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authorClemens Ladisch <clemens@ladisch.de>2007-07-16 13:01:30 +0400
committerJaroslav Kysela <perex@suse.cz>2007-07-20 13:11:54 +0400
commit7c64ec343a7d7b2d73b19e6bb8d9fd15f0462890 (patch)
tree0066624778782a064a472e959132238c39a59e50 /sound/core/timer.c
parentc28054d4b31d78272f65c0d11db0796f50fb9569 (diff)
downloadlinux-7c64ec343a7d7b2d73b19e6bb8d9fd15f0462890.tar.xz
[ALSA] timer: check for incorrect device state in non-debug compiles, too
Convert the snd_assert()s to simple if()s to prevent crashes when one of the timer instance ioctls is called before the file is bound to a timer device. Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
Diffstat (limited to 'sound/core/timer.c')
-rw-r--r--sound/core/timer.c27
1 files changed, 18 insertions, 9 deletions
diff --git a/sound/core/timer.c b/sound/core/timer.c
index 67520b3c0042..f2bbacedd567 100644
--- a/sound/core/timer.c
+++ b/sound/core/timer.c
@@ -1549,9 +1549,11 @@ static int snd_timer_user_info(struct file *file,
int err = 0;
tu = file->private_data;
- snd_assert(tu->timeri != NULL, return -ENXIO);
+ if (!tu->timeri)
+ return -EBADFD;
t = tu->timeri->timer;
- snd_assert(t != NULL, return -ENXIO);
+ if (!t)
+ return -EBADFD;
info = kzalloc(sizeof(*info), GFP_KERNEL);
if (! info)
@@ -1579,9 +1581,11 @@ static int snd_timer_user_params(struct file *file,
int err;
tu = file->private_data;
- snd_assert(tu->timeri != NULL, return -ENXIO);
+ if (!tu->timeri)
+ return -EBADFD;
t = tu->timeri->timer;
- snd_assert(t != NULL, return -ENXIO);
+ if (!t)
+ return -EBADFD;
if (copy_from_user(&params, _params, sizeof(params)))
return -EFAULT;
if (!(t->hw.flags & SNDRV_TIMER_HW_SLAVE) && params.ticks < 1) {
@@ -1675,7 +1679,8 @@ static int snd_timer_user_status(struct file *file,
struct snd_timer_status status;
tu = file->private_data;
- snd_assert(tu->timeri != NULL, return -ENXIO);
+ if (!tu->timeri)
+ return -EBADFD;
memset(&status, 0, sizeof(status));
status.tstamp = tu->tstamp;
status.resolution = snd_timer_resolution(tu->timeri);
@@ -1695,7 +1700,8 @@ static int snd_timer_user_start(struct file *file)
struct snd_timer_user *tu;
tu = file->private_data;
- snd_assert(tu->timeri != NULL, return -ENXIO);
+ if (!tu->timeri)
+ return -EBADFD;
snd_timer_stop(tu->timeri);
tu->timeri->lost = 0;
tu->last_resolution = 0;
@@ -1708,7 +1714,8 @@ static int snd_timer_user_stop(struct file *file)
struct snd_timer_user *tu;
tu = file->private_data;
- snd_assert(tu->timeri != NULL, return -ENXIO);
+ if (!tu->timeri)
+ return -EBADFD;
return (err = snd_timer_stop(tu->timeri)) < 0 ? err : 0;
}
@@ -1718,7 +1725,8 @@ static int snd_timer_user_continue(struct file *file)
struct snd_timer_user *tu;
tu = file->private_data;
- snd_assert(tu->timeri != NULL, return -ENXIO);
+ if (!tu->timeri)
+ return -EBADFD;
tu->timeri->lost = 0;
return (err = snd_timer_continue(tu->timeri)) < 0 ? err : 0;
}
@@ -1729,7 +1737,8 @@ static int snd_timer_user_pause(struct file *file)
struct snd_timer_user *tu;
tu = file->private_data;
- snd_assert(tu->timeri != NULL, return -ENXIO);
+ if (!tu->timeri)
+ return -EBADFD;
return (err = snd_timer_pause(tu->timeri)) < 0 ? err : 0;
}