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| author | Xiubo Li <xiubli@redhat.com> | 2020-10-13 22:45:14 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-11-05 11:08:45 +0100 |
| commit | 2ef6f4bd60411934e3fc2715442c2afe70f84bf3 (patch) | |
| tree | aa3b51d8b8ea3eca4c7b4cf236fd4e5c41d0209f /lib | |
| parent | c151f68411cdeac5d70b48a19758d20ab110e4cc (diff) | |
| download | linux-stable-2ef6f4bd60411934e3fc2715442c2afe70f84bf3.tar.gz linux-stable-2ef6f4bd60411934e3fc2715442c2afe70f84bf3.tar.bz2 linux-stable-2ef6f4bd60411934e3fc2715442c2afe70f84bf3.zip | |
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