| 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-2024-46692: firmware: qcom: scm: Mark get_wq_ctx() as atomic call |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| firmware: qcom: scm: Mark get_wq_ctx() as atomic call |
| |
| Currently get_wq_ctx() is wrongly configured as a standard call. When two |
| SMC calls are in sleep and one SMC wakes up, it calls get_wq_ctx() to |
| resume the corresponding sleeping thread. But if get_wq_ctx() is |
| interrupted, goes to sleep and another SMC call is waiting to be allocated |
| a waitq context, it leads to a deadlock. |
| |
| To avoid this get_wq_ctx() must be an atomic call and can't be a standard |
| SMC call. Hence mark get_wq_ctx() as a fast call. |
| |
| The Linux kernel CVE team has assigned CVE-2024-46692 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.3 with commit 6bf32599223634294cdc6efb359ffaab1d68073c and fixed in 6.6.49 with commit cdf7efe4b02aa93813db0bf1ca596ad298ab6b06 |
| Issue introduced in 6.3 with commit 6bf32599223634294cdc6efb359ffaab1d68073c and fixed in 6.10.8 with commit e40115c33c0d79c940545b6b12112aace7acd9f5 |
| Issue introduced in 6.3 with commit 6bf32599223634294cdc6efb359ffaab1d68073c and fixed in 6.11 with commit 9960085a3a82c58d3323c1c20b991db6045063b0 |
| |
| 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-2024-46692 |
| 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/firmware/qcom/qcom_scm-smc.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/cdf7efe4b02aa93813db0bf1ca596ad298ab6b06 |
| https://git.kernel.org/stable/c/e40115c33c0d79c940545b6b12112aace7acd9f5 |
| https://git.kernel.org/stable/c/9960085a3a82c58d3323c1c20b991db6045063b0 |
