CVE-2023-52444: f2fs: fix to avoid dirent corruption
First published: Thu Feb 22 2024(Updated: )
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]
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=4.2.0<4.19.306 | |
| Linux Kernel | >=4.20<5.4.268 | |
| Linux Kernel | >=5.5.0<5.10.209 | |
| Linux Kernel | >=5.11.0<5.15.148 | |
| Linux Kernel | >=5.16.0<6.1.75 | |
| Linux Kernel | >=6.2.0<6.6.14 | |
| Linux Kernel | >=6.7.0<6.7.2 | |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.123-1 6.1.119-1 6.12.11-1 6.12.12-1 |
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Reference Links
- https://git.kernel.org/stable/c/02160112e6d45c2610b049df6eb693d7a2e57b46
- https://git.kernel.org/stable/c/2fb4867f4405aea8c0519d7d188207f232a57862
- https://git.kernel.org/stable/c/53edb549565f55ccd0bdf43be3d66ce4c2d48b28
- https://git.kernel.org/stable/c/5624a3c1b1ebc8991318e1cce2aa719542991024
- https://git.kernel.org/stable/c/6f866885e147d33efc497f1095f35b2ee5ec7310
- https://git.kernel.org/stable/c/d3c0b49aaa12a61d560528f5d605029ab57f0728
- https://git.kernel.org/stable/c/f0145860c20be6bae6785c7a2249577674702ac7
- https://git.kernel.org/stable/c/f100ba617d8be6c98a68f3744ef7617082975b77
- https://launchpad.net/bugs/cve/CVE-2023-52444
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-52444
- https://nvd.nist.gov/vuln/detail/CVE-2023-52444
- https://security-tracker.debian.org/tracker/CVE-2023-52444
- https://ubuntu.com/security/CVE-2023-52444
- https://lists.debian.org/debian-lts-announce/2024/06/msg00016.html
- https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
- https://git.kernel.org/linus/53edb549565f55ccd0bdf43be3d66ce4c2d48b28
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