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Commit b35029a1 authored by Zhang Xiaohui's avatar Zhang Xiaohui Committed by Greg Kroah-Hartman
Browse files

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: default avatarZhang Xiaohui <ruc_zhangxiaohui@163.com>
Signed-off-by: default avatarKalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20201206084801.26479-1-ruc_zhangxiaohui@163.com


Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent f817a993

drivers/net/wireless/marvell/mwifiex/join.c

+2 −0
Original line number Diff line number Diff line
@@ -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",