On 30/12/24 12:36, Kees Cook wrote:
Since adding __counted_by(n_channels) to struct cfg80211_scan_request,
anything adding to the channels array must increment n_channels first.
Move n_channels increment earlier.
Reported-by: John Rowley <lkml@xxxxxxxxxxxxx>
Closes: https://lore.kernel.org/stable/1815535c709ba9d9.156c6a5c9cdf6e59.b249b6b6a5ee4634@localhost.localdomain/
Fixes: aa4ec06c455d ("wifi: cfg80211: use __counted_by where appropriate")
Signed-off-by: Kees Cook <kees@xxxxxxxxxx>
Reviewed-by: Gustavo A. R. Silva <gustavoars@xxxxxxxxxx>
-Gustavo
---
Cc: Johannes Berg <johannes@xxxxxxxxxxxxxxxx>
Cc: Dmitry Antipov <dmantipov@xxxxxxxxx>
Cc: Nathan Chancellor <nathan@xxxxxxxxxx>
Cc: linux-wireless@xxxxxxxxxxxxxxx
---
net/wireless/scan.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/net/wireless/scan.c b/net/wireless/scan.c
index 1c6fd45aa809..ccdbeb604639 100644
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -763,12 +763,11 @@ static void cfg80211_scan_req_add_chan(struct cfg80211_scan_request *request,
}
}
+ request->n_channels++;
request->channels[n_channels] = chan;
if (add_to_6ghz)
request->scan_6ghz_params[request->n_6ghz_params].channel_idx =
n_channels;
-
- request->n_channels++;
}
static bool cfg80211_find_ssid_match(struct cfg80211_colocated_ap *ap,
