From: Zhang Xiaohui <ruc_zhangxiao...@163.com>
mwifiex_config_scan() 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_zhangxiao...@163.com>
---
drivers/net/wireless/marvell/mwifiex/scan.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/net/wireless/marvell/mwifiex/scan.c
b/drivers/net/wireless/marvell/mwifiex/scan.c
index c2a685f63..b1d90678f 100644
--- a/drivers/net/wireless/marvell/mwifiex/scan.c
+++ b/drivers/net/wireless/marvell/mwifiex/scan.c
@@ -930,6 +930,8 @@ mwifiex_config_scan(struct mwifiex_private *priv,
"DIRECT-", 7))
wildcard_ssid_tlv->max_ssid_length = 0xfe;
+ if (ssid_len > 1)
+ ssid_len = 1;
memcpy(wildcard_ssid_tlv->ssid,
user_scan_in->ssid_list[i].ssid, ssid_len);
--
2.17.1
