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bn/bn_mod.c: harmonize BN_mod_add_quick with original implementation.

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New implementation failed to correctly reset r->neg flag. Spotted by
OSSFuzz.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/6783)
This commit is contained in:
Andy Polyakov 2018-07-25 10:29:51 +02:00
parent 06deb93286
commit 70a579ae2f
1 changed files with 1 additions and 0 deletions
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crypto/bn/bn_mod.c
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@ -83,6 +83,7 @@ int bn_mod_add_fixed_top(BIGNUM *r, const BIGNUM *a, const BIGNUM *b,
((volatile BN_ULONG *)tp)[i] = 0;
}
r->top = mtop;
r->neg = 0;
if (tp != storage)
OPENSSL_free(tp);