------------[ cut here ]------------ WARNING: CPU: 0 PID: 4690 at net/ipv4/tcp.c:1738 tcp_recvmsg+0x21e7/0x2de0 net/ipv4/tcp.c:1737() Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 4690 Comm: syz-executor183 Not tainted 4.4.163+ #12 0000000000000000 464c9176b5c24f26 ffff8800b15f76f0 ffffffff81aa556d ffffffff828354e0 ffff8800b1b65f00 ffffffff82a7c7c0 0000000000000009 00000000000006ca ffff8800b15f77b0 ffffffff813a1544 0000000041b58ab3 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x124 lib/dump_stack.c:51 [] panic+0x19e/0x359 kernel/panic.c:112 [] warn_slowpath_common.cold.6+0x20/0x20 kernel/panic.c:455 [] warn_slowpath_null+0x29/0x30 kernel/panic.c:492 [] tcp_recvmsg+0x21e7/0x2de0 net/ipv4/tcp.c:1737 [] inet_recvmsg+0x23e/0x4c0 net/ipv4/af_inet.c:786 [] sock_recvmsg_nosec net/socket.c:740 [inline] [] sock_recvmsg+0x91/0xc0 net/socket.c:748 [] ___sys_recvmsg+0x265/0x550 net/socket.c:2129 [] __sys_recvmsg+0xd6/0x190 net/socket.c:2175 [] C_SYSC_recvmsg net/compat.c:734 [inline] [] compat_SyS_recvmsg+0x2a/0x40 net/compat.c:732 [] do_syscall_32_irqs_on arch/x86/entry/common.c:396 [inline] [] do_fast_syscall_32+0x31e/0xa80 arch/x86/entry/common.c:463 [] sysenter_flags_fixed+0xd/0x1a Kernel Offset: disabled Rebooting in 86400 seconds..