diff options
| author | Sagi Grimberg <sagi@grimberg.me> | 2022-02-01 15:54:21 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-02-23 14:03:07 +0300 |
| commit | 646952b2210f19e584d2bf9eb5d092abdca2fcc1 (patch) | |
| tree | 70890b2eeac302ce832f0b2cb881c28da19f33f4 /drivers/nvme/host | |
| parent | 5e42fca37ccc76f39f73732661bd47254cad5982 (diff) | |
| download | linux-646952b2210f19e584d2bf9eb5d092abdca2fcc1.tar.xz | |
nvme-rdma: fix possible use-after-free in transport error_recovery work
[ Upstream commit b6bb1722f34bbdbabed27acdceaf585d300c5fd2 ]
While nvme_rdma_submit_async_event_work is checking the ctrl and queue
state before preparing the AER command and scheduling io_work, in order
to fully prevent a race where this check is not reliable the error
recovery work must flush async_event_work before continuing to destroy
the admin queue after setting the ctrl state to RESETTING such that
there is no race .submit_async_event and the error recovery handler
itself changing the ctrl state.
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/nvme/host')
| -rw-r--r-- | drivers/nvme/host/rdma.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c index 0498801542eb..d51f52e296f5 100644 --- a/drivers/nvme/host/rdma.c +++ b/drivers/nvme/host/rdma.c @@ -1192,6 +1192,7 @@ static void nvme_rdma_error_recovery_work(struct work_struct *work) struct nvme_rdma_ctrl, err_work); nvme_stop_keep_alive(&ctrl->ctrl); + flush_work(&ctrl->ctrl.async_event_work); nvme_rdma_teardown_io_queues(ctrl, false); nvme_start_queues(&ctrl->ctrl); nvme_rdma_teardown_admin_queue(ctrl, false); |