| From | Greg Kroah-Hartman <> | Subject | [PATCH 3.10 31/64] ALSA: rawmidi: Remove kernel WARNING for NULL user-space buffer check | Date | Sun, 14 Feb 2016 14:23:03 -0800 |
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3.10-stable review patch. If anyone has any objections, please let me know.
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From: Takashi Iwai <tiwai@suse.de>
commit cc85f7a634cfaf9f0713c6aa06d08817424db37a upstream.
NULL user-space buffer can be passed even in a normal path, thus it's not good to spew a kernel warning with stack trace at each time. Just drop snd_BUG_ON() macro usage there.
BugLink: http://lkml.kernel.org/r/CACT4Y+YfVJ3L+q0i-4vyQVyyPD7V=OMX0PWPi29x9Bo3QaBLdw@mail.gmail.com Reported-by: Dmitry Vyukov <dvyukov@google.com> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- sound/core/rawmidi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/sound/core/rawmidi.c +++ b/sound/core/rawmidi.c @@ -1162,7 +1162,7 @@ static long snd_rawmidi_kernel_write1(st long count1, result; struct snd_rawmidi_runtime *runtime = substream->runtime; - if (snd_BUG_ON(!kernelbuf && !userbuf)) + if (!kernelbuf && !userbuf) return -EINVAL; if (snd_BUG_ON(!runtime->buffer)) return -EINVAL;
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