[PATCH] selftests: vDSO: Also test counter in vdso_test_chacha
Jason A. Donenfeld
Jason at zx2c4.com
Mon Sep 2 11:25:10 AEST 2024
On Sun, Sep 01, 2024 at 08:08:13PM +0200, Jason A. Donenfeld wrote:
> > + reference_chacha20_blocks(output1, key, counter1, BLOCKS);
> > + __arch_chacha20_blocks_nostack(output2, key, counter2, BLOCKS);
> > + if (memcmp(output1, output2, sizeof(output1)) ||
> > + memcmp(counter2, counter2, sizeof(counter1)))
> > + return KSFT_FAIL;
> > +
> > + reference_chacha20_blocks(output1, key, counter1, BLOCKS);
> > + __arch_chacha20_blocks_nostack(output2, key, counter2, BLOCKS);
> > + if (memcmp(output1, output2, sizeof(output1)) ||
> > + memcmp(counter2, counter2, sizeof(counter1)))
> > + return KSFT_FAIL;
> > +
>
> Why repeat these two stanzas?
Ah, from your commit message:
"The first test verifies that the function properly writes back the
upper word, the second test verifies that the function properly reads
back the upper word."
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