3.19-stable review patch. If anyone has any objections, please let me know.
------------------
From: Al Viro <v...@zeniv.linux.org.uk>
commit 4de930efc23b92ddf88ce91c405ee645fe6e27ea upstream.
Signed-off-by: Al Viro <v...@zeniv.linux.org.uk>
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
net/socket.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/net/socket.c
+++ b/net/socket.c
@@ -1765,6 +1765,8 @@ SYSCALL_DEFINE6(sendto, int, fd, void __
if (len > INT_MAX)
len = INT_MAX;
+ if (unlikely(!access_ok(VERIFY_READ, buff, len)))
+ return -EFAULT;
sock = sockfd_lookup_light(fd, &err, &fput_needed);
if (!sock)
goto out;
@@ -1823,6 +1825,8 @@ SYSCALL_DEFINE6(recvfrom, int, fd, void
if (size > INT_MAX)
size = INT_MAX;
+ if (unlikely(!access_ok(VERIFY_WRITE, ubuf, size)))
+ return -EFAULT;
sock = sockfd_lookup_light(fd, &err, &fput_needed);
if (!sock)
goto out;
--
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