| 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-2021-46914: ixgbe: fix unbalanced device enable/disable in suspend/resume |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| ixgbe: fix unbalanced device enable/disable in suspend/resume |
| |
| pci_disable_device() called in __ixgbe_shutdown() decreases |
| dev->enable_cnt by 1. pci_enable_device_mem() which increases |
| dev->enable_cnt by 1, was removed from ixgbe_resume() in commit |
| 6f82b2558735 ("ixgbe: use generic power management"). This caused |
| unbalanced increase/decrease. So add pci_enable_device_mem() back. |
| |
| Fix the following call trace. |
| |
| ixgbe 0000:17:00.1: disabling already-disabled device |
| Call Trace: |
| __ixgbe_shutdown+0x10a/0x1e0 [ixgbe] |
| ixgbe_suspend+0x32/0x70 [ixgbe] |
| pci_pm_suspend+0x87/0x160 |
| ? pci_pm_freeze+0xd0/0xd0 |
| dpm_run_callback+0x42/0x170 |
| __device_suspend+0x114/0x460 |
| async_suspend+0x1f/0xa0 |
| async_run_entry_fn+0x3c/0xf0 |
| process_one_work+0x1dd/0x410 |
| worker_thread+0x34/0x3f0 |
| ? cancel_delayed_work+0x90/0x90 |
| kthread+0x14c/0x170 |
| ? kthread_park+0x90/0x90 |
| ret_from_fork+0x1f/0x30 |
| |
| The Linux kernel CVE team has assigned CVE-2021-46914 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.9 with commit 6f82b25587354ce7c9c42e0b53d8b0770b900847 and fixed in 5.10.32 with commit be07581aacae7cd0a073afae8e8862032f794309 |
| Issue introduced in 5.9 with commit 6f82b25587354ce7c9c42e0b53d8b0770b900847 and fixed in 5.11.16 with commit f1b4be4a753caa4056496f679d70550d0c11a264 |
| Issue introduced in 5.9 with commit 6f82b25587354ce7c9c42e0b53d8b0770b900847 and fixed in 5.12 with commit debb9df311582c83fe369baa35fa4b92e8a9c58a |
| |
| 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-2021-46914 |
| 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/net/ethernet/intel/ixgbe/ixgbe_main.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/be07581aacae7cd0a073afae8e8862032f794309 |
| https://git.kernel.org/stable/c/f1b4be4a753caa4056496f679d70550d0c11a264 |
| https://git.kernel.org/stable/c/debb9df311582c83fe369baa35fa4b92e8a9c58a |
