Re: [PATCH bpf] bpf: fix precision tracking in presence of bpf2bpf calls

2019-08-23 Thread Daniel Borkmann
On 8/21/19 11:07 PM, Alexei Starovoitov wrote: While adding extra tests for precision tracking and extra infra to adjust verifier heuristics the existing test "calls: cross frame pruning - liveness propagation" started to fail. The root cause is the same as described in verifer.c comment: * Al

[PATCH bpf] bpf: fix precision tracking in presence of bpf2bpf calls

2019-08-21 Thread Alexei Starovoitov
While adding extra tests for precision tracking and extra infra to adjust verifier heuristics the existing test "calls: cross frame pruning - liveness propagation" started to fail. The root cause is the same as described in verifer.c comment: * Also if parent's curframe > frame where backtracking