From: Jianchao Wang <jianchao.w.wang@oracle.com> To: keith.busch@intel.com, axboe@fb.com, hch@lst.de, sagi@grimberg.me Cc: linux-nvme@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH V2] nvme-rdma: stop queue first before free it in config admin queue Date: Thu, 10 May 2018 17:42:27 +0800 [thread overview] Message-ID: <1525945347-1964-1-git-send-email-jianchao.w.wang@oracle.com> (raw) When any of cases after nvme_rdma_start_queue in nvme_rdma_configure_admin_queue fails, the ctrl->queues[0] will be freed but the NVME_RDMA_Q_LIVE is still set. If nvme_rdma_stop_queue is invoked, we will incur use-after-free which will cause memory corruption. BUG: KASAN: use-after-free in rdma_disconnect+0x1f/0xe0 [rdma_cm] Read of size 8 at addr ffff8801dc3969c0 by task kworker/u16:3/9304 CPU: 3 PID: 9304 Comm: kworker/u16:3 Kdump: loaded Tainted: G W 4.17.0-rc3+ #20 Workqueue: nvme-delete-wq nvme_delete_ctrl_work Call Trace: dump_stack+0x91/0xeb print_address_description+0x6b/0x290 kasan_report+0x261/0x360 rdma_disconnect+0x1f/0xe0 [rdma_cm] nvme_rdma_stop_queue+0x25/0x40 [nvme_rdma] nvme_rdma_shutdown_ctrl+0xf3/0x150 [nvme_rdma] nvme_delete_ctrl_work+0x98/0xe0 process_one_work+0x3ca/0xaa0 worker_thread+0x4e2/0x6c0 kthread+0x18d/0x1e0 ret_from_fork+0x24/0x30 To fix it, call nvme_rdma_stop_queue for all the failed cases after nvme_rdma_start_queue. Signed-off-by: Jianchao Wang <jianchao.w.wang@oracle.com> --- V2: based on Sagi's suggestion, add out_stop_queue lable and invoke nvme_rdma_stop_queue in all the failed cases after nvme_rdma_start_queue drivers/nvme/host/rdma.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c index a0ead1d..966e0dd 100644 --- a/drivers/nvme/host/rdma.c +++ b/drivers/nvme/host/rdma.c @@ -777,7 +777,7 @@ static int nvme_rdma_configure_admin_queue(struct nvme_rdma_ctrl *ctrl, if (error) { dev_err(ctrl->ctrl.device, "prop_get NVME_REG_CAP failed\n"); - goto out_cleanup_queue; + goto out_stop_queue; } ctrl->ctrl.sqsize = @@ -785,23 +785,25 @@ static int nvme_rdma_configure_admin_queue(struct nvme_rdma_ctrl *ctrl, error = nvme_enable_ctrl(&ctrl->ctrl, ctrl->ctrl.cap); if (error) - goto out_cleanup_queue; + goto out_stop_queue; ctrl->ctrl.max_hw_sectors = (ctrl->max_fr_pages - 1) << (ilog2(SZ_4K) - 9); error = nvme_init_identify(&ctrl->ctrl); if (error) - goto out_cleanup_queue; + goto out_stop_queue; error = nvme_rdma_alloc_qe(ctrl->queues[0].device->dev, &ctrl->async_event_sqe, sizeof(struct nvme_command), DMA_TO_DEVICE); if (error) - goto out_cleanup_queue; + goto out_stop_queue; return 0; +out_stop_queue: + nvme_rdma_stop_queue(&ctrl->queues[0]); out_cleanup_queue: if (new) blk_cleanup_queue(ctrl->ctrl.admin_q); -- 2.7.4
WARNING: multiple messages have this Message-ID (diff)
