diff options
| author | Hangbin Liu <liuhangbin@gmail.com> | 2012-07-26 22:52:21 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-07-27 13:45:50 -0700 |
| commit | 42493570100b91ef663c4c6f0c0fdab238f9d3c2 (patch) | |
| tree | a97aede6490c7eea90b83b1bf3bd26037e5485c9 /net | |
| parent | b387e41e523c1aa347cff055455d0dd129357df4 (diff) | |
| download | lwn-42493570100b91ef663c4c6f0c0fdab238f9d3c2.tar.gz lwn-42493570100b91ef663c4c6f0c0fdab238f9d3c2.zip | |
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>
Diffstat (limited to 'net')
| -rw-r--r-- | 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 581ecf02c6b5..e7e6eeae49c0 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; |