mbox series

[net,0/3] skb frag: kmap_atomic fixes

Message ID 20210108171152.2961251-1-willemdebruijn.kernel@gmail.com
Headers show
Series skb frag: kmap_atomic fixes | expand

Message

Willem de Bruijn Jan. 8, 2021, 5:11 p.m. UTC 
From: Willem de Bruijn <willemb@google.com>

skb frags may be backed by highmem and/or compound pages. Various
code calls kmap_atomic to safely access highmem pages. But this
needs additional care for compound pages. Fix a few issues:

patch 1 expect kmap mappings with CONFIG_DEBUG_KMAP_LOCAL_FORCE_MAP
patch 2 fixes kmap_atomic + compound page support in skb_seq_read
patch 3 fixes kmap_atomic + compound page support in esp

Willem de Bruijn (3):
  net: support kmap_local forced debugging in skb_frag_foreach
  net: compound page support in skb_seq_read
  esp: avoid unneeded kmap_atomic call

 include/linux/skbuff.h |  3 ++-
 net/core/skbuff.c      | 28 +++++++++++++++++++++++-----
 net/ipv4/esp4.c        |  7 +------
 net/ipv6/esp6.c        |  7 +------
 4 files changed, 27 insertions(+), 18 deletions(-)