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authorDavid S. Miller <davem@davemloft.net>2017-09-02 02:42:05 +0200
committerDavid S. Miller <davem@davemloft.net>2017-09-02 02:42:05 +0200
commit6026e043d09012c6269f9a96a808d52d9c498224 (patch)
treea80578915557db98596821ff60d2ff37dafffb4f /net/kcm
parentinetpeer: fix RCU lookup() (diff)
parentepoll: fix race between ep_poll_callback(POLLFREE) and ep_free()/ep_remove() (diff)
downloadlinux-6026e043d09012c6269f9a96a808d52d9c498224.tar.xz
linux-6026e043d09012c6269f9a96a808d52d9c498224.zip
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Three cases of simple overlapping changes. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/kcm')
-rw-r--r--net/kcm/kcmsock.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/net/kcm/kcmsock.c b/net/kcm/kcmsock.c
index 48e993b2dbcf..af4e76ac88ff 100644
--- a/net/kcm/kcmsock.c
+++ b/net/kcm/kcmsock.c
@@ -1387,6 +1387,10 @@ static int kcm_attach(struct socket *sock, struct socket *csock,
if (!csk)
return -EINVAL;
+ /* We must prevent loops or risk deadlock ! */
+ if (csk->sk_family == PF_KCM)
+ return -EOPNOTSUPP;
+
psock = kmem_cache_zalloc(kcm_psockp, GFP_KERNEL);
if (!psock)
return -ENOMEM;