diff options
Diffstat (limited to 'target/linux/generic/patches-4.4/030-4-sr9700-use-skb_cow_head-to-deal-with-cloned-skbs.patch')
| -rw-r--r-- | target/linux/generic/patches-4.4/030-4-sr9700-use-skb_cow_head-to-deal-with-cloned-skbs.patch | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/target/linux/generic/patches-4.4/030-4-sr9700-use-skb_cow_head-to-deal-with-cloned-skbs.patch b/target/linux/generic/patches-4.4/030-4-sr9700-use-skb_cow_head-to-deal-with-cloned-skbs.patch new file mode 100644 index 0000000000..4d0fcf6fc2 --- /dev/null +++ b/target/linux/generic/patches-4.4/030-4-sr9700-use-skb_cow_head-to-deal-with-cloned-skbs.patch @@ -0,0 +1,37 @@ +From d532c1082f68176363ed766d09bf187616e282fe Mon Sep 17 00:00:00 2001 +From: Eric Dumazet <edumazet@google.com> +Date: Wed, 19 Apr 2017 09:59:23 -0700 +Subject: [PATCH] sr9700: use skb_cow_head() to deal with cloned skbs + +We need to ensure there is enough headroom to push extra header, +but we also need to check if we are allowed to change headers. + +skb_cow_head() is the proper helper to deal with this. + +Fixes: c9b37458e956 ("USB2NET : SR9700 : One chip USB 1.1 USB2NET SR9700Device Driver Support") +Signed-off-by: Eric Dumazet <edumazet@google.com> +Cc: James Hughes <james.hughes@raspberrypi.org> +Signed-off-by: David S. Miller <davem@davemloft.net> +--- + drivers/net/usb/sr9700.c | 9 ++------- + 1 file changed, 2 insertions(+), 7 deletions(-) + +--- a/drivers/net/usb/sr9700.c ++++ b/drivers/net/usb/sr9700.c +@@ -456,14 +456,9 @@ static struct sk_buff *sr9700_tx_fixup(s + + len = skb->len; + +- if (skb_headroom(skb) < SR_TX_OVERHEAD) { +- struct sk_buff *skb2; +- +- skb2 = skb_copy_expand(skb, SR_TX_OVERHEAD, 0, flags); ++ if (skb_cow_head(skb, SR_TX_OVERHEAD)) { + dev_kfree_skb_any(skb); +- skb = skb2; +- if (!skb) +- return NULL; ++ return NULL; + } + + __skb_push(skb, SR_TX_OVERHEAD); |