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| author | Xin Long <lucien.xin@gmail.com> | 2016-12-15 15:05:52 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-01-15 12:42:52 (GMT) |
| commit | ed3cc329c7bc82c0f29735d81b26f96287dbe08a (patch) | |
| tree | 01c690784cb645dbe400a5f8c3584e623836cf5c /net/sctp | |
| parent | 8b8fbe5c25abcdc93fcb91c896c40452ca9789a3 (diff) | |
| download | linux-ed3cc329c7bc82c0f29735d81b26f96287dbe08a.tar.xz | |
sctp: sctp_transport_lookup_process should rcu_read_unlock when transport is null
[ Upstream commit 08abb79542c9e8c367d1d8e44fe1026868d3f0a7 ]
Prior to this patch, sctp_transport_lookup_process didn't rcu_read_unlock
when it failed to find a transport by sctp_addrs_lookup_transport.
This patch is to fix it by moving up rcu_read_unlock right before checking
transport and also to remove the out path.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/sctp')
| -rw-r--r-- | net/sctp/socket.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/net/sctp/socket.c b/net/sctp/socket.c index f23ad91..ca12aa3 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -4479,9 +4479,10 @@ int sctp_transport_lookup_process(int (*cb)(struct sctp_transport *, void *), rcu_read_lock(); transport = sctp_addrs_lookup_transport(net, laddr, paddr); - if (!transport || !sctp_transport_hold(transport)) + if (!transport || !sctp_transport_hold(transport)) { + rcu_read_unlock(); goto out; - + } rcu_read_unlock(); err = cb(transport, p); sctp_transport_put(transport); |