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[5/6] brcmfmac: Fix crash on cleanup.

Message ID 1412065398-14316-6-git-send-email-arend@broadcom.com (mailing list archive)
State Not Applicable, archived
Headers show

Commit Message

Arend van Spriel Sept. 30, 2014, 8:23 a.m. UTC 
From: Hante Meuleman <meuleman@broadcom.com>

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 <arend@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Signed-off-by: Hante Meuleman <meuleman@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
---
 drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c b/drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c
index d42f7d0..183f08d 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;
 	}