| 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-2024-38553: net: fec: remove .ndo_poll_controller to avoid deadlocks |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| net: fec: remove .ndo_poll_controller to avoid deadlocks |
| |
| There is a deadlock issue found in sungem driver, please refer to the |
| commit ac0a230f719b ("eth: sungem: remove .ndo_poll_controller to avoid |
| deadlocks"). The root cause of the issue is that netpoll is in atomic |
| context and disable_irq() is called by .ndo_poll_controller interface |
| of sungem driver, however, disable_irq() might sleep. After analyzing |
| the implementation of fec_poll_controller(), the fec driver should have |
| the same issue. Due to the fec driver uses NAPI for TX completions, the |
| .ndo_poll_controller is unnecessary to be implemented in the fec driver, |
| so fec_poll_controller() can be safely removed. |
| |
| The Linux kernel CVE team has assigned CVE-2024-38553 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 3.2 with commit 7f5c6addcdc039c1a7c435857e6284ecac5d97c8 and fixed in 6.1.119 with commit e2348d8c61d03feece1de4c05f72e6e99f74c650 |
| Issue introduced in 3.2 with commit 7f5c6addcdc039c1a7c435857e6284ecac5d97c8 and fixed in 6.6.33 with commit d38625f71950e79e254515c5fc585552dad4b33e |
| Issue introduced in 3.2 with commit 7f5c6addcdc039c1a7c435857e6284ecac5d97c8 and fixed in 6.8.12 with commit accdd6b912c4219b8e056d1f1ad2e85bc66ee243 |
| Issue introduced in 3.2 with commit 7f5c6addcdc039c1a7c435857e6284ecac5d97c8 and fixed in 6.9.3 with commit 87bcbc9b7e0b43a69d44efa5f32f11e32d08fa6f |
| Issue introduced in 3.2 with commit 7f5c6addcdc039c1a7c435857e6284ecac5d97c8 and fixed in 6.10 with commit c2e0c58b25a0a0c37ec643255558c5af4450c9f5 |
| |
| 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-2024-38553 |
| 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/freescale/fec_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/e2348d8c61d03feece1de4c05f72e6e99f74c650 |
| https://git.kernel.org/stable/c/d38625f71950e79e254515c5fc585552dad4b33e |
| https://git.kernel.org/stable/c/accdd6b912c4219b8e056d1f1ad2e85bc66ee243 |
| https://git.kernel.org/stable/c/87bcbc9b7e0b43a69d44efa5f32f11e32d08fa6f |
| https://git.kernel.org/stable/c/c2e0c58b25a0a0c37ec643255558c5af4450c9f5 |
