| 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-2022-49635: drm/i915/selftests: fix subtraction overflow bug |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/i915/selftests: fix subtraction overflow bug |
| |
| On some machines hole_end can be small enough to cause subtraction |
| overflow. On the other side (addr + 2 * min_alignment) can overflow |
| in case of mock tests. This patch should handle both cases. |
| |
| (cherry picked from commit ab3edc679c552a466e4bf0b11af3666008bd65a2) |
| |
| The Linux kernel CVE team has assigned CVE-2022-49635 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.12 with commit e1c5f754067b594de58d387aa5873dec83b6c9fd and fixed in 5.18.13 with commit e8997d2d6b8d764e12489f1af2a1ce1d7384ca2a |
| Issue introduced in 4.12 with commit e1c5f754067b594de58d387aa5873dec83b6c9fd and fixed in 5.19 with commit 333991c4e66b3d4b5613315f18016da80344f659 |
| |
| 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-2022-49635 |
| 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/i915/selftests/i915_gem_gtt.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/e8997d2d6b8d764e12489f1af2a1ce1d7384ca2a |
| https://git.kernel.org/stable/c/333991c4e66b3d4b5613315f18016da80344f659 |
