From: Hante Meuleman Date: Tue, 30 Sep 2014 08:23:17 +0000 (+0200) Subject: brcmfmac: Fix crash on cleanup. X-Git-Tag: firefly_0821_release~176^2~3001^2~75^2~30 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=58b2251e96d8230e81f65a0196afc914a17e1806;p=firefly-linux-kernel-4.4.55.git brcmfmac: Fix crash on cleanup. When driver gets unloaded due to error situation there is a chance a packet gets received while fws has already been cleaned up. This will result in kernel crash. This patch adds a check to avoid this crash. Reviewed-by: Arend Van Spriel Reviewed-by: Pieter-Paul Giesberts Signed-off-by: Hante Meuleman Signed-off-by: Arend van Spriel Signed-off-by: John W. Linville --- diff --git a/drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c b/drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c index d42f7d04b65f..183f08d7fc8c 100644 --- a/drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c +++ b/drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c @@ -1636,7 +1636,7 @@ int brcmf_fws_hdrpull(struct brcmf_pub *drvr, int ifidx, s16 signal_len, if (!signal_len) return 0; /* if flow control disabled, skip to packet data and leave */ - if (!fws->fw_signals) { + if ((!fws) || (!fws->fw_signals)) { skb_pull(skb, signal_len); return 0; }