random-drbg: fix missing error check from _gcry_rngdrbg_cavs_test()#15
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The return value of `_gcry_rngdrbg_cavs_test()` was immediately overwritten by `memcmp()` result, leading to potential loss of error information. This could cause the health check to succeed even if the internal CAVS test function failed. This issue was reported by a static analyzer: > Return value of function '_gcry_rngdrbg_cavs_test' passed to 'ret' > at random-drbg.c:2378 will be rewritten later. To fix this, we now check the return code of `_gcry_rngdrbg_cavs_test()` and only call `memcmp()` if the test execution succeeded. Signed-off-by: Anton Moryakov <ant.v.moryakov@gmail.com>
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The return value of
_gcry_rngdrbg_cavs_test()was immediately overwritten bymemcmp()result, leading to potential loss of error information. This could cause the health check to succeed even if the internal CAVS test function failed.This issue was reported by a static analyzer:
To fix this, we now check the return code of
_gcry_rngdrbg_cavs_test()and only callmemcmp()if the test execution succeeded.