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brcmfmac: Fix double freeing in the fmac usb data path 

When the brcmf_fws_process_skb() fails to get hanger slot for
queuing the skb, it tries to free the skb.
But the caller brcmf_netdev_start_xmit() of that funciton frees
the packet on error return value.
This causes the double freeing and which caused the kernel crash.

Signed-off-by: Raveendran Somu <raveendran.somu@cypress.com>
Signed-off-by: Chi-hsien Lin <chi-hsien.lin@cypress.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/1585124429-97371-3-git-send-email-chi-hsien.lin@cypress.com
alistair/sensors
Raveendran Somu 2020-03-25 03:20:25 -05:00 committed by Kalle Valo
parent 93a5bfbc7c
commit 78179869dc
1 changed files with 1 additions and 2 deletions
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3
drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwsignal.c
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@ -2145,8 +2145,7 @@ int brcmf_fws_process_skb(struct brcmf_if *ifp, struct sk_buff *skb)
brcmf_fws_enq(fws, BRCMF_FWS_SKBSTATE_DELAYED, fifo, skb);
brcmf_fws_schedule_deq(fws);
} else {
bphy_err(drvr, "drop skb: no hanger slot\n");
brcmf_txfinalize(ifp, skb, false);
bphy_err(drvr, "no hanger slot available\n");
rc = -ENOMEM;
}
brcmf_fws_unlock(fws);