From: Leon Romanovsky <leonro@mellanox.com>
Date: Mon, 19 Mar 2018 12:20:15 +0000 (+0200)
Subject: RDMA/ucma: Fix use-after-free access in ucma_close
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e78759ba4d27ab2f19b285f666887bf4d00b7514;p=pandora-kernel.git

RDMA/ucma: Fix use-after-free access in ucma_close

commit ed65a4dc22083e73bac599ded6a262318cad7baf upstream.

The error in ucma_create_id() left ctx in the list of contexts belong
to ucma file descriptor. The attempt to close this file descriptor causes
to use-after-free accesses while iterating over such list.

Fixes: 75216638572f ("RDMA/cma: Export rdma cm interface to userspace")
Reported-by: <syzbot+dcfd344365a56fbebd0f@syzkaller.appspotmail.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Reviewed-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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