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net, ipx: convert ipx_route.refcnt 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 15:53:10 +03:00 • committed by David S. Miller
commit 16f73c9649
2 changed files with 4 additions and 4 deletions
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2
net/ipx/ipx_route.c
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@ -59,7 +59,7 @@ int ipxrtr_add_route(__be32 network, struct ipx_interface *intrfc,
if (!rt)
goto out;
atomic_set(&rt->refcnt, 1);
refcount_set(&rt->refcnt, 1);
ipxrtr_hold(rt);
write_lock_bh(&ipx_routes_lock);
list_add(&rt->node, &ipx_routes);