6.10-stable review patch. If anyone has any objections, please let me know.
------------------
From: Richard Fitzgerald <rf@xxxxxxxxxxxxxxxxxxxxx>
[ Upstream commit bff980d8d9ca537fd5f3c0e9a99876c1e3713e81 ]
For a normal calibration blob the calTarget values must be non-zero and
unique, and the calTime values must be non-zero. Don't rely on
get_random_bytes() to be random enough to guarantee this. Force the
calTarget and calTime values to be valid while retaining randomness
in the values.
Signed-off-by: Richard Fitzgerald <rf@xxxxxxxxxxxxxxxxxxxxx>
Fixes: 177862317a98 ("ASoC: cs-amp-lib: Add KUnit test for calibration helpers")
Link: https://patch.msgid.link/20240822115725.259568-1-rf@xxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
sound/soc/codecs/cs-amp-lib-test.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/sound/soc/codecs/cs-amp-lib-test.c b/sound/soc/codecs/cs-amp-lib-test.c
index 15f991b2e16e2..8169ec88a8ba8 100644
--- a/sound/soc/codecs/cs-amp-lib-test.c
+++ b/sound/soc/codecs/cs-amp-lib-test.c
@@ -38,6 +38,7 @@ static void cs_amp_lib_test_init_dummy_cal_blob(struct kunit *test, int num_amps
{
struct cs_amp_lib_test_priv *priv = test->priv;
unsigned int blob_size;
+ int i;
blob_size = offsetof(struct cirrus_amp_efi_data, data) +
sizeof(struct cirrus_amp_cal_data) * num_amps;
@@ -49,6 +50,14 @@ static void cs_amp_lib_test_init_dummy_cal_blob(struct kunit *test, int num_amps
priv->cal_blob->count = num_amps;
get_random_bytes(priv->cal_blob->data, sizeof(struct cirrus_amp_cal_data) * num_amps);
+
+ /* Ensure all timestamps are non-zero to mark the entry valid. */
+ for (i = 0; i < num_amps; i++)
+ priv->cal_blob->data[i].calTime[0] |= 1;
+
+ /* Ensure that all UIDs are non-zero and unique. */
+ for (i = 0; i < num_amps; i++)
+ *(u8 *)&priv->cal_blob->data[i].calTarget[0] = i + 1;
}
static u64 cs_amp_lib_test_get_target_uid(struct kunit *test)
--
2.43.0
