On 3/12/2019 5:39 AM, Kangjie Lu wrote:
In case kmemdup fails, the fix sets conn_info->req_ie_len to zero
to avoid buffer overflows.
Hi Kangjie,
See comment below. Also for v3 change prefix 'net:brcm80211:' to
'brcmfmac:' instead.
Signed-off-by: Kangjie Lu <kjlu@xxxxxxx>
---
drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
index e92f6351bd22..5d9a3c35fef5 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
@@ -5464,6 +5464,8 @@ static s32 brcmf_get_assoc_ies(struct brcmf_cfg80211_info *cfg,
conn_info->req_ie =
kmemdup(cfg->extra_buf, conn_info->req_ie_len,
GFP_KERNEL);
+ if (!conn_info->req_ie)
+ conn_info->req_ie_len = 0;
good.
} else {
conn_info->req_ie_len = 0;
conn_info->req_ie = NULL;
@@ -5480,6 +5482,8 @@ static s32 brcmf_get_assoc_ies(struct brcmf_cfg80211_info *cfg,
conn_info->resp_ie =
kmemdup(cfg->extra_buf, conn_info->resp_ie_len,
GFP_KERNEL);
+ if (!conn_info->resp_ie)
+ conn_info->req_ie_len = 0;
bad! I think you took my comment too literal. Here it should set
conn_info->resp_ie_len to zero.
Regards,
Arend
} else {
conn_info->resp_ie_len = 0;
conn_info->resp_ie = NULL;
