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, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/wireless/marvell/mwifiex/scan.c
b/drivers/net/wireless/marvell/mwifiex/scan.c
index c2a685f63..34293fd80 100644
--- a/drivers/net/wireless/marvell/mwifiex/scan.c
+++ b/drivers/net/wireless/marvell/mwifiex/scan.c
@@ -931,7 +931,7 @@ mwifiex_config_scan(struct mwifiex_private *priv,
wildcard_ssid_tlv->max_ssid_length = 0xfe;
memcpy(wildcard_ssid_tlv->ssid,
- user_scan_in->ssid_list[i].ssid, ssid_len);
+ user_scan_in->ssid_list[i].ssid, min_t(u32,
ssid_len, 1));
tlv_pos += (sizeof(wildcard_ssid_tlv->header)
+ le16_to_cpu(wildcard_ssid_tlv->header.len));
--
2.17.1
