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crypto: lrw - fix rebase error after out of bounds fix

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Due to an unfortunate interaction between commit fbe1a850b3b1
("crypto: lrw - Fix out-of bounds access on counter overflow") and
commit c778f96bf347 ("crypto: lrw - Optimize tweak computation"),
we ended up with a version of next_index() that always returns 127.

Fixes: c778f96bf347 ("crypto: lrw - Optimize tweak computation")
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Ondrej Mosnacek <omosnace@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Ard Biesheuvel 2018-09-30 21:51:16 +02:00 committed by Herbert Xu
parent 5155e118dd
commit fd27b571c9
1 changed files with 3 additions and 4 deletions
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7
crypto/lrw.c
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@ -122,10 +122,9 @@ static int next_index(u32 *counter)
int i, res = 0;
for (i = 0; i < 4; i++) {
if (counter[i] + 1 != 0) {
res += ffz(counter[i]++);
break;
}
if (counter[i] + 1 != 0)
return res + ffz(counter[i]++);
counter[i] = 0;
res += 32;
}