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nl80211/cfg80211: fix potential infinite loop

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[ Upstream commit ba5c25236bc3d399df82ebe923490ea8d2d35cf2 ]

The for-loop iterates with a u8 loop counter and compares this
with the loop upper limit of request->n_ssids which is an int type.
There is a potential infinite loop if n_ssids is larger than the
u8 loop counter, so fix this by making the loop counter an int.

Addresses-Coverity: ("Infinite loop")
Fixes: c8cb5b854b40 ("nl80211/cfg80211: support 6 GHz scanning")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20201029222407.390218-1-colin.king@canonical.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Colin Ian King 2020-10-29 22:24:07 +00:00 committed by Greg Kroah-Hartman
parent 6e5ea342fc
commit 615bc1ba5b
1 changed files with 1 additions and 1 deletions
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2
net/wireless/scan.c
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@ -694,7 +694,7 @@ static void cfg80211_scan_req_add_chan(struct cfg80211_scan_request *request,
static bool cfg80211_find_ssid_match(struct cfg80211_colocated_ap *ap,
struct cfg80211_scan_request *request)
{
u8 i;
int i;
u32 s_ssid;
for (i = 0; i < request->n_ssids; i++) {