bpf: try harder on clones when writing into skb
authorDaniel Borkmann <daniel@iogearbox.net>
Fri, 19 Feb 2016 22:05:25 +0000 (23:05 +0100)
committerDavid S. Miller <davem@davemloft.net>
Mon, 22 Feb 2016 03:07:10 +0000 (22:07 -0500)
commit3697649ff29e0f647565eed04b27a7779c646a22
treef6777555e1879ba3af5cb96673f3674bb72ca7c0
parent21cafc1dc2da999dabc5ed7aa94230454471fcf0
bpf: try harder on clones when writing into skb

When we're dealing with clones and the area is not writeable, try
harder and get a copy via pskb_expand_head(). Replace also other
occurences in tc actions with the new skb_try_make_writable().

Reported-by: Ashhad Sheikh <ashhadsheikh394@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
include/linux/skbuff.h
net/core/filter.c
net/sched/act_csum.c
net/sched/act_nat.c