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cmd/gc: fix heap buffer overflow

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Fixes #8528.

LGTM=rsc
R=rsc, r, iant, bradfitz
CC=golang-codereviews
https://golang.org/cl/128230045
This commit is contained in:
Dmitriy Vyukov 2014-08-19 11:49:36 +04:00
parent b3d5a695a6
commit 53056c37c2
1 changed files with 4 additions and 1 deletions
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3
src/cmd/gc/bv.c
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@ -108,6 +108,9 @@ bvnext(Bvec *bv, int32 i)
{
uint32 w;
if(i >= bv->n)
return -1;
// Jump i ahead to next word with bits.
if((bv->b[i>>WORDSHIFT]>>(i&WORDMASK)) == 0) {
i &= ~WORDMASK;