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brcmfmac: To fix kernel crash on out of boundary access

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To truncate the additional bytes, if extra bytes have been received.
Current code only have a warning and proceed without handling it.
But in one of the crash reported by DVT, these causes the
crash intermittently. So the processing is limit to the skb->len.

Signed-off-by: Raveendran Somu <raveendran.somu@cypress.com>
Signed-off-by: Chi-hsien Lin <chi-hsien.lin@cypress.com>
Signed-off-by: Wright Feng <wright.feng@cypress.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200604071835.3842-2-wright.feng@cypress.com
This commit is contained in:
Raveendran Somu 2020-06-04 02:18:31 -05:00 committed by Kalle Valo
parent f555abfe29
commit 698bae2e6e
1 changed files with 3 additions and 0 deletions
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3
drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwsignal.c
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@ -1843,6 +1843,9 @@ void brcmf_fws_hdrpull(struct brcmf_if *ifp, s16 siglen, struct sk_buff *skb)
WARN_ON(siglen > skb->len);
if (siglen > skb->len)
siglen = skb->len;
if (!siglen)
return;
/* if flow control disabled, skip to packet data and leave */