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Commit 0981a260 authored by Takashi Iwai's avatar Takashi Iwai Committed by Jaroslav Kysela
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[ALSA] Fix possible invalid memory access in PCM core 



snd_internval_list() may access invalid memory in the case count = 0
is given.  It shouldn't be passed, but it'd better to make the code
a bit more robust.

Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
Signed-off-by: default avatarJaroslav Kysela <perex@suse.cz>
parent bc7320c5

sound/core/pcm_lib.c

+5 −0
Original line number Diff line number Diff line
@@ -781,6 +781,11 @@ int snd_interval_list(struct snd_interval *i, unsigned int count, unsigned int * 
{

        unsigned int k;

	int changed = 0;



	if (!count) {

		i->empty = 1;

		return -EINVAL;

	}

        for (k = 0; k < count; k++) {

		if (mask && !(mask & (1 << k)))

			continue;