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| author | Lee Gibson <leegib@gmail.com> | 2021-04-19 15:58:42 +0100 |
|---|---|---|
| committer | Kalle Valo <kvalo@codeaurora.org> | 2021-04-22 17:40:12 +0300 |
| commit | 130f634da1af649205f4a3dd86cbe5c126b57914 (patch) | |
| tree | a90e9135a7a4a04b8c969af89349777c93c46f6e /drivers/net/wireless/quantenna/qtnfmac | |
| parent | a9a4c080deb33f44e08afe35f4ca4bb9ece89f4e (diff) | |
| download | linux-stable-130f634da1af649205f4a3dd86cbe5c126b57914.tar.gz linux-stable-130f634da1af649205f4a3dd86cbe5c126b57914.tar.bz2 linux-stable-130f634da1af649205f4a3dd86cbe5c126b57914.zip | |
qtnfmac: Fix possible buffer overflow in qtnf_event_handle_external_auth
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
Diffstat (limited to 'drivers/net/wireless/quantenna/qtnfmac')
| -rw-r--r-- | drivers/net/wireless/quantenna/qtnfmac/event.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/net/wireless/quantenna/qtnfmac/event.c b/drivers/net/wireless/quantenna/qtnfmac/event.c index c775c177933b..8dc80574d08d 100644 --- a/drivers/net/wireless/quantenna/qtnfmac/event.c +++ b/drivers/net/wireless/quantenna/qtnfmac/event.c @@ -570,8 +570,10 @@ qtnf_event_handle_external_auth(struct qtnf_vif *vif, return 0; if (ev->ssid_len) { - memcpy(auth.ssid.ssid, ev->ssid, ev->ssid_len); - auth.ssid.ssid_len = ev->ssid_len; + int len = clamp_val(ev->ssid_len, 0, IEEE80211_MAX_SSID_LEN); + + memcpy(auth.ssid.ssid, ev->ssid, len); + auth.ssid.ssid_len = len; } auth.key_mgmt_suite = le32_to_cpu(ev->akm_suite); |