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Add a comment about CID 1311630 and why we won't worry about it.

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This commit is contained in:
Nick Mathewson 2015-09-01 09:43:37 -04:00
parent a55f257d6a
commit 53c99cce5e
1 changed files with 4 additions and 0 deletions
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4
src/ext/ed25519/donna/modm-donna-64bit.h
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@ -261,6 +261,10 @@ contract256_slidingwindow_modm(signed char r[256], const bignum256modm s, int wi
continue; continue;
for (b = 1; (b < (soplen - j)) && (b <= 6); b++) { for (b = 1; (b < (soplen - j)) && (b <= 6); b++) {
/* XXX Tor: coverity scan says that r[j+b] can
* overflow, but that's not possible: b < (soplen-j)
* guarantees that b + j < soplen, so b+j < 256,
* so the index doesn't overflow. */
if ((r[j] + (r[j + b] << b)) <= m) { if ((r[j] + (r[j + b] << b)) <= m) {
r[j] += r[j + b] << b; r[j] += r[j + b] << b;
r[j + b] = 0; r[j + b] = 0;