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| author | Reshetova, Elena <elena.reshetova@intel.com> | 2017-07-04 15:53:00 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-07-04 22:35:15 +0100 |
| commit | e0542dd5185e68247b08c3418bdba14644b4c414 (patch) | |
| tree | 1e887d070c0b3a07bff7a829bc7e78a929a49574 /include | |
| parent | 66af846fe54b780f8f5bd9a62aee081bd2ace582 (diff) | |
| download | linux-e0542dd5185e68247b08c3418bdba14644b4c414.tar.gz linux-e0542dd5185e68247b08c3418bdba14644b4c414.tar.bz2 linux-e0542dd5185e68247b08c3418bdba14644b4c414.zip | |
net, decnet: convert dn_fib_info.fib_clntref from atomic_t to refcount_t
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>
Diffstat (limited to 'include')
| -rw-r--r-- | include/net/dn_fib.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/include/net/dn_fib.h b/include/net/dn_fib.h index f2ca135ddcc9..81210a8b8d7c 100644 --- a/include/net/dn_fib.h +++ b/include/net/dn_fib.h @@ -2,6 +2,7 @@ #define _NET_DN_FIB_H #include <linux/netlink.h> +#include <linux/refcount.h> extern const struct nla_policy rtm_dn_policy[]; @@ -28,7 +29,7 @@ struct dn_fib_info { struct dn_fib_info *fib_next; struct dn_fib_info *fib_prev; int fib_treeref; - atomic_t fib_clntref; + refcount_t fib_clntref; int fib_dead; unsigned int fib_flags; int fib_protocol; @@ -130,7 +131,7 @@ void dn_fib_free_info(struct dn_fib_info *fi); static inline void dn_fib_info_put(struct dn_fib_info *fi) { - if (atomic_dec_and_test(&fi->fib_clntref)) + if (refcount_dec_and_test(&fi->fib_clntref)) dn_fib_free_info(fi); } |