| 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-2023-52852: f2fs: compress: fix to avoid use-after-free on dic |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| f2fs: compress: fix to avoid use-after-free on dic |
| |
| Call trace: |
| __memcpy+0x128/0x250 |
| f2fs_read_multi_pages+0x940/0xf7c |
| f2fs_mpage_readpages+0x5a8/0x624 |
| f2fs_readahead+0x5c/0x110 |
| page_cache_ra_unbounded+0x1b8/0x590 |
| do_sync_mmap_readahead+0x1dc/0x2e4 |
| filemap_fault+0x254/0xa8c |
| f2fs_filemap_fault+0x2c/0x104 |
| __do_fault+0x7c/0x238 |
| do_handle_mm_fault+0x11bc/0x2d14 |
| do_mem_abort+0x3a8/0x1004 |
| el0_da+0x3c/0xa0 |
| el0t_64_sync_handler+0xc4/0xec |
| el0t_64_sync+0x1b4/0x1b8 |
| |
| In f2fs_read_multi_pages(), once f2fs_decompress_cluster() was called if |
| we hit cached page in compress_inode's cache, dic may be released, it needs |
| break the loop rather than continuing it, in order to avoid accessing |
| invalid dic pointer. |
| |
| The Linux kernel CVE team has assigned CVE-2023-52852 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.14 with commit 6ce19aff0b8cd386860855185c6cd79337fc4d2b and fixed in 5.15.139 with commit 8c4504cc0c64862740a6acb301e0cfa59580dbc5 |
| Issue introduced in 5.14 with commit 6ce19aff0b8cd386860855185c6cd79337fc4d2b and fixed in 6.1.63 with commit 9375ea7f269093d7c884857ae1f47633a91f429c |
| Issue introduced in 5.14 with commit 6ce19aff0b8cd386860855185c6cd79337fc4d2b and fixed in 6.5.12 with commit 932ddb5c29e884cc6fac20417ece72ba4a35c401 |
| Issue introduced in 5.14 with commit 6ce19aff0b8cd386860855185c6cd79337fc4d2b and fixed in 6.6.2 with commit 9d065aa52b6ee1b06f9c4eca881c9b4425a12ba2 |
| Issue introduced in 5.14 with commit 6ce19aff0b8cd386860855185c6cd79337fc4d2b and fixed in 6.7 with commit b0327c84e91a0f4f0abced8cb83ec86a7083f086 |
| Issue introduced in 5.13.19 with commit a23706426da9b611be5beae0f3faa260fb453b4e |
| |
| 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-2023-52852 |
| 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/f2fs/data.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/8c4504cc0c64862740a6acb301e0cfa59580dbc5 |
| https://git.kernel.org/stable/c/9375ea7f269093d7c884857ae1f47633a91f429c |
| https://git.kernel.org/stable/c/932ddb5c29e884cc6fac20417ece72ba4a35c401 |
| https://git.kernel.org/stable/c/9d065aa52b6ee1b06f9c4eca881c9b4425a12ba2 |
| https://git.kernel.org/stable/c/b0327c84e91a0f4f0abced8cb83ec86a7083f086 |
