Merge branch 'fix-bpf-multi-uprobe-pid-filtering-logic'

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Andrii Nakryiko says:

====================
Fix BPF multi-uprobe PID filtering logic

It turns out that current implementation of multi-uprobe PID filtering logic
is broken. It filters by thread, while the promise is filtering by process.
Patch #1 fixes the logic trivially. The rest is testing and mitigations that
are necessary for libbpf to not break users of USDT programs.

v1->v2:
  - fix selftest in last patch (CI);
  - use semicolon in patch #3 (Jiri).
====================

Link: https://lore.kernel.org/r/20240521163401.3005045-1-andrii@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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Alexei Starovoitov 2024-05-25 10:46:03 -07:00

parent 44382b3ed6 198034a87d

commit 590016ad83

4 changed files with 206 additions and 19 deletions

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10

kernel/trace/bpf_trace.c

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31

tools/lib/bpf/features.c

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134

tools/testing/selftests/bpf/prog_tests/uprobe_multi_test.c

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50

tools/testing/selftests/bpf/progs/uprobe_multi.c

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