From: Dmitry Antipov Date: Mon, 9 Sep 2024 09:08:06 +0000 (+0300) Subject: wifi: cfg80211: fix two more possible UBSAN-detected off-by-one errors X-Git-Tag: v6.12-rc1~232^2~41^2~11 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=15ea13b1b1fbf6364d4cd568e65e4c8479632999;p=thirdparty%2Flinux.git wifi: cfg80211: fix two more possible UBSAN-detected off-by-one errors Although not reproduced in practice, these two cases may be considered by UBSAN as off-by-one errors. So fix them in the same way as in commit a26a5107bc52 ("wifi: cfg80211: fix UBSAN noise in cfg80211_wext_siwscan()"). Fixes: 807f8a8c3004 ("cfg80211/nl80211: add support for scheduled scans") Fixes: 5ba63533bbf6 ("cfg80211: fix alignment problem in scan request") Signed-off-by: Dmitry Antipov Link: https://patch.msgid.link/20240909090806.1091956-1-dmantipov@yandex.ru Signed-off-by: Johannes Berg --- diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 8bad3c6db39d9..9ab777e0bd4d3 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -9778,7 +9778,8 @@ nl80211_parse_sched_scan(struct wiphy *wiphy, struct wireless_dev *wdev, return ERR_PTR(-ENOMEM); if (n_ssids) - request->ssids = (void *)&request->channels[n_channels]; + request->ssids = (void *)request + + struct_size(request, channels, n_channels); request->n_ssids = n_ssids; if (ie_len) { if (n_ssids) diff --git a/net/wireless/sme.c b/net/wireless/sme.c index d9d7bf8bb5c1a..431da30817a6f 100644 --- a/net/wireless/sme.c +++ b/net/wireless/sme.c @@ -115,7 +115,8 @@ static int cfg80211_conn_scan(struct wireless_dev *wdev) n_channels = i; } request->n_channels = n_channels; - request->ssids = (void *)&request->channels[n_channels]; + request->ssids = (void *)request + + struct_size(request, channels, n_channels); request->n_ssids = 1; memcpy(request->ssids[0].ssid, wdev->conn->params.ssid,