Since the driver is broken in the case that src->freq_supported is not NULL but src->freq_supported_num is 0, add an assertion for it.

Signed-off-by: Jiasheng Jiang jiashengjiangcool@gmail.com --- Changelog:

v3 -> v4:

1. Add return after WARN_ON().

v2 -> v3:

1. Add "net-next" to the subject. 2. Remove the "Fixes" tag and "Cc: stable". 3. Replace BUG_ON with WARN_ON.

v1 -> v2:

1. Replace the check with an assertion. --- drivers/dpll/dpll_core.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/dpll/dpll_core.c b/drivers/dpll/dpll_core.c index 32019dc33cca..940c26b9dd53 100644 --- a/drivers/dpll/dpll_core.c +++ b/drivers/dpll/dpll_core.c @@ -443,8 +443,11 @@ static void dpll_pin_prop_free(struct dpll_pin_properties *prop) static int dpll_pin_prop_dup(const struct dpll_pin_properties *src, struct dpll_pin_properties *dst) { + if (WARN_ON(src->freq_supported && !src->freq_supported_num)) + return -EINVAL; + memcpy(dst, src, sizeof(*dst)); - if (src->freq_supported && src->freq_supported_num) { + if (src->freq_supported) { size_t freq_size = src->freq_supported_num * sizeof(*src->freq_supported); dst->freq_supported = kmemdup(src->freq_supported,