| 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-2024-50213: drm/tests: hdmi: Fix memory leaks in drm_display_mode_from_cea_vic() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/tests: hdmi: Fix memory leaks in drm_display_mode_from_cea_vic() |
| |
| modprobe drm_hdmi_state_helper_test and then rmmod it, the following |
| memory leak occurs. |
| |
| The `mode` allocated in drm_mode_duplicate() called by |
| drm_display_mode_from_cea_vic() is not freed, which cause the memory leak: |
| |
| unreferenced object 0xffffff80ccd18100 (size 128): |
| comm "kunit_try_catch", pid 1851, jiffies 4295059695 |
| hex dump (first 32 bytes): |
| 57 62 00 00 80 02 90 02 f0 02 20 03 00 00 e0 01 Wb........ ..... |
| ea 01 ec 01 0d 02 00 00 0a 00 00 00 00 00 00 00 ................ |
| backtrace (crc c2f1aa95): |
| [<000000000f10b11b>] kmemleak_alloc+0x34/0x40 |
| [<000000001cd4cf73>] __kmalloc_cache_noprof+0x26c/0x2f4 |
| [<00000000f1f3cffa>] drm_mode_duplicate+0x44/0x19c |
| [<000000008cbeef13>] drm_display_mode_from_cea_vic+0x88/0x98 |
| [<0000000019daaacf>] 0xffffffedc11ae69c |
| [<000000000aad0f85>] kunit_try_run_case+0x13c/0x3ac |
| [<00000000a9210bac>] kunit_generic_run_threadfn_adapter+0x80/0xec |
| [<000000000a0b2e9e>] kthread+0x2e8/0x374 |
| [<00000000bd668858>] ret_from_fork+0x10/0x20 |
| ...... |
| |
| Free `mode` by using drm_kunit_display_mode_from_cea_vic() |
| to fix it. |
| |
| The Linux kernel CVE team has assigned CVE-2024-50213 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.11 with commit 4af70f19e55904147c0515ff874204a5306ac807 and fixed in 6.11.7 with commit 3bc3fae8a0f22e0e713729b50e2111f6a8c64724 |
| Issue introduced in 6.11 with commit 4af70f19e55904147c0515ff874204a5306ac807 and fixed in 6.12 with commit add4163aca0d4a86e9fe4aa513865e4237db8aef |
| |
| 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-2024-50213 |
| 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/tests/drm_hdmi_state_helper_test.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/3bc3fae8a0f22e0e713729b50e2111f6a8c64724 |
| https://git.kernel.org/stable/c/add4163aca0d4a86e9fe4aa513865e4237db8aef |
