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authorAl Viro <viro@ZenIV.linux.org.uk>2015-03-20 17:41:43 +0000
committerDavid S. Miller <davem@davemloft.net>2015-03-20 16:38:06 -0400
commit4de930efc23b92ddf88ce91c405ee645fe6e27ea (patch)
treea5e02f72e51fca0aefd06600409bd42bc49392fb
parent91edd096e224941131f896b86838b1e59553696a (diff)
net: validate the range we feed to iov_iter_init() in sys_sendto/sys_recvfrom
Cc: stable@vger.kernel.org # v3.19 Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/socket.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/net/socket.c b/net/socket.c
index bbedbfc..245330c 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -1702,6 +1702,8 @@ SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len,
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;
@@ -1760,6 +1762,8 @@ SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size,
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;