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ila_xlat_nl_cmd_flush uses rhashtable walkers allocated from the
stack but it never frees them. This corrupts the walker list of
the hash table.
This patch fixes it.
Reported-by: syzbot+dae72a112334aa65a159@syzkaller.appspotmail.com
Fixes: b6e71bdebb ("ila: Flush netlink command to clear xlat...")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>