Commit 00ffc1ba authored Nov 03, 2016 by WANG Cong Committed by David S. Miller Nov 03, 2016

genetlink: fix a memory leak on error path



In __genl_register_family(), when genl_validate_assign_mc_groups()
fails, we forget to free the memory we possibly allocate for
family->attrbuf.

Note, some callers call genl_unregister_family() to clean up
on error path, it doesn't work because the family is inserted
to the global list in the nearly last step.

Cc: Jakub Kicinski <kubakici@wp.pl>
Cc: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 990ff4d8

net/netlink/genetlink.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -404,7 +404,7 @@ int __genl_register_family(struct genl_family *family)

		err = genl_validate_assign_mc_groups(family);
		if (err)
		goto errout_locked;
		goto errout_free;

		list_add_tail(&family->family_list, genl_family_chain(family->id));
		genl_unlock_all();
		@@ -417,6 +417,8 @@ int __genl_register_family(struct genl_family *family)

		return 0;

		errout_free:
		kfree(family->attrbuf);
		errout_locked:
		genl_unlock_all();
		errout: