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nvme-rdma: fix a segmentation fault during module unload 

In case there are controllers that are not associated with any RDMA
device (e.g. during unsuccessful reconnection) and the user will unload
the module, these controllers will not be freed and will access already
freed memory. The same logic appears in other fabric drivers as well.

Fixes: 87fd125344 ("nvme-rdma: remove redundant reference between ib_device and tagset")
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Max Gurtovoy <maxg@mellanox.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
This commit is contained in:
Max Gurtovoy 2019-10-29 16:42:27 +02:00 committed by Keith Busch
parent 41591a51f0
commit 9ad9e8d6ca
1 changed files with 8 additions and 0 deletions
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8
drivers/nvme/host/rdma.c
View File

@ -2133,8 +2133,16 @@ err_unreg_client:
static void __exit nvme_rdma_cleanup_module(void)
{
struct nvme_rdma_ctrl *ctrl;
nvmf_unregister_transport(&nvme_rdma_transport);
ib_unregister_client(&nvme_rdma_ib_client);
mutex_lock(&nvme_rdma_ctrl_mutex);
list_for_each_entry(ctrl, &nvme_rdma_ctrl_list, list)
nvme_delete_ctrl(&ctrl->ctrl);
mutex_unlock(&nvme_rdma_ctrl_mutex);
flush_workqueue(nvme_delete_wq);
}
module_init(nvme_rdma_init_module);