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Message-ID: <20240527141819.3854376-8-sashal@kernel.org>
Date: Mon, 27 May 2024 10:18:02 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
stable@...r.kernel.org
Cc: Kunwu Chan <chentao@...inos.cn>,
Muhammad Usama Anjum <usama.anjum@...labora.com>,
Will Deacon <will@...nel.org>,
Sasha Levin <sashal@...nel.org>,
catalin.marinas@....com,
shuah@...nel.org,
linux-arm-kernel@...ts.infradead.org,
linux-kselftest@...r.kernel.org
Subject: [PATCH AUTOSEL 5.15 08/13] kselftest: arm64: Add a null pointer check
From: Kunwu Chan <chentao@...inos.cn>
[ 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 <chentao@...inos.cn>
Reviewed-by: Muhammad Usama Anjum <usama.anjum@...labora.com>
Link: https://lore.kernel.org/r/20240423082102.2018886-1-chentao@kylinos.cn
Signed-off-by: Will Deacon <will@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
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 5701163460ef7..955f87c1170d7 100644
--- a/tools/testing/selftests/arm64/tags/tags_test.c
+++ b/tools/testing/selftests/arm64/tags/tags_test.c
@@ -6,6 +6,7 @@
#include <stdint.h>
#include <sys/prctl.h>
#include <sys/utsname.h>
+#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);
--
2.43.0
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