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Date: Sun, 9 Apr 2017 22:23:20 -0700 From: Myungho Jung <mhjungk@...il.com> To: chunkeey@...glemail.com Cc: netdev@...r.kernel.org, Myungho Jung <mhjungk@...il.com> Subject: [PATCH] p54: add null pointer check before releasing socket buffer Kernel panic is caused by trying to dereference null pointer. Check if the pointer is null before freeing space. Signed-off-by: Myungho Jung <mhjungk@...il.com> --- drivers/net/wireless/intersil/p54/txrx.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/intersil/p54/txrx.c b/drivers/net/wireless/intersil/p54/txrx.c index 1af7da0..8956061 100644 --- a/drivers/net/wireless/intersil/p54/txrx.c +++ b/drivers/net/wireless/intersil/p54/txrx.c @@ -503,7 +503,9 @@ static void p54_rx_eeprom_readback(struct p54_common *priv, priv->eeprom = NULL; tmp = p54_find_and_unlink_skb(priv, hdr->req_id); - dev_kfree_skb_any(tmp); + if (unlikely(!tmp)) + dev_kfree_skb_any(tmp); + complete(&priv->eeprom_comp); } @@ -597,7 +599,9 @@ static void p54_rx_stats(struct p54_common *priv, struct sk_buff *skb) } tmp = p54_find_and_unlink_skb(priv, hdr->req_id); - dev_kfree_skb_any(tmp); + if (unlikely(!tmp)) + dev_kfree_skb_any(tmp); + complete(&priv->stat_comp); } -- 2.7.4
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