net: add kmemcheck annotation in __alloc_skb()
pskb_expand_head() triggers a kmemcheck warning when copy of skb_shared_info is done in pskb_expand_head() This is because destructor_arg field is not necessarily initialized at this point. Add kmemcheck_annotate_variable() call in __alloc_skb() to instruct kmemcheck this is a normal situation. Resolves bugzilla.kernel.org 27212 Reference: https://bugzilla.kernel.org/show_bug.cgi?id=27212 Reported-by: Christian Casteyde <casteyde.christian@free.fr> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> CC: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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committad av
David S. Miller

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6d3a9a6854
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c2aa3665cf
@@ -210,6 +210,7 @@ struct sk_buff *__alloc_skb(unsigned int size, gfp_t gfp_mask,
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shinfo = skb_shinfo(skb);
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shinfo = skb_shinfo(skb);
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memset(shinfo, 0, offsetof(struct skb_shared_info, dataref));
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memset(shinfo, 0, offsetof(struct skb_shared_info, dataref));
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atomic_set(&shinfo->dataref, 1);
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atomic_set(&shinfo->dataref, 1);
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kmemcheck_annotate_variable(shinfo->destructor_arg);
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if (fclone) {
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if (fclone) {
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struct sk_buff *child = skb + 1;
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struct sk_buff *child = skb + 1;
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