On Thu, Nov 7, 2019 at 10:42 PM Alexei Starovoitov <ast@xxxxxxxxxx> wrote:
>
> btf_resolve_helper_id() caching logic is a bit racy, since under root the
> verifier can verify several programs in parallel. Fix it with READ/WRITE_ONCE.
> Fix the type as well, since error is also recorded.
>
> Fixes: a7658e1a4164 ("bpf: Check types of arguments passed into helpers")
> Signed-off-by: Alexei Starovoitov <ast@xxxxxxxxxx>
> ---
looks good
Acked-by: Andrii Nakryiko <andriin@xxxxxx>
> include/linux/bpf.h | 5 +++--
> kernel/bpf/btf.c | 26 +++++++++++++++++++++++++-
> kernel/bpf/verifier.c | 8 +++-----
> net/core/filter.c | 2 +-
> 4 files changed, 32 insertions(+), 9 deletions(-)
>
[...]
