c:5232
 netlink_unicast_kernel net/netlink/af_netlink.c:1307 [inline]
 netlink_unicast+0x43b/0x640 net/netlink/af_netlink.c:1333
 netlink_sendmsg+0x765/0xc40 net/netlink/af_netlink.c:1922
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xb5/0xf0 net/socket.c:665
 ___sys_sendmsg+0x647/0x950 net/socket.c:2286
 __sys_sendmsg+0xd9/0x180 net/socket.c:2324
 __do_sys_sendmsg net/socket.c:2333 [inline]
 __se_sys_sendmsg net/socket.c:2331 [inline]
 __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2331
 do_syscall_64+0xd0/0x530 arch/x86/entry/common.c:301
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45af49
Code: ad b6 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 b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007efca6681c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045af49
RDX: 0000000020000000 RSI: 0000000020000180 RDI: 0000000000000003
RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007efca66826d4
R13: 00000000004ca9a0 R14: 00000000004e3d80 R15: 00000000ffffffff
Kernel Offset: disabled
Rebooting in 86400 seconds..