| From bippy-1.1.0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@kernel.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2023-53144: erofs: fix wrong kunmap when using LZMA on HIGHMEM platforms |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| erofs: fix wrong kunmap when using LZMA on HIGHMEM platforms |
| |
| As the call trace shown, the root cause is kunmap incorrect pages: |
| |
| BUG: kernel NULL pointer dereference, address: 00000000 |
| CPU: 1 PID: 40 Comm: kworker/u5:0 Not tainted 6.2.0-rc5 #4 |
| Workqueue: erofs_worker z_erofs_decompressqueue_work |
| EIP: z_erofs_lzma_decompress+0x34b/0x8ac |
| z_erofs_decompress+0x12/0x14 |
| z_erofs_decompress_queue+0x7e7/0xb1c |
| z_erofs_decompressqueue_work+0x32/0x60 |
| process_one_work+0x24b/0x4d8 |
| ? process_one_work+0x1a4/0x4d8 |
| worker_thread+0x14c/0x3fc |
| kthread+0xe6/0x10c |
| ? rescuer_thread+0x358/0x358 |
| ? kthread_complete_and_exit+0x18/0x18 |
| ret_from_fork+0x1c/0x28 |
| ---[ end trace 0000000000000000 ]--- |
| |
| The bug is trivial and should be fixed now. It has no impact on |
| !HIGHMEM platforms. |
| |
| The Linux kernel CVE team has assigned CVE-2023-53144 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.16 with commit 622ceaddb7649ca328832f50ba1400af778d75fa and fixed in 6.1.20 with commit fa4056781ac067b5946c6811459e1a36842047fd |
| Issue introduced in 5.16 with commit 622ceaddb7649ca328832f50ba1400af778d75fa and fixed in 6.2.7 with commit 28aea8ae6cf212a5bf3ed962b27921e2029ad754 |
| Issue introduced in 5.16 with commit 622ceaddb7649ca328832f50ba1400af778d75fa and fixed in 6.3 with commit 8f121dfb15f7b4ab345992ce96003eb63fd608f4 |
| |
| 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-2023-53144 |
| 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: |
| fs/erofs/decompressor_lzma.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/fa4056781ac067b5946c6811459e1a36842047fd |
| https://git.kernel.org/stable/c/28aea8ae6cf212a5bf3ed962b27921e2029ad754 |
| https://git.kernel.org/stable/c/8f121dfb15f7b4ab345992ce96003eb63fd608f4 |
