bpf: try harder on clones when writing into skb

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[ Upstream commit 3697649ff2 ]

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Daniel Borkmann 2016-02-19 23:05:25 +01:00 • committed by Greg Kroah-Hartman

parent 999e0d1878

commit b30cc5b14f

4 changed files with 24 additions and 27 deletions

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include/linux/skbuff.h

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