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Message-Id: <1343379141-5516-1-git-send-email-liuhangbin@gmail.com> Date: Fri, 27 Jul 2012 16:52:21 +0800 From: Hangbin Liu <liuhangbin@...il.com> To: netdev@...r.kernel.org Cc: hkchu@...gle.com, Hangbin Liu <liuhangbin@...il.com> Subject: [PATCH] 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@...il.com> --- net/ipv4/tcp.c | 5 ++++- 1 files changed, 4 insertions(+), 1 deletions(-) diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index 581ecf0..e7e6eea 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -2681,7 +2681,10 @@ 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. */ - icsk->icsk_user_timeout = msecs_to_jiffies(val); + if (val < 0) + err = -EINVAL; + else + icsk->icsk_user_timeout = msecs_to_jiffies(val); break; default: err = -ENOPROTOOPT; -- 1.7.7.6 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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