package/kernel/mac80211/patches/brcm/349-v5.1-0001-brcmfmac-assure-SSID-length-from-firmware-is-limited.patch

   1 From 1b5e2423164b3670e8bc9174e4762d297990deff Mon Sep 17 00:00:00 2001
   2 From: Arend van Spriel <arend.vanspriel@broadcom.com>
   3 Date: Thu, 14 Feb 2019 13:43:47 +0100
   4 Subject: [PATCH] brcmfmac: assure SSID length from firmware is limited
   5
   6 The SSID length as received from firmware should not exceed
   7 IEEE80211_MAX_SSID_LEN as that would result in heap overflow.
   8
   9 Reviewed-by: Hante Meuleman <hante.meuleman@broadcom.com>
  10 Reviewed-by: Pieter-Paul Giesberts <pieter-paul.giesberts@broadcom.com>
  11 Reviewed-by: Franky Lin <franky.lin@broadcom.com>
  12 Signed-off-by: Arend van Spriel <arend.vanspriel@broadcom.com>
  13 Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
  14 ---
  15  drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c | 2 ++
  16  1 file changed, 2 insertions(+)
  17
  18 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
  19 +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
  20 @@ -3499,6 +3499,8 @@ brcmf_wowl_nd_results(struct brcmf_if *i
  21         }
  22
  23         netinfo = brcmf_get_netinfo_array(pfn_result);
  24 +       if (netinfo->SSID_len > IEEE80211_MAX_SSID_LEN)
  25 +               netinfo->SSID_len = IEEE80211_MAX_SSID_LEN;
  26         memcpy(cfg->wowl.nd->ssid.ssid, netinfo->SSID, netinfo->SSID_len);
  27         cfg->wowl.nd->ssid.ssid_len = netinfo->SSID_len;
  28         cfg->wowl.nd->n_channels = 1;