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authorTakashi Iwai <tiwai@suse.de>2017-11-21 18:36:11 +0300
committerTakashi Iwai <tiwai@suse.de>2017-11-21 18:36:11 +0300
commit3d4e8303f2c747c8540a0a0126d0151514f6468b (patch)
tree4b6761206e11463c08ec2fe50e734f62fcd910fe /sound/core/timer_compat.c
parent20e3f985bb875fea4f86b04eba4b6cc29bfd6b71 (diff)
downloadlinux-3d4e8303f2c747c8540a0a0126d0151514f6468b.tar.xz
ALSA: timer: Remove kernel warning at compat ioctl error paths
Some timer compat ioctls have NULL checks of timer instance with snd_BUG_ON() that bring up WARN_ON() when the debug option is set. Actually the condition can be met in the normal situation and it's confusing and bad to spew kernel warnings with stack trace there. Let's remove snd_BUG_ON() invocation and replace with the simple checks. Also, correct the error code to EBADFD to follow the native ioctl error handling. Reported-by: syzbot <syzkaller@googlegroups.com> Cc: <stable@vger.kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core/timer_compat.c')
-rw-r--r--sound/core/timer_compat.c12
1 files changed, 6 insertions, 6 deletions
diff --git a/sound/core/timer_compat.c b/sound/core/timer_compat.c
index 59127b6ef39e..e00f7e399e46 100644
--- a/sound/core/timer_compat.c
+++ b/sound/core/timer_compat.c
@@ -66,11 +66,11 @@ static int snd_timer_user_info_compat(struct file *file,
struct snd_timer *t;
tu = file->private_data;
- if (snd_BUG_ON(!tu->timeri))
- return -ENXIO;
+ if (!tu->timeri)
+ return -EBADFD;
t = tu->timeri->timer;
- if (snd_BUG_ON(!t))
- return -ENXIO;
+ if (!t)
+ return -EBADFD;
memset(&info, 0, sizeof(info));
info.card = t->card ? t->card->number : -1;
if (t->hw.flags & SNDRV_TIMER_HW_SLAVE)
@@ -99,8 +99,8 @@ static int snd_timer_user_status_compat(struct file *file,
struct snd_timer_status32 status;
tu = file->private_data;
- if (snd_BUG_ON(!tu->timeri))
- return -ENXIO;
+ if (!tu->timeri)
+ return -EBADFD;
memset(&status, 0, sizeof(status));
status.tstamp.tv_sec = tu->tstamp.tv_sec;
status.tstamp.tv_nsec = tu->tstamp.tv_nsec;