[PATCH 2/2] net: ax25: fix information leak to userland harder

Andy Whitcroft apw at canonical.com
Mon Jan 31 17:59:15 UTC 2011

From: Kees Cook <kees.cook at canonical.com>

Commit fe10ae53384e48c51996941b7720ee16995cbcb7 adds a memset() to clear
the structure being sent back to userspace, but accidentally used the
wrong size.

Reported-by: Brad Spengler <spender at grsecurity.net>
Signed-off-by: Kees Cook <kees.cook at canonical.com>
Cc: stable at kernel.org
Signed-off-by: David S. Miller <davem at davemloft.net>

BugLink: http://bugs.launchpad.net/bugs/710714
(cherry picked from commit 5b919f833d9d60588d026ad82d17f17e8872c7a9 upstream)
Signed-off-by: Andy Whitcroft <apw at canonical.com>
 net/ax25/af_ax25.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/net/ax25/af_ax25.c b/net/ax25/af_ax25.c
index 6e2371a..763fd0b 100644
--- a/net/ax25/af_ax25.c
+++ b/net/ax25/af_ax25.c
@@ -1392,7 +1392,7 @@ static int ax25_getname(struct socket *sock, struct sockaddr *uaddr,
 	ax25_cb *ax25;
 	int err = 0;
-	memset(fsa, 0, sizeof(fsa));
+	memset(fsa, 0, sizeof(*fsa));
 	ax25 = ax25_sk(sk);

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