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regulatory: don't write past array when intersecting rules 

When intersecting rules, we count first to know how many
rules need to be allocated, and then do the intersection
into the allocated array. However, the code doing this
writes past the end of the array because it attempts to
do all intersections. Make it stop when the right number
of rules has been reached.

Acked-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2012-12-06 17:03:17 +01:00
parent 10ff57f98d
commit 8a57fff0c1
1 changed files with 2 additions and 2 deletions
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4
net/wireless/reg.c
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@ -647,9 +647,9 @@ static struct ieee80211_regdomain *regdom_intersect(
if (!rd)
return NULL;
for (x = 0; x < rd1->n_reg_rules; x++) {
for (x = 0; x < rd1->n_reg_rules && rule_idx < num_rules; x++) {
rule1 = &rd1->reg_rules[x];
for (y = 0; y < rd2->n_reg_rules; y++) {
for (y = 0; y < rd2->n_reg_rules && rule_idx < num_rules; y++) {
rule2 = &rd2->reg_rules[y];
/*
* This time around instead of using the stack lets