1 files changed, 2 insertions, 0 deletions

diff --git a/net/compat.c b/net/compat.c
index d74d82155d78..377e560ab5c9 100644
--- a/net/compat.c
+++ b/net/compat.c
@@ -254,6 +254,8 @@ int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *dat
         if (copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr)))
                 return -EFAULT;
         cmlen = CMSG_COMPAT_SPACE(len);
+        if (kmsg->msg_controllen < cmlen)
+                cmlen = kmsg->msg_controllen;
         kmsg->msg_control += cmlen;
         kmsg->msg_controllen -= cmlen;
         return 0;