| 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-2023-52444: f2fs: fix to avoid dirent corruption |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| f2fs: fix to avoid dirent corruption |
| |
| As Al reported in link[1]: |
| |
| f2fs_rename() |
| ... |
| if (old_dir != new_dir && !whiteout) |
| f2fs_set_link(old_inode, old_dir_entry, |
| old_dir_page, new_dir); |
| else |
| f2fs_put_page(old_dir_page, 0); |
| |
| You want correct inumber in the ".." link. And cross-directory |
| rename does move the source to new parent, even if you'd been asked |
| to leave a whiteout in the old place. |
| |
| [1] https://lore.kernel.org/all/20231017055040.GN800259@ZenIV/ |
| |
| With below testcase, it may cause dirent corruption, due to it missed |
| to call f2fs_set_link() to update ".." link to new directory. |
| - mkdir -p dir/foo |
| - renameat2 -w dir/foo bar |
| |
| [ASSERT] (__chk_dots_dentries:1421) --> Bad inode number[0x4] for '..', parent parent ino is [0x3] |
| [FSCK] other corrupted bugs [Fail] |
| |
| The Linux kernel CVE team has assigned CVE-2023-52444 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.2 with commit 7e01e7ad746bc8198a8b46163ddc73a1c7d22339 and fixed in 4.19.306 with commit 02160112e6d45c2610b049df6eb693d7a2e57b46 |
| Issue introduced in 4.2 with commit 7e01e7ad746bc8198a8b46163ddc73a1c7d22339 and fixed in 5.4.268 with commit 5624a3c1b1ebc8991318e1cce2aa719542991024 |
| Issue introduced in 4.2 with commit 7e01e7ad746bc8198a8b46163ddc73a1c7d22339 and fixed in 5.10.209 with commit 6f866885e147d33efc497f1095f35b2ee5ec7310 |
| Issue introduced in 4.2 with commit 7e01e7ad746bc8198a8b46163ddc73a1c7d22339 and fixed in 5.15.148 with commit f100ba617d8be6c98a68f3744ef7617082975b77 |
| Issue introduced in 4.2 with commit 7e01e7ad746bc8198a8b46163ddc73a1c7d22339 and fixed in 6.1.75 with commit f0145860c20be6bae6785c7a2249577674702ac7 |
| Issue introduced in 4.2 with commit 7e01e7ad746bc8198a8b46163ddc73a1c7d22339 and fixed in 6.6.14 with commit d3c0b49aaa12a61d560528f5d605029ab57f0728 |
| Issue introduced in 4.2 with commit 7e01e7ad746bc8198a8b46163ddc73a1c7d22339 and fixed in 6.7.2 with commit 2fb4867f4405aea8c0519d7d188207f232a57862 |
| Issue introduced in 4.2 with commit 7e01e7ad746bc8198a8b46163ddc73a1c7d22339 and fixed in 6.8 with commit 53edb549565f55ccd0bdf43be3d66ce4c2d48b28 |
| |
| 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-2023-52444 |
| 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/namei.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/02160112e6d45c2610b049df6eb693d7a2e57b46 |
| https://git.kernel.org/stable/c/5624a3c1b1ebc8991318e1cce2aa719542991024 |
| https://git.kernel.org/stable/c/6f866885e147d33efc497f1095f35b2ee5ec7310 |
| https://git.kernel.org/stable/c/f100ba617d8be6c98a68f3744ef7617082975b77 |
| https://git.kernel.org/stable/c/f0145860c20be6bae6785c7a2249577674702ac7 |
| https://git.kernel.org/stable/c/d3c0b49aaa12a61d560528f5d605029ab57f0728 |
| https://git.kernel.org/stable/c/2fb4867f4405aea8c0519d7d188207f232a57862 |
| https://git.kernel.org/stable/c/53edb549565f55ccd0bdf43be3d66ce4c2d48b28 |
