This patch checks the function parameter 'bytes' before doing the
subtraction to prevent memory corruption.
Signed-off-by: Christian Gromm <christian.gromm@xxxxxxxxxxxxx>
Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
---
v2: change if condition to avoid difference of subtraction becomes negative.
drivers/staging/most/sound/sound.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/staging/most/sound/sound.c b/drivers/staging/most/sound/sound.c
index 3a1a590..45befb8 100644
--- a/drivers/staging/most/sound/sound.c
+++ b/drivers/staging/most/sound/sound.c
@@ -86,6 +86,8 @@ static void swap_copy24(u8 *dest, const u8 *source, unsigned int bytes)
{
unsigned int i = 0;
+ if (bytes < 2)
+ return;
while (i < bytes - 2) {
dest[i] = source[i + 2];
dest[i + 1] = source[i + 1];
--
2.7.4
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