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net, sctp: convert sctp_transport.refcnt 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 <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>
This commit is contained in:
Reshetova, Elena 2017-07-04 15:53:27 +03:00 • committed by David S. Miller
commit a4b2b58efd
2 changed files with 5 additions and 5 deletions
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2
include/net/sctp/structs.h
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@ -735,7 +735,7 @@ struct sctp_transport {
struct rhlist_head node;
/* Reference counting. */
atomic_t refcnt;
refcount_t refcnt;
/* RTO-Pending : A flag used to track if one of the DATA
* chunks sent to this address is currently being
* used to compute a RTT. If this flag is 0,