| 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-2024-50116: nilfs2: fix kernel bug due to missing clearing of buffer delay flag |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| nilfs2: fix kernel bug due to missing clearing of buffer delay flag |
| |
| Syzbot reported that after nilfs2 reads a corrupted file system image |
| and degrades to read-only, the BUG_ON check for the buffer delay flag |
| in submit_bh_wbc() may fail, causing a kernel bug. |
| |
| This is because the buffer delay flag is not cleared when clearing the |
| buffer state flags to discard a page/folio or a buffer head. So, fix |
| this. |
| |
| This became necessary when the use of nilfs2's own page clear routine |
| was expanded. This state inconsistency does not occur if the buffer |
| is written normally by log writing. |
| |
| The Linux kernel CVE team has assigned CVE-2024-50116 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 3.10 with commit 8c26c4e2694a163d525976e804d81cd955bbb40c and fixed in 4.19.323 with commit 033bc52f35868c2493a2d95c56ece7fc155d7cb3 |
| Issue introduced in 3.10 with commit 8c26c4e2694a163d525976e804d81cd955bbb40c and fixed in 5.4.285 with commit 412a30b1b28d6073ba29c46a2b0f324c5936293f |
| Issue introduced in 3.10 with commit 8c26c4e2694a163d525976e804d81cd955bbb40c and fixed in 5.10.229 with commit 9f2ab98371c2f2488bf3bf3f9b2a73510545e9c1 |
| Issue introduced in 3.10 with commit 8c26c4e2694a163d525976e804d81cd955bbb40c and fixed in 5.15.170 with commit 822203f6355f4b322d21e7115419f6b98284be25 |
| Issue introduced in 3.10 with commit 8c26c4e2694a163d525976e804d81cd955bbb40c and fixed in 6.1.115 with commit 27524f65621f490184f2ace44cd8e5f3685af4a3 |
| Issue introduced in 3.10 with commit 8c26c4e2694a163d525976e804d81cd955bbb40c and fixed in 6.6.59 with commit 743c78d455e784097011ea958b27396001181567 |
| Issue introduced in 3.10 with commit 8c26c4e2694a163d525976e804d81cd955bbb40c and fixed in 6.11.6 with commit c6f58ff2d4c552927fe9a187774e668ebba6c7aa |
| Issue introduced in 3.10 with commit 8c26c4e2694a163d525976e804d81cd955bbb40c and fixed in 6.12 with commit 6ed469df0bfbef3e4b44fca954a781919db9f7ab |
| |
| 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-2024-50116 |
| 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/page.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/033bc52f35868c2493a2d95c56ece7fc155d7cb3 |
| https://git.kernel.org/stable/c/412a30b1b28d6073ba29c46a2b0f324c5936293f |
| https://git.kernel.org/stable/c/9f2ab98371c2f2488bf3bf3f9b2a73510545e9c1 |
| https://git.kernel.org/stable/c/822203f6355f4b322d21e7115419f6b98284be25 |
| https://git.kernel.org/stable/c/27524f65621f490184f2ace44cd8e5f3685af4a3 |
| https://git.kernel.org/stable/c/743c78d455e784097011ea958b27396001181567 |
| https://git.kernel.org/stable/c/c6f58ff2d4c552927fe9a187774e668ebba6c7aa |
| https://git.kernel.org/stable/c/6ed469df0bfbef3e4b44fca954a781919db9f7ab |
