On Wed, 19 Aug 2020 12:22:55 +0200 Johannes Berg wrote:
> From: Johannes Berg <johannes.b...@intel.com>
>
> Evidently, when I did this previously, we didn't have more than
> 10 policies and didn't run into the reallocation path, because
> it's missing a memset() for the unused policies. Fix that.
>
> Fixes: d07dcf9aadd6 ("netlink: add infrastructure to expose policies to
> userspace")
> Signed-off-by: Johannes Berg <johannes.b...@intel.com>
> ---
> net/netlink/policy.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/net/netlink/policy.c b/net/netlink/policy.c
> index f6491853c797..3f3b421fd70c 100644
> --- a/net/netlink/policy.c
> +++ b/net/netlink/policy.c
> @@ -51,6 +51,9 @@ static int add_policy(struct nl_policy_dump **statep,
> if (!state)
> return -ENOMEM;
>
> + memset(&state->policies[state->n_alloc], 0,
> + sizeof(state->policies[0]) * (n_alloc - state->n_alloc));
[flex_]array_size() ? To avoid the inevitable follow up from a bot..
