diff options
| -rw-r--r-- | src/ext/ed25519/donna/modm-donna-64bit.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/ext/ed25519/donna/modm-donna-64bit.h b/src/ext/ed25519/donna/modm-donna-64bit.h index b22df2be75..012ea9ea08 100644 --- a/src/ext/ed25519/donna/modm-donna-64bit.h +++ b/src/ext/ed25519/donna/modm-donna-64bit.h @@ -261,6 +261,10 @@ contract256_slidingwindow_modm(signed char r[256], const bignum256modm s, int wi continue; 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) { r[j] += r[j + b] << b; r[j + b] = 0; |