From: jianchao.w.wang@oracle.com (Jianchao Wang) Subject: [PATCH V2] nvme-rdma: stop queue first before free it in config admin queue Date: Thu, 10 May 2018 17:42:27 +0800 [thread overview] Message-ID: <1525945347-1964-1-git-send-email-jianchao.w.wang@oracle.com> (raw) When any of cases after nvme_rdma_start_queue in nvme_rdma_configure_admin_queue fails, the ctrl->queues[0] will be freed but the NVME_RDMA_Q_LIVE is still set. If nvme_rdma_stop_queue is invoked, we will incur use-after-free which will cause memory corruption. BUG: KASAN: use-after-free in rdma_disconnect+0x1f/0xe0 [rdma_cm] Read of size 8 at addr ffff8801dc3969c0 by task kworker/u16:3/9304 CPU: 3 PID: 9304 Comm: kworker/u16:3 Kdump: loaded Tainted: G W 4.17.0-rc3+ #20 Workqueue: nvme-delete-wq nvme_delete_ctrl_work Call Trace: dump_stack+0x91/0xeb print_address_description+0x6b/0x290 kasan_report+0x261/0x360 rdma_disconnect+0x1f/0xe0 [rdma_cm] nvme_rdma_stop_queue+0x25/0x40 [nvme_rdma] nvme_rdma_shutdown_ctrl+0xf3/0x150 [nvme_rdma] nvme_delete_ctrl_work+0x98/0xe0 process_one_work+0x3ca/0xaa0 worker_thread+0x4e2/0x6c0 kthread+0x18d/0x1e0 ret_from_fork+0x24/0x30 To fix it, call nvme_rdma_stop_queue for all the failed cases after nvme_rdma_start_queue. Signed-off-by: Jianchao Wang <jianchao.w.wang at oracle.com> --- V2: based on Sagi's suggestion, add out_stop_queue lable and invoke nvme_rdma_stop_queue in all the failed cases after nvme_rdma_start_queue drivers/nvme/host/rdma.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c index a0ead1d..966e0dd 100644 --- a/drivers/nvme/host/rdma.c +++ b/drivers/nvme/host/rdma.c @@ -777,7 +777,7 @@ static int nvme_rdma_configure_admin_queue(struct nvme_rdma_ctrl *ctrl, if (error) { dev_err(ctrl->ctrl.device, "prop_get NVME_REG_CAP failed\n"); - goto out_cleanup_queue; + goto out_stop_queue; } ctrl->ctrl.sqsize = @@ -785,23 +785,25 @@ static int nvme_rdma_configure_admin_queue(struct nvme_rdma_ctrl *ctrl, error = nvme_enable_ctrl(&ctrl->ctrl, ctrl->ctrl.cap); if (error) - goto out_cleanup_queue; + goto out_stop_queue; ctrl->ctrl.max_hw_sectors = (ctrl->max_fr_pages - 1) << (ilog2(SZ_4K) - 9); error = nvme_init_identify(&ctrl->ctrl); if (error) - goto out_cleanup_queue; + goto out_stop_queue; error = nvme_rdma_alloc_qe(ctrl->queues[0].device->dev, &ctrl->async_event_sqe, sizeof(struct nvme_command), DMA_TO_DEVICE); if (error) - goto out_cleanup_queue; + goto out_stop_queue; return 0; +out_stop_queue: + nvme_rdma_stop_queue(&ctrl->queues[0]); out_cleanup_queue: if (new) blk_cleanup_queue(ctrl->ctrl.admin_q); -- 2.7.4
next reply other threads:[~2018-05-10 9:42 UTC|newest] Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-05-10 9:42 Jianchao Wang [this message] 2018-05-10 9:42 ` [PATCH V2] nvme-rdma: stop queue first before free it in config admin queue Jianchao Wang 2018-05-16 12:06 ` Max Gurtovoy 2018-05-16 12:06 ` Max Gurtovoy -- strict thread matches above, loose matches on Subject: below -- 2018-05-10 9:37 Jianchao Wang 2018-05-10 9:37 ` Jianchao Wang
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