diff options
| author | Taras Kondratiuk <[email protected]> | 2018-03-09 08:34:41 +0000 |
|---|---|---|
| committer | Tejun Heo <[email protected]> | 2018-03-13 13:29:10 -0700 |
| commit | 2623c7a5f2799569d8bb05eb211da524a8144cb3 (patch) | |
| tree | 7ff753d1e024524a77fef933c149f1d96627ebff /lib/test_overflow.c | |
| parent | a80ea4cb944efc38e490a172e7afe635b2800db3 (diff) | |
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 <[email protected]>
Cc: Lin Ming <[email protected]>
Cc: [email protected]
Cc: [email protected]
Signed-off-by: Taras Kondratiuk <[email protected]>
Signed-off-by: Tejun Heo <[email protected]>
Diffstat (limited to 'lib/test_overflow.c')
0 files changed, 0 insertions, 0 deletions