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authorEric Dumazet <edumazet@google.com>2017-08-18 12:08:07 -0700
committerDavid S. Miller <davem@davemloft.net>2017-08-18 15:14:07 -0700
commit9620fef27ed2cdb37bf6fd028f32bea2ef5119a8 (patch)
tree7d4b243d0f353b98fd379d0d6ad800d734506e30 /include
parent633cefe390e59e9449dc88707235e57ac76b5c38 (diff)
downloadlinux-stericsson-9620fef27ed2cdb37bf6fd028f32bea2ef5119a8.tar.gz
ipv4: convert dst_metrics.refcnt 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: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/net/dst.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/net/dst.h b/include/net/dst.h
index f73611ec4017..93568bd0a352 100644
--- a/include/net/dst.h
+++ b/include/net/dst.h
@@ -14,6 +14,7 @@
#include <linux/rcupdate.h>
#include <linux/bug.h>
#include <linux/jiffies.h>
+#include <linux/refcount.h>
#include <net/neighbour.h>
#include <asm/processor.h>
@@ -107,7 +108,7 @@ struct dst_entry {
struct dst_metrics {
u32 metrics[RTAX_MAX];
- atomic_t refcnt;
+ refcount_t refcnt;
};
extern const struct dst_metrics dst_default_metrics;