net: core: use helper skb_ensure_writable in more places (8211fbfa) · Commits · 戴 / test

net/core/dev.c

+8 −12

Original line number	Diff line number	Diff line
		@@ -3165,12 +3165,9 @@ int skb_checksum_help(struct sk_buff *skb)
		offset += skb->csum_offset;
		BUG_ON(offset + sizeof(__sum16) > skb_headlen(skb));

		if (skb_cloned(skb) &&
		!skb_clone_writable(skb, offset + sizeof(__sum16))) {
		ret = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
		ret = skb_ensure_writable(skb, offset + sizeof(__sum16));
		if (ret)
		goto out;
		}

		(__sum16 )(skb->data + offset) = csum_fold(csum) ?: CSUM_MANGLED_0;
		out_set_summed:
		@@ -3205,12 +3202,11 @@ int skb_crc32c_csum_help(struct sk_buff *skb)
		ret = -EINVAL;
		goto out;
		}
		if (skb_cloned(skb) &&
		!skb_clone_writable(skb, offset + sizeof(__le32))) {
		ret = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);

		ret = skb_ensure_writable(skb, offset + sizeof(__le32));
		if (ret)
		goto out;
		}

		crc32c_csum = cpu_to_le32(~__skb_checksum(skb, start,
		skb->len - start, ~(__u32)0,
		crc32c_csum_stub));