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authorEric Dumazet <edumazet@google.com>2022-02-01 07:52:54 +0100
committerJakub Kicinski <kuba@kernel.org>2022-02-02 05:21:40 +0100
commit479f5547239d970d3833f15f54a6481fffdb91ec (patch)
tree524d5d9fedeea8d2594e0b7bdb9f524da541143a /crypto
parentaf_packet: fix data-race in packet_setsockopt / packet_setsockopt (diff)
downloadlinux-479f5547239d970d3833f15f54a6481fffdb91ec.tar.xz
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tcp: fix mem under-charging with zerocopy sendmsg()
We got reports of following warning in inet_sock_destruct() WARN_ON(sk_forward_alloc_get(sk)); Whenever we add a non zero-copy fragment to a pure zerocopy skb, we have to anticipate that whole skb->truesize will be uncharged when skb is finally freed. skb->data_len is the payload length. But the memory truesize estimated by __zerocopy_sg_from_iter() is page aligned. Fixes: 9b65b17db723 ("net: avoid double accounting for pure zerocopy skbs") Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Talal Ahmad <talalahmad@google.com> Cc: Arjun Roy <arjunroy@google.com> Cc: Willem de Bruijn <willemb@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Link: https://lore.kernel.org/r/20220201065254.680532-1-eric.dumazet@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'crypto')
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