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net, x25: convert x25_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 15:53:19 +03:00 • committed by David S. Miller
commit 5f9ccf6f38
2 changed files with 5 additions and 4 deletions
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2
net/x25/x25_route.c
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@ -55,7 +55,7 @@ static int x25_add_route(struct x25_address *address, unsigned int sigdigits,
rt->sigdigits = sigdigits;
rt->dev = dev;
atomic_set(&rt->refcnt, 1);
refcount_set(&rt->refcnt, 1);
list_add(&rt->node, &x25_route_list);
rc = 0;