From: Xiaoke Wang <xkernel.wang@xxxxxxxxxxx>
kstrdup() is a memory allocation function which can return NULL when
some internaly memory errors happen. It is better to check the return
value of it to prevent further wrong memory access.
Signed-off-by: Xiaoke Wang <xkernel.wang@xxxxxxxxxxx>
---
drivers/gpu/drm/i915/selftests/i915_selftest.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/i915/selftests/i915_selftest.c b/drivers/gpu/drm/i915/selftests/i915_selftest.c
index 484759c..1bcd065 100644
--- a/drivers/gpu/drm/i915/selftests/i915_selftest.c
+++ b/drivers/gpu/drm/i915/selftests/i915_selftest.c
@@ -246,6 +246,9 @@ static bool apply_subtest_filter(const char *caller, const char *name)
bool result = true;
filter = kstrdup(i915_selftest.filter, GFP_KERNEL);
+ if (!filter)
+ return false;
+
for (sep = filter; (tok = strsep(&sep, ","));) {
bool allow = true;
char *sl;
--
