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| author | Xin Long <lucien.xin@gmail.com> | 2019-03-08 15:49:16 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-03-19 13:11:53 +0100 |
| commit | eb93e070a3094978eb7f9bb6f0606357d4f5474d (patch) | |
| tree | ff7cea1d883924147006c452e41e7e1603b5f005 | |
| parent | e9e1fd85ff2719cc5be64c2b6caba1466631b670 (diff) | |
| download | linux-stable-eb93e070a3094978eb7f9bb6f0606357d4f5474d.tar.gz linux-stable-eb93e070a3094978eb7f9bb6f0606357d4f5474d.tar.bz2 linux-stable-eb93e070a3094978eb7f9bb6f0606357d4f5474d.zip | |
sctp: remove sched init from sctp_stream_init
[ Upstream commit 2e990dfd13974d9eae493006f42ffb48707970ef ]
syzbot reported a NULL-ptr deref caused by that sched->init() in
sctp_stream_init() set stream->rr_next = NULL.
kasan: GPF could be caused by NULL-ptr deref or user memory access
RIP: 0010:sctp_sched_rr_dequeue+0xd3/0x170 net/sctp/stream_sched_rr.c:141
Call Trace:
sctp_outq_dequeue_data net/sctp/outqueue.c:90 [inline]
sctp_outq_flush_data net/sctp/outqueue.c:1079 [inline]
sctp_outq_flush+0xba2/0x2790 net/sctp/outqueue.c:1205
All sched info is saved in sout->ext now, in sctp_stream_init()
sctp_stream_alloc_out() will not change it, there's no need to
call sched->init() again, since sctp_outq_init() has already
done it.
Fixes: 5bbbbe32a431 ("sctp: introduce stream scheduler foundations")
Reported-by: syzbot+4c9934f20522c0efd657@syzkaller.appspotmail.com
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Neil Horman <nhorman@tuxdriver.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>
| -rw-r--r-- | net/sctp/stream.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/net/sctp/stream.c b/net/sctp/stream.c index 2936ed17bf9e..3b47457862cc 100644 --- a/net/sctp/stream.c +++ b/net/sctp/stream.c @@ -230,8 +230,6 @@ int sctp_stream_init(struct sctp_stream *stream, __u16 outcnt, __u16 incnt, for (i = 0; i < stream->outcnt; i++) SCTP_SO(stream, i)->state = SCTP_STREAM_OPEN; - sched->init(stream); - in: sctp_stream_interleave_init(stream); if (!incnt) |