[PATCH 4.4 27/78] ALSA: firewire: fix a memory leak bug

[Greg Kroah-Hartman]

From: Wenwen Wang <wen...@cs.uga.edu>

commit 1be3c1fae6c1e1f5bb982b255d2034034454527a upstream.

In iso_packets_buffer_init(), 'b->packets' is allocated through
kmalloc_array(). Then, the aligned packet size is checked. If it is
larger than PAGE_SIZE, -EINVAL will be returned to indicate the error.
However, the allocated 'b->packets' is not deallocated on this path,
leading to a memory leak.

To fix the above issue, free 'b->packets' before returning the error code.

Fixes: 31ef9134eb52 ("ALSA: add LaCie FireWire Speakers/Griffin FireWave 
Surround driver")
Signed-off-by: Wenwen Wang <wen...@cs.uga.edu>
Reviewed-by: Takashi Sakamoto <o-taka...@sakamocchi.jp>
Cc: <sta...@vger.kernel.org> # v2.6.39+
Signed-off-by: Takashi Iwai <ti...@suse.de>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

---
 sound/firewire/packets-buffer.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/sound/firewire/packets-buffer.c
+++ b/sound/firewire/packets-buffer.c
@@ -37,7 +37,7 @@ int iso_packets_buffer_init(struct iso_p
        packets_per_page = PAGE_SIZE / packet_size;
        if (WARN_ON(!packets_per_page)) {
                err = -EINVAL;
-               goto error;
+               goto err_packets;
        }
        pages = DIV_ROUND_UP(count, packets_per_page);