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| author |   Gianluca Borello <g.borello@gmail.com> | 2016-12-03 12:31:33 -0800 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2016-12-05 13:40:05 -0500 |
| commit | 3c839744b33782b930c5c61df35511ede5e5a574 (patch) | |
| tree | 950a0b8dd43c23f87e636bacd3074a5076818d93 /tools/testing/selftests/bpf/.gitignore | |
| parent | r8169: Add support for restarting auto-negotiation (diff) | |
| download | linux-dev-3c839744b33782b930c5c61df35511ede5e5a574.tar.xz linux-dev-3c839744b33782b930c5c61df35511ede5e5a574.zip | |
bpf: Preserve const register type on const OR alu ops
Occasionally, clang (e.g. version 3.8.1) translates a sum between two
constant operands using a BPF_OR instead of a BPF_ADD. The verifier is
currently not handling this scenario, and the destination register type
becomes UNKNOWN_VALUE even if it's still storing a constant. As a result,
the destination register cannot be used as argument to a helper function
expecting a ARG_CONST_STACK_*, limiting some use cases.
Modify the verifier to handle this case, and add a few tests to make sure
all combinations are supported, and stack boundaries are still verified
even with BPF_OR.
Signed-off-by: Gianluca Borello <g.borello@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'tools/testing/selftests/bpf/.gitignore')
| -rw-r--r-- | tools/testing/selftests/bpf/.gitignore | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/.gitignore b/tools/testing/selftests/bpf/.gitignore index 3c59f96e3ed8..071431bedde8 100644 --- a/tools/testing/selftests/bpf/.gitignore +++ b/tools/testing/selftests/bpf/.gitignore @@ -1,2 +1,3 @@ test_verifier test_maps +test_lru_map |