Files
linux/tools/testing/selftests/bpf/prog_tests
Artem Savkov ebaf24c589 selftests/bpf: Use bpf_num_possible_cpus() in per-cpu map allocations
bpf_map_value_size() uses num_possible_cpus() to determine map size, but
some of the tests only allocate enough memory for online cpus. This
results in out-of-bound writes in userspace during bpf(BPF_MAP_LOOKUP_ELEM)
syscalls in cases when number of online cpus is lower than the number of
possible cpus. Fix by switching from get_nprocs_conf() to
bpf_num_possible_cpus() when determining the number of processors in
these tests (test_progs/netcnt and test_cgroup_storage).

Signed-off-by: Artem Savkov <asavkov@redhat.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20220406085408.339336-1-asavkov@redhat.com
2022-04-06 10:15:53 -07:00
..
2021-11-30 10:56:28 -08:00
2021-10-25 20:39:42 -07:00
2022-02-20 09:19:58 -08:00