On Fri, Mar 09, 2018 at 08:34:41AM +0000, Taras Kondratiuk wrote: > After commit 9a6d6a2ddabb ("ata: make ata port as parent device of scsi > host") manual driver unbind/remove causes use-after-free. > > Unbind unconditionally invokes devres_release_all() which calls > ata_host_release() and frees ata_host/ata_port memory while it is still > being referenced as a parent of SCSI host. When SCSI host is finally > released scsi_host_dev_release() calls put_device(parent) and accesses > freed ata_port memory. > > Add reference counting to make sure that ata_host lives long enough. > > Bug report: https://lkml.org/lkml/2017/11/1/945 > Fixes: 9a6d6a2ddabb ("ata: make ata port as parent device of scsi host") > Cc: Tejun Heo <t...@kernel.org> > Cc: Lin Ming <min...@gmail.com> > Cc: linux-...@vger.kernel.org > Cc: linux-kernel@vger.kernel.org > Signed-off-by: Taras Kondratiuk <takon...@cisco.com>
Applied to libata/for-4.17. Thanks. -- tejun