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| author |   Zhang Xiaohui <ruc_zhangxiaohui@163.com> | 2020-12-06 16:48:01 +0800 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-01-09 13:44:55 +0100 |
| commit | 0a49aaf4df2936bca119ee38fe5a570a7024efdc (patch) | |
| tree | 289c39d0cc6c3a0d8adafd87db1a4138e8686cf1 | |
| parent | 117433236ae296d9770442960ddf57459177e90e (diff) | |
| download | linux-yocto-0a49aaf4df2936bca119ee38fe5a570a7024efdc.tar.gz linux-yocto-0a49aaf4df2936bca119ee38fe5a570a7024efdc.tar.bz2 linux-yocto-0a49aaf4df2936bca119ee38fe5a570a7024efdc.zip | |
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 d87aeff70cef..c2cb1e711c06 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", |