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[ALSA] Fix re-use of va_list 

The va_list is designed to be used only once.  The current code
may pass va_list arguments multiple times and may cause Oops.
Copy/release the arguments temporarily to avoid this problem.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
hifive-unleashed-5.1
Takashi Iwai 2006-10-18 19:09:46 +02:00 committed by Jaroslav Kysela
parent 5b15c95f88
commit dbedca39fe
1 changed files with 4 additions and 1 deletions
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5
sound/core/info.c
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@ -120,7 +120,10 @@ int snd_iprintf(struct snd_info_buffer *buffer, char *fmt,...)
len = buffer->len - buffer->size;
va_start(args, fmt);
for (;;) {
res = vsnprintf(buffer->buffer + buffer->curr, len, fmt, args);
va_list ap;
va_copy(ap, args);
res = vsnprintf(buffer->buffer + buffer->curr, len, fmt, ap);
va_end(ap);
if (res < len)
break;
err = resize_info_buffer(buffer, buffer->len + PAGE_SIZE);