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Message-Id: <20160304153002.410734612@1wt.eu> Date: Fri, 04 Mar 2016 16:30:39 +0100 From: Willy Tarreau <w@....eu> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org Cc: Dmitry Vyukov <dvyukov@...gle.com>, Takashi Iwai <tiwai@...e.de>, Ben Hutchings <ben@...adent.org.uk>, Willy Tarreau <w@....eu> Subject: [PATCH 2.6.32 39/55] ALSA: rawmidi: Remove kernel WARNING for NULL user-space buffer check 2.6.32-longterm review patch. If anyone has any objections, please let me know. ------------------ From: Takashi Iwai <tiwai@...e.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@...gle.com> Signed-off-by: Takashi Iwai <tiwai@...e.de> Signed-off-by: Ben Hutchings <ben@...adent.org.uk> Signed-off-by: Willy Tarreau <w@....eu> --- sound/core/rawmidi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/sound/core/rawmidi.c b/sound/core/rawmidi.c index e4c12a1..07aed6b 100644 --- a/sound/core/rawmidi.c +++ b/sound/core/rawmidi.c @@ -1160,7 +1160,7 @@ static long snd_rawmidi_kernel_write1(struct snd_rawmidi_substream *substream, 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; -- 1.7.12.2.21.g234cd45.dirty
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