From: Per Forlin <per.for...@gmail.com>

In fwsignal.c: brcmf_fws_commit_skb()
...
if (rc < 0) {
  entry->transit_count--;
    if (entry->suppressed)
      entry->suppr_transit_count--;
      (void)brcmf_proto_hdrpull(fws->drvr, false, skb, NULL);
                                                     ^^^^^^^
    goto rollback;
}
...

The call to hdrpull will trigger a null pointer exception
unless a null check is made in the method implementation.

Signed-off-by: Per Forlin <per.for...@gmail.com>
---
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcdc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcdc.c 
b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcdc.c
index 6af658e..81727da2 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcdc.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcdc.c
@@ -321,7 +321,8 @@ brcmf_proto_bcdc_hdrpull(struct brcmf_pub *drvr, bool 
do_fws,
        if (pktbuf->len == 0)
                return -ENODATA;
 
-       *ifp = tmp_if;
+       if (ifp != NULL)
+               *ifp = tmp_if;
        return 0;
 }
 
-- 
2.1.4

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