From ddb4b9a1328ea89733133e86cf1972d23891abfc Mon Sep 17 00:00:00 2001 From: Alexander Duyck Date: Tue, 10 Mar 2015 14:39:34 -0700 Subject: [PATCH] fib_trie: Address possible NULL pointer dereference in resize If the inflate call failed it would return NULL. As a result tp would be set to NULL and cause use to trigger a NULL pointer dereference in should_halve if the inflate failed on the first attempt. In order to prevent this we should decrement max_work before we actually attempt to inflate as this will force us to exit before attempting to halve a node we should have inflated. In order to keep things symmetric between inflate and halve I went ahead and also moved the decrement of max_work for the halve case as well so we take care of that before we actually attempt to halve the tnode. Fixes: 88bae714 ("fib_trie: Add key vector to root, return parent key_vector in resize") Reported-by: Dan Carpenter Signed-off-by: Alexander Duyck Signed-off-by: David S. Miller --- Reading git-format-patch failed