Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 5.8 168/633] brcmfmac: check ndev pointer | Date | Tue, 27 Oct 2020 14:48:31 +0100 |
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From: Tom Rix <trix@redhat.com>
[ Upstream commit 9c9f015bc9f8839831c7ba0a6d731a3853c464e2 ]
Clang static analysis reports this error
brcmfmac/core.c:490:4: warning: Dereference of null pointer (*ifp)->ndev->stats.rx_errors++; ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In this block of code
if (ret || !(*ifp) || !(*ifp)->ndev) { if (ret != -ENODATA && *ifp) (*ifp)->ndev->stats.rx_errors++; brcmu_pkt_buf_free_skb(skb); return -ENODATA; }
(*ifp)->ndev being NULL is caught as an error But then it is used to report the error.
So add a check before using it.
Fixes: 91b632803ee4 ("brcmfmac: Use net_device_stats from struct net_device") Signed-off-by: Tom Rix <trix@redhat.com> Signed-off-by: Kalle Valo <kvalo@codeaurora.org> Link: https://lore.kernel.org/r/20200802161804.6126-1-trix@redhat.com Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c index c88655acc78c7..76b478f70b4bb 100644 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c @@ -483,7 +483,7 @@ static int brcmf_rx_hdrpull(struct brcmf_pub *drvr, struct sk_buff *skb, ret = brcmf_proto_hdrpull(drvr, true, skb, ifp); if (ret || !(*ifp) || !(*ifp)->ndev) { - if (ret != -ENODATA && *ifp) + if (ret != -ENODATA && *ifp && (*ifp)->ndev) (*ifp)->ndev->stats.rx_errors++; brcmu_pkt_buf_free_skb(skb); return -ENODATA; -- 2.25.1
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