github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-06-07 22:14:04 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

qtnfmac: Fix possible buffer overflow in qtnf_event_handle_external_auth

Browse Source 
[ Upstream commit 130f634da1 ]

Function qtnf_event_handle_external_auth calls memcpy without
checking the length.
A user could control that length and trigger a buffer overflow.
Fix by checking the length is within the maximum allowed size.

Signed-off-by: Lee Gibson <leegib@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20210419145842.345787-1-leegib@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Lee Gibson 2021-04-19 15:58:42 +01:00 committed by Greg Kroah-Hartman
parent ededc7325d
commit bece6aea36
1 changed files with 4 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/net/wireless/quantenna/qtnfmac/event.c
View File

@ -570,8 +570,10 @@ qtnf_event_handle_external_auth(struct qtnf_vif *vif,
return 0; return 0;
if (ev->ssid_len) { if (ev->ssid_len) {
memcpy(auth.ssid.ssid, ev->ssid, ev->ssid_len); int len = clamp_val(ev->ssid_len, 0, IEEE80211_MAX_SSID_LEN);
auth.ssid.ssid_len = ev->ssid_len;
memcpy(auth.ssid.ssid, ev->ssid, len);
auth.ssid.ssid_len = len;
} }
auth.key_mgmt_suite = le32_to_cpu(ev->akm_suite); auth.key_mgmt_suite = le32_to_cpu(ev->akm_suite);