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net, ax25: convert ax25_route.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 15:53:30 +03:00 • committed by David S. Miller
commit 39f25d42c0
2 changed files with 4 additions and 4 deletions
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2
net/ax25/ax25_route.c
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@ -114,7 +114,7 @@ static int __must_check ax25_rt_add(struct ax25_routes_struct *route)
return -ENOMEM;
}
atomic_set(&ax25_rt->refcount, 1);
refcount_set(&ax25_rt->refcount, 1);
ax25_rt->callsign = route->dest_addr;
ax25_rt->dev = ax25_dev->dev;
ax25_rt->digipeat = NULL;