GHSA-FC9X-C3WJ-JF8G
Vulnerability from github – Published: 2026-09-17 18:32 – Updated: 2026-09-17 18:32In the Linux kernel, the following vulnerability has been resolved:
nilfs2: fix infinite loop in nilfs_clean_segments()
syzbot reported a hung task in nilfs_transaction_begin(). This occurs because the cleaner ioctl falls into an infinite loop if nilfs_segctor_construct() repeatedly returns -EROFS (e.g. the device is remounted as read-only after an I/O error).
Currently in nilfs_clean_segments(), if err is non-zero, it logs the error and sleeps but doesn't abort when it encounters a terminal error like -EROFS. This causes the thread to loop forever.
Fix this by breaking out of the loop if nilfs_segctor_construct() returns -EROFS. This matches the behaviour in nilfs_segctor_write_out(), which also handles -EROFS.
{
"affected": [],
"aliases": [
"CVE-2026-90420"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-17T17:17:46Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnilfs2: fix infinite loop in nilfs_clean_segments()\n\nsyzbot reported a hung task in nilfs_transaction_begin(). This occurs\nbecause the cleaner ioctl falls into an infinite loop if\nnilfs_segctor_construct() repeatedly returns -EROFS (e.g. the device\nis remounted as read-only after an I/O error).\n\nCurrently in nilfs_clean_segments(), if err is non-zero, it logs the\nerror and sleeps but doesn\u0027t abort when it encounters a terminal error\nlike -EROFS. This causes the thread to loop forever.\n\nFix this by breaking out of the loop if nilfs_segctor_construct()\nreturns -EROFS. This matches the behaviour in\nnilfs_segctor_write_out(), which also handles -EROFS.",
"id": "GHSA-fc9x-c3wj-jf8g",
"modified": "2026-09-17T18:32:05Z",
"published": "2026-09-17T18:32:04Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90420"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1fc6df85b4954b6fda9c351843aaca3c06f66d8d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/217b967ad7887a3e1ebc08f46f6484e081acd4b4"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3bcdbdaac884a4baa59716cf9bd9470c75276e2d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8cea0bc78ac64cb88da49c07f80bf2cf9fb7aff8"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c07e5ad6539e7e9350d5c65cbf8adb69d1711b15"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ce5a5ad1a8330a2fcfdd9ec2ab341be739e89a18"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d7afca8e4efbf4c455b4663c29ae59fde2f1b671"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e3e9367dae1a6392cbb14ab0b2ab5edbf39735c3"
}
],
"schema_version": "1.4.0",
"severity": []
}
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