ghsa-jvhc-rq6w-32mx
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
nilfs2: do not write dirty data after degenerating to read-only
According to syzbot's report, mark_buffer_dirty() called from nilfs_segctor_do_construct() outputs a warning with some patterns after nilfs2 detects metadata corruption and degrades to read-only mode.
After such read-only degeneration, page cache data may be cleared through nilfs_clear_dirty_page() which may also clear the uptodate flag for their buffer heads. However, even after the degeneration, log writes are still performed by unmount processing etc., which causes mark_buffer_dirty() to be called for buffer heads without the "uptodate" flag and causes the warning.
Since any writes should not be done to a read-only file system in the first place, this fixes the warning in mark_buffer_dirty() by letting nilfs_segctor_do_construct() abort early if in read-only mode.
This also changes the retry check of nilfs_segctor_write_out() to avoid unnecessary log write retries if it detects -EROFS that nilfs_segctor_do_construct() returned.
{
"affected": [],
"aliases": [
"CVE-2023-53337"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-09-17T15:15:36Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnilfs2: do not write dirty data after degenerating to read-only\n\nAccording to syzbot\u0027s report, mark_buffer_dirty() called from\nnilfs_segctor_do_construct() outputs a warning with some patterns after\nnilfs2 detects metadata corruption and degrades to read-only mode.\n\nAfter such read-only degeneration, page cache data may be cleared through\nnilfs_clear_dirty_page() which may also clear the uptodate flag for their\nbuffer heads. However, even after the degeneration, log writes are still\nperformed by unmount processing etc., which causes mark_buffer_dirty() to\nbe called for buffer heads without the \"uptodate\" flag and causes the\nwarning.\n\nSince any writes should not be done to a read-only file system in the\nfirst place, this fixes the warning in mark_buffer_dirty() by letting\nnilfs_segctor_do_construct() abort early if in read-only mode.\n\nThis also changes the retry check of nilfs_segctor_write_out() to avoid\nunnecessary log write retries if it detects -EROFS that\nnilfs_segctor_do_construct() returned.",
"id": "GHSA-jvhc-rq6w-32mx",
"modified": "2025-09-17T15:30:38Z",
"published": "2025-09-17T15:30:38Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-53337"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/13f73ef77baa4764dc1ca4fcbae9cade05b83866"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/28a65b49eb53e172d23567005465019658bfdb4d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4005cec6847c06ee191583270b7cdd7e696543cc"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4569a292a84e340e97d178898ad1cfe1a3080a61"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/55f7810632f993cff622a0ddbc7c865892294b61"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/7c3e662048053802f6b0db3a78e97f4e1f7edc4f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a73201c607d8e506358d60aafddda4246bdd9350"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/bd89073fc7a5d03b1d06b372addbe405e5a925f4"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e9c5412c5972124776c1b873533eb39e287a4dfa"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
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