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Fix potential invalid read past end of array

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If array has N elements, we can't read +1 if we are already at N.

Also, we need to move elements by their storage size in the array,
not just by individual bytes.
This commit is contained in:
Matt Stancliff 2015-01-14 11:10:25 -05:00 committed by antirez
parent 30152554ea
commit 29049507ec
1 changed files with 5 additions and 2 deletions
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7
src/cluster.c
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@ -783,8 +783,11 @@ int clusterNodeRemoveSlave(clusterNode *master, clusterNode *slave) {
for (j = 0; j < master->numslaves; j++) {
if (master->slaves[j] == slave) {
memmove(master->slaves+j,master->slaves+(j+1),
(master->numslaves-1)-j);
if ((j+1) < master->numslaves) {
int remaining_slaves = (master->numslaves - j) - 1;
memmove(master->slaves+j,master->slaves+(j+1),
(sizeof(*master->slaves) * remaining_slaves));
}
master->numslaves--;
return REDIS_OK;
}