ghsa-ffg2-pg2r-fw6w
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
btrfs: fix race between quota enable and quota rescan ioctl
When enabling quotas, at btrfs_quota_enable(), after committing the transaction, we change fs_info->quota_root to point to the quota root we created and set BTRFS_FS_QUOTA_ENABLED at fs_info->flags. Then we try to start the qgroup rescan worker, first by initializing it with a call to qgroup_rescan_init() - however if that fails we end up freeing the quota root but we leave fs_info->quota_root still pointing to it, this can later result in a use-after-free somewhere else.
We have previously set the flags BTRFS_FS_QUOTA_ENABLED and BTRFS_QGROUP_STATUS_FLAG_ON, so we can only fail with -EINPROGRESS at btrfs_quota_enable(), which is possible if someone already called the quota rescan ioctl, and therefore started the rescan worker.
So fix this by ignoring an -EINPROGRESS and asserting we can't get any other error.
{
"affected": [],
"aliases": [
"CVE-2022-50379"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-09-18T14:15:36Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix race between quota enable and quota rescan ioctl\n\nWhen enabling quotas, at btrfs_quota_enable(), after committing the\ntransaction, we change fs_info-\u003equota_root to point to the quota root we\ncreated and set BTRFS_FS_QUOTA_ENABLED at fs_info-\u003eflags. Then we try\nto start the qgroup rescan worker, first by initializing it with a call\nto qgroup_rescan_init() - however if that fails we end up freeing the\nquota root but we leave fs_info-\u003equota_root still pointing to it, this\ncan later result in a use-after-free somewhere else.\n\nWe have previously set the flags BTRFS_FS_QUOTA_ENABLED and\nBTRFS_QGROUP_STATUS_FLAG_ON, so we can only fail with -EINPROGRESS at\nbtrfs_quota_enable(), which is possible if someone already called the\nquota rescan ioctl, and therefore started the rescan worker.\n\nSo fix this by ignoring an -EINPROGRESS and asserting we can\u0027t get any\nother error.",
"id": "GHSA-ffg2-pg2r-fw6w",
"modified": "2025-09-18T15:30:32Z",
"published": "2025-09-18T15:30:32Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-50379"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0efd9dfc00d677a1d0929319a6103cb2dfc41c22"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/26b7c0ac49a3eea15559c9d84863736a6d1164b4"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/331cd9461412e103d07595a10289de90004ac890"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/47b5ffe86332af95f0f52be0a63d4da7c2b37b55"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4b996a3014ef014af8f97b60c35f5289210a4720"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6c22f86dd221eba0c7af645b1af73dcbc04ee27b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c97f6d528c3f1c83a6b792a8a7928c236c80b8fe"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.