Am 22.02.22 um 12:30 schrieb xkernel.wang@xxxxxxxxxxx:
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>
Acked-by: Christian König <christian.koenig@xxxxxxx>
---
drivers/dma-buf/selftest.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/dma-buf/selftest.c b/drivers/dma-buf/selftest.c
index c60b694..2c29e2a 100644
--- a/drivers/dma-buf/selftest.c
+++ b/drivers/dma-buf/selftest.c
@@ -50,6 +50,9 @@ static bool apply_subtest_filter(const char *caller, const char *name)
bool result = true;
filter = kstrdup(__st_filter, GFP_KERNEL);
+ if (!filter)
+ return false;
+
for (sep = filter; (tok = strsep(&sep, ","));) {
bool allow = true;
char *sl;
