ALSA: pcm: use krealloc_array()

Use the helper that checks for overflows internally instead of manually
calculating the size of the new array.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Bartosz Golaszewski <[email protected]>
Reviewed-by: Takashi Iwai <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Andy Shevchenko <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Christian Knig <[email protected]>
Cc: Christoph Lameter <[email protected]>
Cc: Daniel Vetter <[email protected]>
Cc: Daniel Vetter <[email protected]>
Cc: David Airlie <[email protected]>
Cc: David Rientjes <[email protected]>
Cc: Gustavo Padovan <[email protected]>
Cc: James Morse <[email protected]>
Cc: Jaroslav Kysela <[email protected]>
Cc: Jason Wang <[email protected]>
Cc: Joonsoo Kim <[email protected]>
Cc: Linus Walleij <[email protected]>
Cc: Maarten Lankhorst <[email protected]>
Cc: Mauro Carvalho Chehab <[email protected]>
Cc: Maxime Ripard <[email protected]>
Cc: "Michael S . Tsirkin" <[email protected]>
Cc: Pekka Enberg <[email protected]>
Cc: Robert Richter <[email protected]>
Cc: Sumit Semwal <[email protected]>
Cc: Takashi Iwai <[email protected]>
Cc: Thomas Zimmermann <[email protected]>
Cc: Tony Luck <[email protected]>
Cc: Vlastimil Babka <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

sound/core/pcm_lib.c

@@ -1129,8 +1129,8 @@ int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, unsigned int cond,
 	if (constrs->rules_num >= constrs->rules_all) {
 		struct snd_pcm_hw_rule *new;
 		unsigned int new_rules = constrs->rules_all + 16;
-		new = krealloc(constrs->rules, new_rules * sizeof(*c),
-			       GFP_KERNEL);
+		new = krealloc_array(constrs->rules, new_rules,
+				     sizeof(*c), GFP_KERNEL);
 		if (!new) {
 			va_end(args);
 			return -ENOMEM;