4.16-stable review patch. If anyone has any objections, please let me know.
------------------ From: Xin Long <[email protected]> [ Upstream commit 6a9a27d5397fc6c52f90c09ddab91e65053584aa ] When processing a duplicate cookie-echo chunk, sctp moves the new temp asoc's stream out/in into the old asoc, and later frees this new temp asoc. But now after this move, the new temp asoc's stream->outcnt is not cleared while stream->out is set to NULL, which would cause a same crash as the one fixed in Commit 79d0895140e9 ("sctp: fix error path in sctp_stream_init") when freeing this asoc later. This fix is to clear this outcnt in sctp_stream_update. Fixes: f952be79cebd ("sctp: introduce struct sctp_stream_out_ext") Reported-by: Jianwen Ji <[email protected]> Signed-off-by: Xin Long <[email protected]> Acked-by: Neil Horman <[email protected]> Acked-by: Marcelo Ricardo Leitner <[email protected]> Signed-off-by: David S. Miller <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- net/sctp/stream.c | 2 ++ 1 file changed, 2 insertions(+) --- a/net/sctp/stream.c +++ b/net/sctp/stream.c @@ -240,6 +240,8 @@ void sctp_stream_update(struct sctp_stre new->out = NULL; new->in = NULL; + new->outcnt = 0; + new->incnt = 0; } static int sctp_send_reconf(struct sctp_association *asoc,
