Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=7c64ec343a7d7b2d73b19e6bb8d9fd15f0462890
Commit:     7c64ec343a7d7b2d73b19e6bb8d9fd15f0462890
Parent:     c28054d4b31d78272f65c0d11db0796f50fb9569
Author:     Clemens Ladisch <[EMAIL PROTECTED]>
AuthorDate: Mon Jul 16 11:01:30 2007 +0200
Committer:  Jaroslav Kysela <[EMAIL PROTECTED]>
CommitDate: Fri Jul 20 11:11:54 2007 +0200

    [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 <[EMAIL PROTECTED]>
    Signed-off-by: Jaroslav Kysela <[EMAIL PROTECTED]>
---
 sound/core/timer.c |   27 ++++++++++++++++++---------
 1 files changed, 18 insertions(+), 9 deletions(-)

diff --git a/sound/core/timer.c b/sound/core/timer.c
index 67520b3..f2bbace 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;
 }
 
-
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