ip_gre: add validation for csum_start
[ Upstream commit 1d011c48 ] Validate csum_start in gre_handle_offloads before we call _gre_xmit so that we do not crash later when the csum_start value is used in the lco_csum function call. This patch deals with ipv4 code. Fixes: c5441932 ("GRE: Refactor GRE tunneling code.") Reported-by:<syzbot+ff8e1b9f2f36481e2efc@syzkaller.appspotmail.com> Signed-off-by:
Shreyansh Chouhan <chouhan.shreyansh630@gmail.com> Reviewed-by:
Willem de Bruijn <willemb@google.com> Signed-off-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
Sasha Levin <sashal@kernel.org>
parent
4c00ae66
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