gfs2: fix memory leaks in gfs2_fill_super error path
In the Linux kernel, the following vulnerability has been resolved: gfs2: fix memory leaks in gfs2_fill_super error path Fix two memory leaks in the gfs2_fill_super() error handling path when transitioning a filesystem to read-write mode fails. First leak: kthread objects (thread_struct, task_struct, etc.) When gfs2_freeze_lock_shared() fails after init_threads() succeeds, the created kernel threads (logd and quotad) are never destroyed. This occurs because the fail_per_node label doesn't call gfs2_destroy_threads(). Second leak: quota bitmap buffer (8192 bytes) When gfs2_make_fs_rw() fails after gfs2_quota_init() succeeds but before other operations complete, the allocated quota bitmap is never freed. The fix moves thread cleanup to the fail_per_node label to handle all error paths uniformly. gfs2_destroy_threads() is safe to call unconditionally as it checks for NULL pointers. Quota cleanup is added in gfs2_make_fs_rw() to properly handle the withdrawal case where quota initialization succeeds but the filesystem is then withdrawn. Thread leak backtrace (gfs2_freeze_lock_shared failure): unreferenced object 0xffff88801d7bca80 (size 4480): copy_process+0x3a1/0x4670 kernel/fork.c:2422 kernel_clone+0xf3/0x6e0 kernel/fork.c:2779 kthread_create_on_node+0x100/0x150 kernel/kthread.c:478 init_threads+0xab/0x350 fs/gfs2/ops_fstype.c:611 gfs2_fill_super+0xe5c/0x1240 fs/gfs2/ops_fstype.c:1265 Quota leak backtrace (gfs2_make_fs_rw failure): unreferenced object 0xffff88812de7c000 (size 8
CVE-2026-45961
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-45961
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "b66f723bb552ad59c2acb5d45ea45c890f84498b",
"lessThan": "4db5e4c8f1103b21005ab9e7fe9a5d2554438b74",
"versionType": "git"
},
{
"status": "affected",
"version": "b66f723bb552ad59c2acb5d45ea45c890f84498b",
"lessThan": "d049ba2c1723110f82227eaf521427980811169b",
"versionType": "git"
},
{
"status": "affected",
"version": "b66f723bb552ad59c2acb5d45ea45c890f84498b",
"lessThan": "4456be93464a599eac0eb2afa63b5d662e1599d8",
"versionType": "git"
},
{
"status": "affected",
"version": "b66f723bb552ad59c2acb5d45ea45c890f84498b",
"lessThan": "e54229ecf49add8451d5f765a32c86ab4446e06c",
"versionType": "git"
},
{
"status": "affected",
"version": "b66f723bb552ad59c2acb5d45ea45c890f84498b",
"lessThan": "da6f5bbc2e7902f578b503f2a4c3d8d09ca4b102",
"versionType": "git"
},
{
"status": "affected",
"version": "2f8623377f3e0cfaa80558631b8694d02a492b4c",
"versionType": "git"
},
{
"status": "affected",
"version": "c713ebf2fe3f469e4af4de60a3427689ffb7c5d7",
"versionType": "git"
},
{
"status": "affected",
"version": "c2191e507147b1a22e9170ebb2aaa0f2902fcbfa",
"versionType": "git"
},
{
"status": "affected",
"version": "9fc32dad3cdba18669c71893f3e6d96905b39b3f",
"versionType": "git"
},
{
"status": "affected",
"version": "5.10.173",
"lessThan": "5.11",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.15.99",
"lessThan": "5.16",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.1.16",
"lessThan": "6.2",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.2.3",
"lessThan": "6.3",
"versionType": "semver"
}
],
"programFiles": [
"fs/gfs2/ops_fstype.c",
"fs/gfs2/super.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.3"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.3",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.114",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.57",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "6.19.4",
"versionType": "semver",
"lessThanOrEqual": "6.19.*"
},
{
"status": "unaffected",
"version": "7.0",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/gfs2/ops_fstype.c",
"fs/gfs2/super.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-45961
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #46317 · Revision 1
- Added to Heist Feed
- Publisher date