diff options
| author | Takashi Iwai <tiwai@suse.de> | 2012-11-08 14:36:18 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-11-17 13:14:26 -0800 |
| commit | aaf238baf31e14cb1c111815193c3a78770b1873 (patch) | |
| tree | 36c89b47364c470c7cbafbade2220d5c68a4ccc2 /sound/core | |
| parent | 919609d3cba52431b16501a63e6a5d45266a25c6 (diff) | |
ALSA: Fix card refcount unbalance
commit 8bb4d9ce08b0a92ca174e41d92c180328f86173f upstream.
There are uncovered cases whether the card refcount introduced by the
commit a0830dbd isn't properly increased or decreased:
- OSS PCM and mixer success paths
- When lookup function gets NULL
This patch fixes these places.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=50251
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'sound/core')
| -rw-r--r-- | sound/core/oss/mixer_oss.c | 1 | ||||
| -rw-r--r-- | sound/core/oss/pcm_oss.c | 1 | ||||
| -rw-r--r-- | sound/core/pcm_native.c | 6 | ||||
| -rw-r--r-- | sound/core/sound.c | 2 | ||||
| -rw-r--r-- | sound/core/sound_oss.c | 2 |
5 files changed, 8 insertions, 4 deletions
diff --git a/sound/core/oss/mixer_oss.c b/sound/core/oss/mixer_oss.c index 5cdd0fe7109..e7c11838901 100644 --- a/sound/core/oss/mixer_oss.c +++ b/sound/core/oss/mixer_oss.c @@ -75,6 +75,7 @@ static int snd_mixer_oss_open(struct inode *inode, struct file *file) snd_card_unref(card); return -EFAULT; } + snd_card_unref(card); return 0; } diff --git a/sound/core/oss/pcm_oss.c b/sound/core/oss/pcm_oss.c index ea757241f47..725a1613598 100644 --- a/sound/core/oss/pcm_oss.c +++ b/sound/core/oss/pcm_oss.c @@ -2454,6 +2454,7 @@ static int snd_pcm_oss_open(struct inode *inode, struct file *file) mutex_unlock(&pcm->open_mutex); if (err < 0) goto __error; + snd_card_unref(pcm->card); return err; __error: diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c index c8e5a6b6c75..7393551a8c4 100644 --- a/sound/core/pcm_native.c +++ b/sound/core/pcm_native.c @@ -2110,7 +2110,8 @@ static int snd_pcm_playback_open(struct inode *inode, struct file *file) pcm = snd_lookup_minor_data(iminor(inode), SNDRV_DEVICE_TYPE_PCM_PLAYBACK); err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK); - snd_card_unref(pcm->card); + if (pcm) + snd_card_unref(pcm->card); return err; } @@ -2123,7 +2124,8 @@ static int snd_pcm_capture_open(struct inode *inode, struct file *file) pcm = snd_lookup_minor_data(iminor(inode), SNDRV_DEVICE_TYPE_PCM_CAPTURE); err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE); - snd_card_unref(pcm->card); + if (pcm) + snd_card_unref(pcm->card); return err; } diff --git a/sound/core/sound.c b/sound/core/sound.c index b235aaa3a1b..e9b79b53108 100644 --- a/sound/core/sound.c +++ b/sound/core/sound.c @@ -115,7 +115,7 @@ void *snd_lookup_minor_data(unsigned int minor, int type) mreg = snd_minors[minor]; if (mreg && mreg->type == type) { private_data = mreg->private_data; - if (mreg->card_ptr) + if (private_data && mreg->card_ptr) atomic_inc(&mreg->card_ptr->refcount); } else private_data = NULL; diff --git a/sound/core/sound_oss.c b/sound/core/sound_oss.c index cdeae29f43f..b6ff6d6349f 100644 --- a/sound/core/sound_oss.c +++ b/sound/core/sound_oss.c @@ -53,7 +53,7 @@ void *snd_lookup_oss_minor_data(unsigned int minor, int type) mreg = snd_oss_minors[minor]; if (mreg && mreg->type == type) { private_data = mreg->private_data; - if (mreg->card_ptr) + if (private_data && mreg->card_ptr) atomic_inc(&mreg->card_ptr->refcount); } else private_data = NULL; |