| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2024-50135: nvme-pci: fix race condition between reset and nvme_dev_disable() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| nvme-pci: fix race condition between reset and nvme_dev_disable() |
| |
| nvme_dev_disable() modifies the dev->online_queues field, therefore |
| nvme_pci_update_nr_queues() should avoid racing against it, otherwise |
| we could end up passing invalid values to blk_mq_update_nr_hw_queues(). |
| |
| WARNING: CPU: 39 PID: 61303 at drivers/pci/msi/api.c:347 |
| pci_irq_get_affinity+0x187/0x210 |
| Workqueue: nvme-reset-wq nvme_reset_work [nvme] |
| RIP: 0010:pci_irq_get_affinity+0x187/0x210 |
| Call Trace: |
| <TASK> |
| ? blk_mq_pci_map_queues+0x87/0x3c0 |
| ? pci_irq_get_affinity+0x187/0x210 |
| blk_mq_pci_map_queues+0x87/0x3c0 |
| nvme_pci_map_queues+0x189/0x460 [nvme] |
| blk_mq_update_nr_hw_queues+0x2a/0x40 |
| nvme_reset_work+0x1be/0x2a0 [nvme] |
| |
| Fix the bug by locking the shutdown_lock mutex before using |
| dev->online_queues. Give up if nvme_dev_disable() is running or if |
| it has been executed already. |
| |
| The Linux kernel CVE team has assigned CVE-2024-50135 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.6 with commit 949928c1c731417cc0f070912c63878b62b544f4 and fixed in 6.6.59 with commit 4ed32cc0939b64e3d7b48c8c0d63ea038775f304 |
| Issue introduced in 4.6 with commit 949928c1c731417cc0f070912c63878b62b544f4 and fixed in 6.11.6 with commit b33e49a5f254474b33ce98fd45dd0ffdc247a0be |
| Issue introduced in 4.6 with commit 949928c1c731417cc0f070912c63878b62b544f4 and fixed in 6.12 with commit 26bc0a81f64ce00fc4342c38eeb2eddaad084dd2 |
| |
| Please see https://www.kernel.org for a full list of currently supported |
| kernel versions by the kernel community. |
| |
| Unaffected versions might change over time as fixes are backported to |
| older supported kernel versions. The official CVE entry at |
| https://cve.org/CVERecord/?id=CVE-2024-50135 |
| will be updated if fixes are backported, please check that for the most |
| up to date information about this issue. |
| |
| |
| Affected files |
| ============== |
| |
| The file(s) affected by this issue are: |
| drivers/nvme/host/pci.c |
| |
| |
| Mitigation |
| ========== |
| |
| The Linux kernel CVE team recommends that you update to the latest |
| stable kernel version for this, and many other bugfixes. Individual |
| changes are never tested alone, but rather are part of a larger kernel |
| release. Cherry-picking individual commits is not recommended or |
| supported by the Linux kernel community at all. If however, updating to |
| the latest release is impossible, the individual changes to resolve this |
| issue can be found at these commits: |
| https://git.kernel.org/stable/c/4ed32cc0939b64e3d7b48c8c0d63ea038775f304 |
| https://git.kernel.org/stable/c/b33e49a5f254474b33ce98fd45dd0ffdc247a0be |
| https://git.kernel.org/stable/c/26bc0a81f64ce00fc4342c38eeb2eddaad084dd2 |
