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kselftest: vDSO: Fix accumulation of uninitialized ret when CLOCK_REALTIME is undefined

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[ Upstream commit 375b9ff53c ]

In the unlikely case that CLOCK_REALTIME is not defined, variable ret is
not initialized and further accumulation of return values to ret can leave
ret in an undefined state. Fix this by initialized ret to zero and changing
the assignment of ret to an accumulation for the CLOCK_REALTIME case.

Fixes: 03f55c7952 ("kselftest: Extend vDSO selftest to clock_getres")
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Reviewed-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Colin Ian King 2023-04-17 11:47:43 +01:00 • committed by Justin Hammond
parent 1b2df793ae
commit 97a9a6e27b
1 changed files with 2 additions and 2 deletions
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4
tools/testing/selftests/vDSO/vdso_test_clock_getres.c
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@ -84,12 +84,12 @@ static inline int vdso_test_clock(unsigned int clock_id)
int main(int argc, char **argv)
{
int ret;
int ret = 0;
#if _POSIX_TIMERS > 0
#ifdef CLOCK_REALTIME
ret = vdso_test_clock(CLOCK_REALTIME);
ret += vdso_test_clock(CLOCK_REALTIME);
#endif
#ifdef CLOCK_BOOTTIME