Le lundi 06 décembre 2010 à 08:01 +0800, Changli Gao a écrit : > How about using skb_headroom(skb) < ETH_HLEN ? >
Yes, good idea, thanks ! [PATCH net-2.6] net: fix skb_defer_rx_timestamp() After commit c1f19b51d1d8 (net: support time stamping in phy devices.), kernel might crash if CONFIG_NETWORK_PHY_TIMESTAMPING=y and skb_defer_rx_timestamp() handles a packet without an ethernet header. Fixes kernel bugzilla #24102 Reference: https://bugzilla.kernel.org/show_bug.cgi?id=24102 Reported-and-tested-by: Andrew Watts <[email protected]> Signed-off-by: Eric Dumazet <[email protected]> Cc: Richard Cochran <[email protected]> Cc: Changli Gao <[email protected]> Cc: [email protected] --- net/core/timestamping.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/net/core/timestamping.c b/net/core/timestamping.c index 0ae6c22..c19bb4e 100644 --- a/net/core/timestamping.c +++ b/net/core/timestamping.c @@ -96,11 +96,13 @@ bool skb_defer_rx_timestamp(struct sk_buff *skb) struct phy_device *phydev; unsigned int type; - skb_push(skb, ETH_HLEN); + if (skb_headroom(skb) < ETH_HLEN) + return false; + __skb_push(skb, ETH_HLEN); type = classify(skb); - skb_pull(skb, ETH_HLEN); + __skb_pull(skb, ETH_HLEN); switch (type) { case PTP_CLASS_V1_IPV4: _______________________________________________ stable mailing list [email protected] http://linux.kernel.org/mailman/listinfo/stable
