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authorTaras Kondratiuk <takondra@cisco.com>2018-03-09 09:34:41 +0100
committerTejun Heo <tj@kernel.org>2018-03-13 21:29:10 +0100
commit2623c7a5f2799569d8bb05eb211da524a8144cb3 (patch)
tree7ff753d1e024524a77fef933c149f1d96627ebff /include/sound
parentpata_bk3710: clarify license version and use SPDX header (diff)
downloadlinux-2623c7a5f2799569d8bb05eb211da524a8144cb3.tar.xz
linux-2623c7a5f2799569d8bb05eb211da524a8144cb3.zip
libata: add refcounting to ata_host
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 <tj@kernel.org> Cc: Lin Ming <minggr@gmail.com> Cc: linux-ide@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Taras Kondratiuk <takondra@cisco.com> Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'include/sound')
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