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| author | Anatoliy Glagolev <glagolig@gmail.com> | 2018-06-13 15:38:51 -0600 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-06-15 08:15:37 -0600 |
| commit | d6c73964f1e2a07f75057fb32ae46f6599036f93 (patch) | |
| tree | 7e77c8a410880ad63db5b44303b7d6a3a472d95d /kernel | |
| parent | be7f99c536c5aeebad29082b7d8dce32077fea14 (diff) | |
| download | blackbird-obmc-linux-d6c73964f1e2a07f75057fb32ae46f6599036f93.tar.gz blackbird-obmc-linux-d6c73964f1e2a07f75057fb32ae46f6599036f93.zip | |
bsg: fix race of bsg_open and bsg_unregister
The existing implementation allows races between bsg_unregister and
bsg_open paths. bsg_unregister and request_queue cleanup and deletion
may start and complete right after bsg_get_device (in bsg_open path)
retrieves bsg_class_device and releases the mutex. Then bsg_open path
touches freed memory of bsg_class_device and request_queue.
One possible fix is to hold the mutex all the way through bsg_get_device
instead of releasing it after bsg_class_device retrieval.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-Off-By: Anatoliy Glagolev <glagolig@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions
