From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Paul Kot , Sven Eckelmann , Marek Lindner , Jiri Slaby Subject: [ 21/56] batman-adv: bat_socket_read missing checks Date: Tue, 2 Apr 2013 15:49:48 -0700 Message-Id: <20130402224714.344393922@linuxfoundation.org> In-Reply-To: <20130402224711.840825715@linuxfoundation.org> References: <20130402224711.840825715@linuxfoundation.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.0-stable review patch. If anyone has any objections, please let me know. ------------------ From: Paul Kot commit c00b6856fc642b234895cfabd15b289e76726430 upstream. Writing a icmp_packet_rr and then reading icmp_packet can lead to kernel memory corruption, if __user *buf is just below TASK_SIZE. Signed-off-by: Paul Kot [sven@narfation.org: made it checkpatch clean] Signed-off-by: Sven Eckelmann Signed-off-by: Marek Lindner Signed-off-by: Jiri Slaby Signed-off-by: Greg Kroah-Hartman --- net/batman-adv/icmp_socket.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/net/batman-adv/icmp_socket.c +++ b/net/batman-adv/icmp_socket.c @@ -136,8 +136,8 @@ static ssize_t bat_socket_read(struct fi spin_unlock_bh(&socket_client->lock); - error = __copy_to_user(buf, &socket_packet->icmp_packet, - socket_packet->icmp_len); + error = copy_to_user(buf, &socket_packet->icmp_packet, + socket_packet->icmp_len); packet_len = socket_packet->icmp_len; kfree(socket_packet);