[PATCH net-next 0/2] net: pull gso packet headers in core stack

[Eric Dumazet <edumazet@google.com>]

Most ndo_start_xmit() methods expects headers of gso packets
to be already in skb->head.

net/core/tso.c users are particularly at risk, because tso_build_hdr()
does a memcpy(hdr, skb->data, hdr_len);

qdisc_pkt_len_segs_init() already does a dissection of gso packets.

Use pskb_may_pull() instead of skb_header_pointer() to make
sure drivers do not have to reimplement this.

First patch is a small cleanup to ease second patch review.

Eric Dumazet (2):
  net: qdisc_pkt_len_segs_init() cleanup
  net: pull headers in qdisc_pkt_len_segs_init()

 include/net/dropreason-core.h |  3 ++
 net/core/dev.c                | 81 ++++++++++++++++++++---------------
 2 files changed, 49 insertions(+), 35 deletions(-)

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2.53.0.1213.gd9a14994de-goog