path: root/Documentation/networking
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authorEdward Cree <ecree@solarflare.com>2017-08-23 15:10:50 +0100
committerDavid S. Miller <davem@davemloft.net>2017-08-23 22:38:08 -0700
commit1b688a19a92223cf2d1892c9d05d64dc397b33e3 (patch)
tree1e388805090774a172afdca917e657dad8b300ff /Documentation/networking
parentselftests/bpf: add a test for a pruning bug in the verifier (diff)
bpf/verifier: remove varlen_map_value_access flag
The optimisation it does is broken when the 'new' register value has a variable offset and the 'old' was constant. I broke it with my pointer types unification (see Fixes tag below), before which the 'new' value would have type PTR_TO_MAP_VALUE_ADJ and would thus not compare equal; other changes in that patch mean that its original behaviour (ignore min/max values) cannot be restored. Tests on a sample set of cilium programs show no change in count of processed instructions. Fixes: f1174f77b50c ("bpf/verifier: rework value tracking") Signed-off-by: Edward Cree <ecree@solarflare.com> Acked-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
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