From 3915a252ce71b836a830bcc537220389a3acf3a5 Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Wed, 24 Jul 2019 09:38:15 -0500 Subject: [PATCH] libertas: Fix a double free in if_spi_c2h_data() The lbs_process_rxed_packet() frees the skb. It didn't originally, but we fixed it in commit f54930f36311 ("libertas: don't leak skb on receive error"). Reported-by: Dan Carpenter Signed-off-by: Dan Williams Signed-off-by: Kalle Valo --- drivers/net/wireless/marvell/libertas/if_spi.c | 14 +++++--------- 1 file changed, 5 insertions(+), 9 deletions(-) diff --git a/drivers/net/wireless/marvell/libertas/if_spi.c b/drivers/net/wireless/marvell/libertas/if_spi.c index 27067e79e83f..d07fe82c557e 100644 --- a/drivers/net/wireless/marvell/libertas/if_spi.c +++ b/drivers/net/wireless/marvell/libertas/if_spi.c @@ -766,19 +766,15 @@ static int if_spi_c2h_data(struct if_spi_card *card) /* Read the data from the WLAN module into our skb... */ err = spu_read(card, IF_SPI_DATA_RDWRPORT_REG, data, ALIGN(len, 4)); - if (err) - goto free_skb; + if (err) { + dev_kfree_skb(skb); + goto out; + } /* pass the SKB to libertas */ err = lbs_process_rxed_packet(card->priv, skb); - if (err) - goto free_skb; - - /* success */ - goto out; + /* lbs_process_rxed_packet() consumes the skb */ -free_skb: - dev_kfree_skb(skb); out: if (err) netdev_err(priv->dev, "%s: err=%d\n", __func__, err); -- 2.30.2