From f322f88a0645dbc519454df9e3182bb1a0fbfe7b Mon Sep 17 00:00:00 2001 From: Kunwu Chan Date: Tue, 23 Apr 2024 16:21:02 +0800 Subject: [PATCH] kselftest: arm64: Add a null pointer check [ Upstream commit 80164282b3620a3cb73de6ffda5592743e448d0e ] There is a 'malloc' call, which can be unsuccessful. This patch will add the malloc failure checking to avoid possible null dereference and give more information about test fail reasons. Signed-off-by: Kunwu Chan Reviewed-by: Muhammad Usama Anjum Link: https://lore.kernel.org/r/20240423082102.2018886-1-chentao@kylinos.cn Signed-off-by: Will Deacon Signed-off-by: Sasha Levin --- tools/testing/selftests/arm64/tags/tags_test.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/tools/testing/selftests/arm64/tags/tags_test.c b/tools/testing/selftests/arm64/tags/tags_test.c index 5701163460ef..955f87c1170d 100644 --- a/tools/testing/selftests/arm64/tags/tags_test.c +++ b/tools/testing/selftests/arm64/tags/tags_test.c @@ -6,6 +6,7 @@ #include #include #include +#include "../../kselftest.h" #define SHIFT_TAG(tag) ((uint64_t)(tag) << 56) #define SET_TAG(ptr, tag) (((uint64_t)(ptr) & ~SHIFT_TAG(0xff)) | \ @@ -21,6 +22,9 @@ int main(void) if (prctl(PR_SET_TAGGED_ADDR_CTRL, PR_TAGGED_ADDR_ENABLE, 0, 0, 0) == 0) tbi_enabled = 1; ptr = (struct utsname *)malloc(sizeof(*ptr)); + if (!ptr) + ksft_exit_fail_msg("Failed to allocate utsname buffer\n"); + if (tbi_enabled) tag = 0x42; ptr = (struct utsname *)SET_TAG(ptr, tag);