On Wed, Aug 16, 2017 at 4:19 PM, Eric Dumazet <eric.duma...@gmail.com> wrote:
> From: Eric Dumazet <eduma...@google.com>
>
> 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: Eric Dumazet <eduma...@google.com>
> ---
> v2: fix a missing change in net/ipv4/fib_semantics.c
>
> include/net/dst.h | 2 +-
> net/core/dst.c | 6 +++---
> net/ipv4/fib_semantics.c | 4 ++--
> net/ipv4/route.c | 4 ++--
> 4 files changed, 8 insertions(+), 8 deletions(-)
>
> diff --git a/include/net/dst.h b/include/net/dst.h
> index
> f73611ec401754d4f52b5310a24da53566dafce6..dd38177c3a61f5c4e48be9d57d4d10d6b7d14672
> 100644
> --- a/include/net/dst.h
> +++ b/include/net/dst.h
> @@ -107,7 +107,7 @@ struct dst_entry {
>
> struct dst_metrics {
> u32 metrics[RTAX_MAX];
> - atomic_t refcnt;
> + refcount_t refcnt;
> };
> extern const struct dst_metrics dst_default_metrics;
#include linux/refcount.h explicitly?
