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| author |   Dan Rosenberg <drosenberg@vsecurity.com> | 2010-09-25 11:07:27 -0400 |
|---|---|---|
| committer |   Takashi Iwai <tiwai@suse.de> | 2010-09-25 17:46:22 +0200 |
| commit | e68d3b316ab7b02a074edc4f770e6a746390cb7d (patch) | |
| tree | 6dddc80b93622ba0bfe626ae1f0b0fddd9395072 /sound/pci/rme9652/hdspm.c | |
| parent | ALSA: oxygen: fix analog capture on Claro halo cards (diff) | |
| download | linux-dev-e68d3b316ab7b02a074edc4f770e6a746390cb7d.tar.xz linux-dev-e68d3b316ab7b02a074edc4f770e6a746390cb7d.zip | |
ALSA: sound/pci/rme9652: prevent reading uninitialized stack memory
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>
Cc: <stable@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to '')
| -rw-r--r-- | sound/pci/rme9652/hdspm.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/sound/pci/rme9652/hdspm.c b/sound/pci/rme9652/hdspm.c index 547b713d7204..0c98ef9156d8 100644 --- a/sound/pci/rme9652/hdspm.c +++ b/sound/pci/rme9652/hdspm.c @@ -4127,6 +4127,7 @@ static int snd_hdspm_hwdep_ioctl(struct snd_hwdep * hw, struct file *file, case SNDRV_HDSPM_IOCTL_GET_CONFIG_INFO: + memset(&info, 0, sizeof(info)); spin_lock_irq(&hdspm->lock); info.pref_sync_ref = hdspm_pref_sync_ref(hdspm); info.wordclock_sync_check = hdspm_wc_sync_check(hdspm); |