5.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Heiner Kallweit <hkallweit1@xxxxxxxxx> [ Upstream commit 1d155dfdf50efc2b0793bce93c06d1a5b23d0877 ] In bug report [0] a warning in r8169 driver was reported that was caused by an invalid GSO SKB (gso_type was 0). See [1] for a discussion about this issue. Still the origin of the invalid GSO SKB isn't clear. It shouldn't be a network drivers task to check for invalid GSO SKB's. Also, even if issue [0] can be fixed, we can't be sure that a similar issue doesn't pop up again at another place. Therefore let gso_features_check() check for such invalid GSO SKB's. [0] https://bugzilla.kernel.org/show_bug.cgi?id=209423 [1] https://www.spinics.net/lists/netdev/msg690794.html Signed-off-by: Heiner Kallweit <hkallweit1@xxxxxxxxx> Link: https://lore.kernel.org/r/97c78d21-7f0b-d843-df17-3589f224d2cf@xxxxxxxxx Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx> Stable-dep-of: 24ab059d2ebd ("net: check dev->gso_max_size in gso_features_check()") Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- net/core/dev.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/net/core/dev.c b/net/core/dev.c index a381e87fb380b..9845dcf0a3ded 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -3140,6 +3140,11 @@ static netdev_features_t gso_features_check(const struct sk_buff *skb, if (gso_segs > dev->gso_max_segs) return features & ~NETIF_F_GSO_MASK; + if (!skb_shinfo(skb)->gso_type) { + skb_warn_bad_offload(skb); + return features & ~NETIF_F_GSO_MASK; + } + /* Support for GSO partial features requires software * intervention before we can actually process the packets * so we need to strip support for any partial features now -- 2.43.0
