selftests/bpf: Add UAF tests for arena atomics

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Check that __sync_*() functions don't cause kernel panics when handling
freed arena pages.

x86_64 does not support some arena atomics yet, and aarch64 may or may
not support them, based on the availability of LSE atomics at run time.
Do not enable this test for these architectures for simplicity.

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20240701234304.14336-12-iii@linux.ibm.com

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Ilya Leoshkevich 2024-07-02 01:40:29 +02:00 • committed by Daniel Borkmann

parent b6349fd344

commit 490c99d4ed

2 changed files with 94 additions and 0 deletions

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18

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

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

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