Commit 42493570 authored Jul 26, 2012 by Hangbin Liu Committed by David S. Miller Jul 27, 2012

tcp: Add TCP_USER_TIMEOUT negative value check



TCP_USER_TIMEOUT is a TCP level socket option that takes an unsigned int. But
patch "tcp: Add TCP_USER_TIMEOUT socket option"(dca43c75) didn't check the negative
values. If a user assign -1 to it, the socket will set successfully and wait
for 4294967295 miliseconds. This patch add a negative value check to avoid
this issue.

Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent b387e41e

net/ipv4/tcp.c

+4 −1

Original line number	Diff line number	Diff line
		@@ -2681,6 +2681,9 @@ static int do_tcp_setsockopt(struct sock *sk, int level,
		/* Cap the max timeout in ms TCP will retry/retrans
		* before giving up and aborting (ETIMEDOUT) a connection.
		*/
		if (val < 0)
		err = -EINVAL;
		else
		icsk->icsk_user_timeout = msecs_to_jiffies(val);
		break;
		default: