4.19-stable review patch. If anyone has any objections, please let me know.
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From: Dmitry Antipov dmantipov@yandex.ru
[ Upstream commit 15ea13b1b1fbf6364d4cd568e65e4c8479632999 ]
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 dmantipov@yandex.ru Link: https://patch.msgid.link/20240909090806.1091956-1-dmantipov@yandex.ru Signed-off-by: Johannes Berg johannes.berg@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- net/wireless/nl80211.c | 3 ++- net/wireless/sme.c | 3 ++- 2 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index ebd8449f2fcf1..f3f01ab1abd38 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -7578,7 +7578,8 @@ 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 ebc73faa8fb18..4e6afb765e815 100644 --- a/net/wireless/sme.c +++ b/net/wireless/sme.c @@ -116,7 +116,8 @@ 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,