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net, atm: convert atm_dev.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 <elena.reshetova@intel.com>
Signed-off-by: Hans Liljestrand <ishkamiel@gmail.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: David Windsor <dwindsor@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Reshetova, Elena
2017-07-04 15:53:01 +03:00
committed by David S. Miller
parent e0542dd518
commit 458bc30cec
3 changed files with 6 additions and 5 deletions
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2
net/atm/resources.c
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@@ -109,7 +109,7 @@ struct atm_dev *atm_dev_register(const char *type, struct device *parent,
else
memset(&dev->flags, 0, sizeof(dev->flags));
memset(&dev->stats, 0, sizeof(dev->stats));
atomic_set(&dev->refcnt, 1);
refcount_set(&dev->refcnt, 1);
if (atm_proc_dev_register(dev) < 0) {
pr_err("atm_proc_dev_register failed for dev %s\n", type);