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netlink: fix state reallocation in policy export 

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: d07dcf9aad ("netlink: add infrastructure to expose policies to userspace")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Johannes Berg 2020-08-19 21:52:38 +02:00 committed by David S. Miller
parent b4c8998be2
commit d1fb555929
1 changed files with 3 additions and 0 deletions
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3
net/netlink/policy.c
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@ -51,6 +51,9 @@ static int add_policy(struct nl_policy_dump **statep,
if (!state)
return -ENOMEM;
memset(&state->policies[state->n_alloc], 0,
flex_array_size(state, policies, n_alloc - state->n_alloc));
state->policies[state->n_alloc].policy = policy;
state->policies[state->n_alloc].maxtype = maxtype;
state->n_alloc = n_alloc;