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Commit 4de930ef authored by Al Viro's avatar Al Viro Committed by David S. Miller
Browse files

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: default avatarAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 91edd096

net/socket.c

+4 −0
Original line number Diff line number Diff line
@@ -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;