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kselftest: arm64: Add a null pointer check
[ Upstream commit 80164282b3
]
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@kylinos.cn>
Reviewed-by: Muhammad Usama Anjum <usama.anjum@collabora.com>
Link: https://lore.kernel.org/r/20240423082102.2018886-1-chentao@kylinos.cn
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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1 changed files with 4 additions and 0 deletions
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@ -6,6 +6,7 @@
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#include <stdint.h>
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#include <sys/prctl.h>
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#include <sys/utsname.h>
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#include "../../kselftest.h"
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#define SHIFT_TAG(tag) ((uint64_t)(tag) << 56)
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#define SET_TAG(ptr, tag) (((uint64_t)(ptr) & ~SHIFT_TAG(0xff)) | \
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@ -21,6 +22,9 @@ int main(void)
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if (prctl(PR_SET_TAGGED_ADDR_CTRL, PR_TAGGED_ADDR_ENABLE, 0, 0, 0) == 0)
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tbi_enabled = 1;
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ptr = (struct utsname *)malloc(sizeof(*ptr));
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if (!ptr)
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ksft_exit_fail_msg("Failed to allocate utsname buffer\n");
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if (tbi_enabled)
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tag = 0x42;
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ptr = (struct utsname *)SET_TAG(ptr, tag);
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