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| author | Xin Long <lucien.xin@gmail.com> | 2016-10-31 20:32:31 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-10-31 16:20:32 -0400 |
| commit | cd26da4ff4eb7189921d4e7ad87e8adebb7b416b (patch) | |
| tree | 15e1db16d4528e66c85ede29ffc844cda7607aed | |
| parent | 87557efc27f6a50140fb20df06a917f368ce3c66 (diff) | |
| download | linux-cd26da4ff4eb7189921d4e7ad87e8adebb7b416b.tar.bz2 | |
sctp: hold transport instead of assoc in sctp_diag
In sctp_transport_lookup_process(), Commit 1cceda784980 ("sctp: fix
the issue sctp_diag uses lock_sock in rcu_read_lock") moved cb() out
of rcu lock, but it put transport and hold assoc instead, and ignore
that cb() still uses transport. It may cause a use-after-free issue.
This patch is to hold transport instead of assoc there.
Fixes: 1cceda784980 ("sctp: fix the issue sctp_diag uses lock_sock in rcu_read_lock")
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/sctp/socket.c | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/net/sctp/socket.c b/net/sctp/socket.c index 9fbb6feb8c27..71b75f9d9c1b 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -4480,12 +4480,9 @@ int sctp_transport_lookup_process(int (*cb)(struct sctp_transport *, void *), if (!transport || !sctp_transport_hold(transport)) goto out; - sctp_association_hold(transport->asoc); - sctp_transport_put(transport); - rcu_read_unlock(); err = cb(transport, p); - sctp_association_put(transport->asoc); + sctp_transport_put(transport); out: return err; |