| From | Ben Hutchings <> | Date | Sat, 27 Apr 2019 16:13:09 +0100 | Subject | [PATCH 3.16 192/202] brcmfmac: assure SSID length from firmware is limited |
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3.16.66-rc1 review patch. If anyone has any objections, please let me know.
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From: Arend van Spriel <arend.vanspriel@broadcom.com>
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 <hante.meuleman@broadcom.com> Reviewed-by: Pieter-Paul Giesberts <pieter-paul.giesberts@broadcom.com> Reviewed-by: Franky Lin <franky.lin@broadcom.com> Signed-off-by: Arend van Spriel <arend.vanspriel@broadcom.com> Signed-off-by: Kalle Valo <kvalo@codeaurora.org> [bwh: Backported to 3.16: adjust filename, context] Signed-off-by: Ben Hutchings <ben@decadent.org.uk> --- drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c +++ b/drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c @@ -3082,6 +3082,8 @@ brcmf_notify_sched_scan_results(struct b brcmf_dbg(SCAN, "SSID:%s Channel:%d\n", netinfo->SSID, netinfo->channel); + if (netinfo->SSID_len > IEEE80211_MAX_SSID_LEN) + netinfo->SSID_len = IEEE80211_MAX_SSID_LEN; memcpy(ssid[i].ssid, netinfo->SSID, netinfo->SSID_len); ssid[i].ssid_len = netinfo->SSID_len; request->n_ssids++;
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