[PATCH net-next] netlink: don't forget to release a rhashtable_iter structure

This bug was detected by kmemleak:
unreferenced object 0xffff8804269cc3c0 (size 64):
  comm "criu", pid 1042, jiffies 4294907360 (age 13.713s)
  hex dump (first 32 bytes):
    a0 32 cc 2c 04 88 ff ff 00 00 00 00 00 00 00 00  .2.,............
    00 01 00 00 00 00 ad de 00 02 00 00 00 00 ad de  ................
  backtrace:
    [<ffffffff8184dffa>] kmemleak_alloc+0x4a/0xa0
    [<ffffffff8124720f>] kmem_cache_alloc_trace+0x10f/0x280
    [<ffffffffa02864cc>] __netlink_diag_dump+0x26c/0x290 [netlink_diag]

Cc: Herbert Xu <herbert@gondor.apana.org.au>
Fixes: ad202074320c ("netlink: Use rhashtable walk interface in diag dump")
Signed-off-by: Andrei Vagin <redacted>
---
 net/netlink/diag.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/netlink/diag.c b/net/netlink/diag.c
index 3e3e253..951670c 100644
--- a/net/netlink/diag.c
+++ b/net/netlink/diag.c

@@ -127,6 +127,7 @@ stop:
 		goto done;
 
 	rhashtable_walk_exit(hti);
+	kfree(hti);
 	cb->args[2] = 0;
 	num++;
 

-- 
2.5.5