| 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-2024-39469: nilfs2: fix nilfs_empty_dir() misjudgment and long loop on I/O errors |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| nilfs2: fix nilfs_empty_dir() misjudgment and long loop on I/O errors |
| |
| The error handling in nilfs_empty_dir() when a directory folio/page read |
| fails is incorrect, as in the old ext2 implementation, and if the |
| folio/page cannot be read or nilfs_check_folio() fails, it will falsely |
| determine the directory as empty and corrupt the file system. |
| |
| In addition, since nilfs_empty_dir() does not immediately return on a |
| failed folio/page read, but continues to loop, this can cause a long loop |
| with I/O if i_size of the directory's inode is also corrupted, causing the |
| log writer thread to wait and hang, as reported by syzbot. |
| |
| Fix these issues by making nilfs_empty_dir() immediately return a false |
| value (0) if it fails to get a directory folio/page. |
| |
| The Linux kernel CVE team has assigned CVE-2024-39469 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 2.6.30 with commit 2ba466d74ed74f073257f86e61519cb8f8f46184 and fixed in 4.19.317 with commit 2ac8a2fe22bdde9eecce2a42cf5cab79333fb428 |
| Issue introduced in 2.6.30 with commit 2ba466d74ed74f073257f86e61519cb8f8f46184 and fixed in 5.4.279 with commit 405b71f1251e5ae865f53bd27c45114e6c83bee3 |
| Issue introduced in 2.6.30 with commit 2ba466d74ed74f073257f86e61519cb8f8f46184 and fixed in 5.10.221 with commit c77ad608df6c091fe64ecb91f41ef7cb465587f1 |
| Issue introduced in 2.6.30 with commit 2ba466d74ed74f073257f86e61519cb8f8f46184 and fixed in 5.15.162 with commit 11a2edb70356a2202dcb7c9c189c8356ab4752cd |
| Issue introduced in 2.6.30 with commit 2ba466d74ed74f073257f86e61519cb8f8f46184 and fixed in 6.1.95 with commit 129dcd3e7d036218db3f59c82d82004b9539ed82 |
| Issue introduced in 2.6.30 with commit 2ba466d74ed74f073257f86e61519cb8f8f46184 and fixed in 6.6.35 with commit d18b05eda7fa77f02114f15b02c009f28ee42346 |
| Issue introduced in 2.6.30 with commit 2ba466d74ed74f073257f86e61519cb8f8f46184 and fixed in 6.9.5 with commit 59f14875a96ef93f05b82ad3c980605f2cb444b5 |
| Issue introduced in 2.6.30 with commit 2ba466d74ed74f073257f86e61519cb8f8f46184 and fixed in 6.10 with commit 7373a51e7998b508af7136530f3a997b286ce81c |
| |
| 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-2024-39469 |
| 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/nilfs2/dir.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/2ac8a2fe22bdde9eecce2a42cf5cab79333fb428 |
| https://git.kernel.org/stable/c/405b71f1251e5ae865f53bd27c45114e6c83bee3 |
| https://git.kernel.org/stable/c/c77ad608df6c091fe64ecb91f41ef7cb465587f1 |
| https://git.kernel.org/stable/c/11a2edb70356a2202dcb7c9c189c8356ab4752cd |
| https://git.kernel.org/stable/c/129dcd3e7d036218db3f59c82d82004b9539ed82 |
| https://git.kernel.org/stable/c/d18b05eda7fa77f02114f15b02c009f28ee42346 |
| https://git.kernel.org/stable/c/59f14875a96ef93f05b82ad3c980605f2cb444b5 |
| https://git.kernel.org/stable/c/7373a51e7998b508af7136530f3a997b286ce81c |
