diff options
| author | Zhang Xiaohui <ruc_zhangxiaohui@163.com> | 2020-12-06 11:48:01 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-01-09 15:46:25 +0300 |
| commit | 94cc73b27a2599e4c88b7b2d6fd190107c58e480 (patch) | |
| tree | 63e62baf95a80b8f218a1d78f1835961bc3a86a6 | |
| parent | ab7709b551de24e7bebf44946120e6740b1e28db (diff) | |
| download | linux-94cc73b27a2599e4c88b7b2d6fd190107c58e480.tar.xz | |
mwifiex: Fix possible buffer overflows in mwifiex_cmd_802_11_ad_hoc_start
[ Upstream commit 5c455c5ab332773464d02ba17015acdca198f03d ]
mwifiex_cmd_802_11_ad_hoc_start() calls memcpy() without checking
the destination size may trigger a buffer overflower,
which a local user could use to cause denial of service
or the execution of arbitrary code.
Fix it by putting the length check before calling memcpy().
Signed-off-by: Zhang Xiaohui <ruc_zhangxiaohui@163.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20201206084801.26479-1-ruc_zhangxiaohui@163.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/net/wireless/marvell/mwifiex/join.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/net/wireless/marvell/mwifiex/join.c b/drivers/net/wireless/marvell/mwifiex/join.c index 5934f7147547..173ccf79cbfc 100644 --- a/drivers/net/wireless/marvell/mwifiex/join.c +++ b/drivers/net/wireless/marvell/mwifiex/join.c @@ -877,6 +877,8 @@ mwifiex_cmd_802_11_ad_hoc_start(struct mwifiex_private *priv, memset(adhoc_start->ssid, 0, IEEE80211_MAX_SSID_LEN); + if (req_ssid->ssid_len > IEEE80211_MAX_SSID_LEN) + req_ssid->ssid_len = IEEE80211_MAX_SSID_LEN; memcpy(adhoc_start->ssid, req_ssid->ssid, req_ssid->ssid_len); mwifiex_dbg(adapter, INFO, "info: ADHOC_S_CMD: SSID = %s\n", |