| 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-2022-49359: drm/panfrost: Job should reference MMU not file_priv |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/panfrost: Job should reference MMU not file_priv |
| |
| For a while now it's been allowed for a MMU context to outlive it's |
| corresponding panfrost_priv, however the job structure still references |
| panfrost_priv to get hold of the MMU context. If panfrost_priv has been |
| freed this is a use-after-free which I've been able to trigger resulting |
| in a splat. |
| |
| To fix this, drop the reference to panfrost_priv in the job structure |
| and add a direct reference to the MMU structure which is what's actually |
| needed. |
| |
| The Linux kernel CVE team has assigned CVE-2022-49359 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.15 with commit 7fdc48cc63a30fa3480d18bdd8c5fff2b9b15212 and fixed in 5.17.15 with commit 8c8e8cc91a6ffc79865108279a74fd57d9070a17 |
| Issue introduced in 5.15 with commit 7fdc48cc63a30fa3480d18bdd8c5fff2b9b15212 and fixed in 5.18.4 with commit 472dd7ea5e19a1aeabf1711ddc756777e05ee7c2 |
| Issue introduced in 5.15 with commit 7fdc48cc63a30fa3480d18bdd8c5fff2b9b15212 and fixed in 5.19 with commit 6e516faf04317db2c46cbec4e3b78b4653a5b109 |
| Issue introduced in 5.10.67 with commit c29485e34e63198dca6289639aa711f99d88e76e |
| Issue introduced in 5.13.19 with commit 626adede2642f00c8918999a2451bd0a644ab9b7 |
| Issue introduced in 5.14.6 with commit cf461fa9250a634e8afc4433d82ae0decea8136e |
| |
| 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-2022-49359 |
| 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/gpu/drm/panfrost/panfrost_drv.c |
| drivers/gpu/drm/panfrost/panfrost_job.c |
| drivers/gpu/drm/panfrost/panfrost_job.h |
| |
| |
| 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/8c8e8cc91a6ffc79865108279a74fd57d9070a17 |
| https://git.kernel.org/stable/c/472dd7ea5e19a1aeabf1711ddc756777e05ee7c2 |
| https://git.kernel.org/stable/c/6e516faf04317db2c46cbec4e3b78b4653a5b109 |
