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authorEric W. Biederman <ebiederm@xmission.com>2010-02-28 02:20:36 +0100
committerDavid S. Miller <davem@davemloft.net>2010-03-01 03:22:02 +0100
commit76dadd76c265a0cdb5a76aa4eef03fcc9639b388 (patch)
tree78ed0e6da0aa99d4c04c02d9003aadbc44f091d8 /net
parentvhost-net: restart tx poll on sk_sndbuf full (diff)
downloadlinux-76dadd76c265a0cdb5a76aa4eef03fcc9639b388.tar.xz
linux-76dadd76c265a0cdb5a76aa4eef03fcc9639b388.zip
scm: Only support SCM_RIGHTS on unix domain sockets.
We use scm_send and scm_recv on both unix domain and netlink sockets, but only unix domain sockets support everything required for file descriptor passing, so error if someone attempts to pass file descriptors over netlink sockets. Cc: stable@kernel.org Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/core/scm.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/net/core/scm.c b/net/core/scm.c
index b7ba91b074b3..9b264634acfd 100644
--- a/net/core/scm.c
+++ b/net/core/scm.c
@@ -156,6 +156,8 @@ int __scm_send(struct socket *sock, struct msghdr *msg, struct scm_cookie *p)
switch (cmsg->cmsg_type)
{
case SCM_RIGHTS:
+ if (!sock->ops || sock->ops->family != PF_UNIX)
+ goto error;
err=scm_fp_copy(cmsg, &p->fp);
if (err<0)
goto error;