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| author | Alexei Starovoitov <ast@kernel.org> | 2023-04-04 07:50:28 +0300 |
|---|---|---|
| committer | Andrii Nakryiko <andrii@kernel.org> | 2023-04-05 02:57:24 +0300 |
| commit | afeebf9f57a4965e0be90e4dc87f8f3a1417376d (patch) | |
| tree | 679061f4657f58b3e59255e932f081f25d4018d5 /tools/perf/scripts/python/flamegraph.py | |
| parent | 30ee9821f9430c34a6254134a5f0e8db227510be (diff) | |
| download | linux-afeebf9f57a4965e0be90e4dc87f8f3a1417376d.tar.xz | |
bpf: Undo strict enforcement for walking untagged fields.
The commit 6fcd486b3a0a ("bpf: Refactor RCU enforcement in the verifier.")
broke several tracing bpf programs. Even in clang compiled kernels there are
many fields that are not marked with __rcu that are safe to read and pass into
helpers, but the verifier doesn't know that they're safe. Aggressively marking
them as PTR_UNTRUSTED was premature.
Fixes: 6fcd486b3a0a ("bpf: Refactor RCU enforcement in the verifier.")
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: David Vernet <void@manifault.com>
Link: https://lore.kernel.org/bpf/20230404045029.82870-8-alexei.starovoitov@gmail.com
Diffstat (limited to 'tools/perf/scripts/python/flamegraph.py')
0 files changed, 0 insertions, 0 deletions