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| author | Xiubo Li <xiubli@redhat.com> | 2020-10-14 05:45:14 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-11-05 13:06:58 +0300 |
| commit | 0a4e383fc3aa6540f804c4fd1184a96ae5de6ef8 (patch) | |
| tree | e304a76e52d37aa2a30e0960613aba17b954a07f /lib | |
| parent | 090a280e8e824c39bee5b4f439cfce10cb362c9c (diff) | |
| download | linux-0a4e383fc3aa6540f804c4fd1184a96ae5de6ef8.tar.xz | |
nbd: make the config put is called before the notifying the waiter
[ Upstream commit 87aac3a80af5cbad93e63250e8a1e19095ba0d30 ]
There has one race case for ceph's rbd-nbd tool. When do mapping
it may fail with EBUSY from ioctl(nbd, NBD_DO_IT), but actually
the nbd device has already unmaped.
It dues to if just after the wake_up(), the recv_work() is scheduled
out and defers calling the nbd_config_put(), though the map process
has exited the "nbd->recv_task" is not cleared.
Signed-off-by: Xiubo Li <xiubli@redhat.com>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'lib')
0 files changed, 0 insertions, 0 deletions