linux-kernel - [34-longterm 126/209] net: Truncate recvfrom and sendto length to INT

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Date:	Thu, 14 Apr 2011 13:54:44 -0400
From:	Paul Gortmaker <paul.gortmaker@...driver.com>
To:	stable@...nel.org, linux-kernel@...r.kernel.org
Cc:	stable-review@...nel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	"David S. Miller" <davem@...emloft.net>,
	Paul Gortmaker <paul.gortmaker@...driver.com>
Subject: [34-longterm 126/209] net: Truncate recvfrom and sendto length to INT_MAX.

From: Linus Torvalds <torvalds@...ux-foundation.org>

  =====================================================================
  | This is a commit scheduled for the next v2.6.34 longterm release. |
  | If you see a problem with using this for longterm, please comment.|
  =====================================================================

commit 253eacc070b114c2ec1f81b067d2fed7305467b0 upstream.

Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Paul Gortmaker <paul.gortmaker@...driver.com>
---
 net/socket.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/net/socket.c b/net/socket.c
index 5e8d0af..c63ebf4 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -1672,6 +1672,8 @@ SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len,
 	struct iovec iov;
 	int fput_needed;
 
+	if (len > INT_MAX)
+		len = INT_MAX;
 	sock = sockfd_lookup_light(fd, &err, &fput_needed);
 	if (!sock)
 		goto out;
@@ -1729,6 +1731,8 @@ SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size,
 	int err, err2;
 	int fput_needed;
 
+	if (size > INT_MAX)
+		size = INT_MAX;
 	sock = sockfd_lookup_light(fd, &err, &fput_needed);
 	if (!sock)
 		goto out;
-- 
1.7.4.4

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