From: Xiaoke Wang xkernel.wang@foxmail.com

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@foxmail.com --- 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; --