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authorXi Wang <xi.wang@gmail.com>2012-08-26 16:47:13 +0000
committerDavid S. Miller <davem@davemloft.net>2012-08-31 15:55:37 -0400
commitfc61b928dc4d72176cf4bd4d30bf1d22e599aefc (patch)
tree6ae17685b8c9657293670d38f4703a4c597a3523 /net/unix
parent46b66d7077b89fb4917ceef19b3f7dd86055c94a (diff)
af_unix: fix shutdown parameter checking
Return -EINVAL rather than 0 given an invalid "mode" parameter. Signed-off-by: Xi Wang <xi.wang@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/unix')
-rw-r--r--net/unix/af_unix.c12
1 files changed, 8 insertions, 4 deletions
diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index c5ee4ff61364..8a84ab64cafd 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -2060,10 +2060,14 @@ static int unix_shutdown(struct socket *sock, int mode)
struct sock *sk = sock->sk;
struct sock *other;
- mode = (mode+1)&(RCV_SHUTDOWN|SEND_SHUTDOWN);
-
- if (!mode)
- return 0;
+ if (mode < SHUT_RD || mode > SHUT_RDWR)
+ return -EINVAL;
+ /* This maps:
+ * SHUT_RD (0) -> RCV_SHUTDOWN (1)
+ * SHUT_WR (1) -> SEND_SHUTDOWN (2)
+ * SHUT_RDWR (2) -> SHUTDOWN_MASK (3)
+ */
+ ++mode;
unix_state_lock(sk);
sk->sk_shutdown |= mode;

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