selftests/resctrl: Return NULL if malloc_and_init_memory() did not alloc mem

[ Upstream commit 22a8be280383812235131dda18a8212a59fadd2d ]

malloc_and_init_memory() in fill_buf isn't checking if memalign()
successfully allocated memory or not before accessing the memory.

Check the return value of memalign() and return NULL if allocating
aligned memory fails.

Fixes: a2561b12fe39 ("selftests/resctrl: Add built in benchmark")
Co-developed-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/tools/testing/selftests/resctrl/fill_buf.c b/tools/testing/selftests/resctrl/fill_buf.c
index 56ccbea..c20d0a7 100644 (file)
--- a/tools/testing/selftests/resctrl/fill_buf.c
+++ b/tools/testing/selftests/resctrl/fill_buf.c
@@ -68,6 +68,8 @@ static void *malloc_and_init_memory(size_t s)
        size_t s64;
 
        void *p = memalign(PAGE_SIZE, s);
+       if (!p)
+               return NULL;
 
        p64 = (uint64_t *)p;
        s64 = s / sizeof(uint64_t);