KASAN reported out of bounds access - cs_dsp_mock_bin_add_name_or_info(), because the source string length was rounded up to the allocation size.

Cc: Simon Trimmer simont@opensource.cirrus.com Cc: Charles Keepax ckeepax@opensource.cirrus.com Cc: Richard Fitzgerald rf@opensource.cirrus.com Cc: patches@opensource.cirrus.com Cc: stable@vger.kernel.org Signed-off-by: Jaroslav Kysela perex@perex.cz --- drivers/firmware/cirrus/test/cs_dsp_mock_bin.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/firmware/cirrus/test/cs_dsp_mock_bin.c b/drivers/firmware/cirrus/test/cs_dsp_mock_bin.c index 49d84f7e59e6..a0601b23b1bd 100644 --- a/drivers/firmware/cirrus/test/cs_dsp_mock_bin.c +++ b/drivers/firmware/cirrus/test/cs_dsp_mock_bin.c @@ -96,10 +96,11 @@ static void cs_dsp_mock_bin_add_name_or_info(struct cs_dsp_mock_bin_builder *bui

if (info_len % 4) { /* Create a padded string with length a multiple of 4 */ + size_t copy_len = info_len; info_len = round_up(info_len, 4); tmp = kunit_kzalloc(builder->test_priv->test, info_len, GFP_KERNEL); KUNIT_ASSERT_NOT_ERR_OR_NULL(builder->test_priv->test, tmp); - memcpy(tmp, info, info_len); + memcpy(tmp, info, copy_len); info = tmp; }