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net, netrom: convert nr_node.refcount from atomic_t to refcount_t

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refcount_t type and corresponding API should be
used instead of atomic_t when the variable is used as
a reference counter. This allows to avoid accidental
refcounter overflows that might lead to use-after-free
situations.

Signed-off-by: Elena Reshetova <[email protected]>
Signed-off-by: Hans Liljestrand <[email protected]>
Signed-off-by: Kees Cook <[email protected]>
Signed-off-by: David Windsor <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Reshetova, Elena 2017-07-04 15:53:12 +03:00 • committed by David S. Miller
commit 156be7edc8
2 changed files with 4 additions and 4 deletions
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2
net/netrom/nr_route.c
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@ -184,7 +184,7 @@ static int __must_check nr_add_node(ax25_address *nr, const char *mnemonic,
nr_node->which = 0;
nr_node->count = 1;
atomic_set(&nr_node->refcount, 1);
refcount_set(&nr_node->refcount, 1);
spin_lock_init(&nr_node->node_lock);
nr_node->routes[0].quality = quality;