From: Dan Rosenberg <drosenberg@vsecurity.com>
Date: Sat, 25 Sep 2010 15:07:27 +0000 (-0400)
Subject: ALSA: sound/pci/rme9652: prevent reading uninitialized stack memory
X-Git-Tag: v2.6.27.55~15
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7b1178dc25f59d6f61dc87853d164e8ec87eba25;p=pandora-kernel.git

ALSA: sound/pci/rme9652: prevent reading uninitialized stack memory

commit e68d3b316ab7b02a074edc4f770e6a746390cb7d upstream.

The SNDRV_HDSP_IOCTL_GET_CONFIG_INFO and
SNDRV_HDSP_IOCTL_GET_CONFIG_INFO ioctls in hdspm.c and hdsp.c allow
unprivileged users to read uninitialized kernel stack memory, because
several fields of the hdsp{m}_config_info structs declared on the stack
are not altered or zeroed before being copied back to the user.  This
patch takes care of it.

Signed-off-by: Dan Rosenberg <dan.j.rosenberg@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

Reading git-diff-tree failed