From: Christian Gromm <christian.gr...@microchip.com> [ Upstream commit 45b754ae5b82949dca2b6e74fa680313cefdc813 ]
This patch checks the function parameter 'bytes' before doing the subtraction to prevent memory corruption. Signed-off-by: Christian Gromm <christian.gr...@microchip.com> Reported-by: Dan Carpenter <dan.carpen...@oracle.com> Link: https://lore.kernel.org/r/1612282865-21846-1-git-send-email-christian.gr...@microchip.com Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org> Signed-off-by: Sasha Levin <sas...@kernel.org> --- 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 89b02fc305b8b..fd9245d7eeb9a 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]; -- 2.27.0
