net/sched: flower: fix possible OOB write in fl_set_geneve_opt()
[ Upstream commit 4d56304e ] If we send two TCA_FLOWER_KEY_ENC_OPTS_GENEVE packets and their total size is 252 bytes(key->enc_opts.len = 252) then key->enc_opts.len = opt->length = data_len / 4 = 0 when the third TCA_FLOWER_KEY_ENC_OPTS_GENEVE packet enters fl_set_geneve_opt. This bypasses the next bounds check and results in an out-of-bounds. Fixes: 0a6e7778 ("net/sched: allow flower to match tunnel options") Signed-off-by:Hangyu Hua <hbh25y@gmail.com> Reviewed-by:
Simon Horman <simon.horman@corigine.com> Reviewed-by:
Pieter Jansen van Vuuren <pieter.jansen-van-vuuren@amd.com> Link: https://lore.kernel.org/r/20230531102805.27090-1-hbh25y@gmail.com Signed-off-by:
Paolo Abeni <pabeni@redhat.com> Signed-off-by:
Sasha Levin <sashal@kernel.org>
parent
dd4b5a20
Please register or sign in to comment