From: Arend van Spriel <[email protected]> commit 1b5e2423164b3670e8bc9174e4762d297990deff upstream.
The SSID length as received from firmware should not exceed IEEE80211_MAX_SSID_LEN as that would result in heap overflow. Reviewed-by: Hante Meuleman <[email protected]> Reviewed-by: Pieter-Paul Giesberts <[email protected]> Reviewed-by: Franky Lin <[email protected]> Signed-off-by: Arend van Spriel <[email protected]> Signed-off-by: Kalle Valo <[email protected]> [bwh: Backported to 4.9: adjust context] Signed-off-by: Ben Hutchings <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c @@ -3579,6 +3579,8 @@ brcmf_wowl_nd_results(struct brcmf_if *i data += sizeof(struct brcmf_pno_scanresults_le); netinfo = (struct brcmf_pno_net_info_le *)data; + if (netinfo->SSID_len > IEEE80211_MAX_SSID_LEN) + netinfo->SSID_len = IEEE80211_MAX_SSID_LEN; memcpy(cfg->wowl.nd->ssid.ssid, netinfo->SSID, netinfo->SSID_len); cfg->wowl.nd->ssid.ssid_len = netinfo->SSID_len; cfg->wowl.nd->n_channels = 1;
