From 7a28826ac73d31a379d93785d8fbd24ab492b0bd Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Fri, 27 Aug 2010 22:02:15 +0200 Subject: [PATCH] ALSA: pcm: add more format names There were some new formats added in commit 15c0cee6c809 "ALSA: pcm: Define G723 3-bit and 5-bit formats". That commit increased SNDRV_PCM_FORMAT_LAST as well. My concern is that there are a couple places which do: for (i = 0; i < SNDRV_PCM_FORMAT_LAST; i++) { if (dummy->pcm_hw.formats & (1ULL << i)) snd_iprintf(buffer, " %s", snd_pcm_format_name(i)); } I haven't tested these but it looks like if "i" were equal to SNDRV_PCM_FORMAT_G723_24 or higher then we might read past the end of the array. Signed-off-by: Dan Carpenter Signed-off-by: Takashi Iwai --- sound/core/pcm.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/sound/core/pcm.c b/sound/core/pcm.c index cbe815d..204af48 100644 --- a/sound/core/pcm.c +++ b/sound/core/pcm.c @@ -203,10 +203,16 @@ static char *snd_pcm_format_names[] = { FORMAT(S18_3BE), FORMAT(U18_3LE), FORMAT(U18_3BE), + FORMAT(G723_24), + FORMAT(G723_24_1B), + FORMAT(G723_40), + FORMAT(G723_40_1B), }; const char *snd_pcm_format_name(snd_pcm_format_t format) { + if (format >= ARRAY_SIZE(snd_pcm_format_names)) + return "Unknown"; return snd_pcm_format_names[format]; } EXPORT_SYMBOL_GPL(snd_pcm_format_name); -- 2.7.4