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netlink: fix policy dump leak

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If userspace doesn't complete the policy dump, we leak the
allocated state. Fix this.

Fixes: d07dcf9aad ("netlink: add infrastructure to expose policies to userspace")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Johannes Berg
2020-10-02 09:46:04 +02:00
committed by David S. Miller
parent ef9da46dde
commit a95bc734e6
3 changed files with 20 additions and 16 deletions
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3
include/net/netlink.h
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@@ -1934,7 +1934,8 @@ void nla_get_range_signed(const struct nla_policy *pt,
int netlink_policy_dump_start(const struct nla_policy *policy,
unsigned int maxtype,
unsigned long *state);
bool netlink_policy_dump_loop(unsigned long *state);
bool netlink_policy_dump_loop(unsigned long state);
int netlink_policy_dump_write(struct sk_buff *skb, unsigned long state);
void netlink_policy_dump_free(unsigned long state);
#endif