net, sctp: convert sctp_chunk.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: 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>
diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h
index 4d7c855..0dfc5c1 100644
--- a/include/net/sctp/structs.h
+++ b/include/net/sctp/structs.h
@@ -524,7 +524,7 @@ int sctp_chunk_abandoned(struct sctp_chunk *);
struct sctp_chunk {
struct list_head list;
- atomic_t refcnt;
+ refcount_t refcnt;
/* How many times this chunk have been sent, for prsctp RTX policy */
int sent_count;