diff options
| author | Toke Høiland-Jørgensen <toke@redhat.com> | 2020-04-16 10:31:20 +0200 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2020-04-20 18:38:04 -0700 |
| commit | bc23d0e3f717ced21fbfacab3ab887d55e5ba367 (patch) | |
| tree | d9b55b22a3c6429936b2b7d5d5b3b6b129845a1b /crypto/vmac.c | |
| parent | a460fc5d4c170806a31e590df37ead3ab951315c (diff) | |
cpumap: Avoid warning when CONFIG_DEBUG_PER_CPU_MAPS is enabled
When the kernel is built with CONFIG_DEBUG_PER_CPU_MAPS, the cpumap code
can trigger a spurious warning if CONFIG_CPUMASK_OFFSTACK is also set. This
happens because in this configuration, NR_CPUS can be larger than
nr_cpumask_bits, so the initial check in cpu_map_alloc() is not sufficient
to guard against hitting the warning in cpumask_check().
Fix this by explicitly checking the supplied key against the
nr_cpumask_bits variable before calling cpu_possible().
Fixes: 6710e1126934 ("bpf: introduce new bpf cpu map type BPF_MAP_TYPE_CPUMAP")
Reported-by: Xiumei Mu <xmu@redhat.com>
Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Tested-by: Xiumei Mu <xmu@redhat.com>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: Song Liu <songliubraving@fb.com>
Link: https://lore.kernel.org/bpf/20200416083120.453718-1-toke@redhat.com
Diffstat (limited to 'crypto/vmac.c')
0 files changed, 0 insertions, 0 deletions