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ALSA: firewire: fix a memory leak bug 

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: 31ef9134eb ("ALSA: add LaCie FireWire Speakers/Griffin FireWave Surround driver")
Signed-off-by: Wenwen Wang <wenwen@cs.uga.edu>
Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Cc: <stable@vger.kernel.org> # v2.6.39+
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Wenwen Wang 2019-08-08 00:50:58 -05:00 committed by Takashi Iwai
parent c7cd7c748a
commit 1be3c1fae6
1 changed files with 1 additions and 1 deletions
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2
sound/firewire/packets-buffer.c
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@ -37,7 +37,7 @@ int iso_packets_buffer_init(struct iso_packets_buffer *b, struct fw_unit *unit,
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);