KASAN reported out of bounds access - cs_dsp_mock_wmfw_add_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_wmfw.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/firmware/cirrus/test/cs_dsp_mock_wmfw.c b/drivers/firmware/cirrus/test/cs_dsp_mock_wmfw.c index 5a3ac03ac37f..4fa74550dafd 100644 --- a/drivers/firmware/cirrus/test/cs_dsp_mock_wmfw.c +++ b/drivers/firmware/cirrus/test/cs_dsp_mock_wmfw.c @@ -133,10 +133,11 @@ void cs_dsp_mock_wmfw_add_info(struct cs_dsp_mock_wmfw_builder *builder,

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; }