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ALSA: hda - Fix and neaten print_nid_path/debug_badness

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print_nid_path has a possible buffer overflow if
struct nid_path.path values are > 256.

Avoid this and neaten the output to remove the leading ':'

Neaten debug_badness to always verify arguments.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Joe Perches 2014-07-05 13:02:02 -07:00 committed by Takashi Iwai
parent 2f6ba2b31b
commit d82353e534
1 changed files with 11 additions and 9 deletions
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20
sound/pci/hda/hda_generic.c
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@ -350,16 +350,16 @@ static void print_nid_path(struct hda_codec *codec,
const char *pfx, struct nid_path *path)
{
char buf[40];
char *pos = buf;
int i;
*pos = 0;
for (i = 0; i < path->depth; i++)
pos += scnprintf(pos, sizeof(buf) - (pos - buf), "%s%02x",
pos != buf ? ":" : "",
path->path[i]);
buf[0] = 0;
for (i = 0; i < path->depth; i++) {
char tmp[4];
sprintf(tmp, ":%02x", path->path[i]);
strlcat(buf, tmp, sizeof(buf));
}
codec_dbg(codec, "%s path: depth=%d %s\n", pfx, path->depth, buf);
codec_dbg(codec, "%s path: depth=%d '%s'\n", pfx, path->depth, buf);
}
/* called recursively */
@ -1700,9 +1700,11 @@ static int fill_and_eval_dacs(struct hda_codec *codec,
#define DEBUG_BADNESS
#ifdef DEBUG_BADNESS
#define debug_badness(fmt, args...) codec_dbg(codec, fmt, ##args)
#define debug_badness(fmt, ...) \
codec_dbg(codec, fmt, ##__VA_ARGS__)
#else
#define debug_badness(...)
#define debug_badness(fmt, ...) \
do { if (0) codec_dbg(codec, fmt, ##__VA_ARGS__); } while (0)
#endif
#ifdef DEBUG_BADNESS