From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934294Ab0J1UE6 (ORCPT ); Thu, 28 Oct 2010 16:04:58 -0400 Received: from mail-ey0-f174.google.com ([209.85.215.174]:49481 "EHLO mail-ey0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932325Ab0J1UEF (ORCPT ); Thu, 28 Oct 2010 16:04:05 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=from:to:cc:subject:date:message-id:x-mailer; b=BFsBfbxXBxaIsR0CGrdrzlodJJP6Gz3xjuJmTbPxAu34OGEpOsW6ZO14YeEqpavBTJ hVfdquMzAtf0/qqeheInOJr1+HnCHZKRY6d7PFd16UUAnqW3WZEGyNIUi6HzYpTrNq0B JDFM6Pc1+NVtPmy9nuA8V6KIs2CnMLgghfVWs= From: Vasiliy Kulikov To: kernel-janitors@vger.kernel.org Cc: Greg Kroah-Hartman , Tejun Heo , Arnd Bergmann , devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org Subject: [PATCH 3/8] staging: dream: fix information leak to userland Date: Fri, 29 Oct 2010 00:01:47 +0400 Message-Id: <1288296107-19068-1-git-send-email-segooon@gmail.com> X-Mailer: git-send-email 1.7.0.4 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Structure msm_audio_stats is copied to userland with some fields unitialized. It leads to leaking of contents of kernel stack memory. Also struct msm_audio_config has field "unused" of type array of 3 elements, not 4. Instead of this, initialize field "type". Signed-off-by: Vasiliy Kulikov --- drivers/staging/dream/qdsp5/audio_evrc.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-) diff --git a/drivers/staging/dream/qdsp5/audio_evrc.c b/drivers/staging/dream/qdsp5/audio_evrc.c index 24a8926..b1f9233 100644 --- a/drivers/staging/dream/qdsp5/audio_evrc.c +++ b/drivers/staging/dream/qdsp5/audio_evrc.c @@ -481,6 +481,7 @@ static long audevrc_ioctl(struct file *file, unsigned int cmd, if (cmd == AUDIO_GET_STATS) { struct msm_audio_stats stats; + memset(&stats, 0, sizeof(stats)); stats.byte_count = audpp_avsync_byte_count(audio->dec_id); stats.sample_count = audpp_avsync_sample_count(audio->dec_id); if (copy_to_user((void *)arg, &stats, sizeof(stats))) @@ -515,10 +516,10 @@ static long audevrc_ioctl(struct file *file, unsigned int cmd, config.buffer_count = 2; config.sample_rate = 8000; config.channel_count = 1; + config.type = 0; config.unused[0] = 0; config.unused[1] = 0; config.unused[2] = 0; - config.unused[3] = 0; if (copy_to_user((void *)arg, &config, sizeof(config))) rc = -EFAULT; else -- 1.7.0.4