ocfs2: cluster: don't sleep while holding o2hb_live_lock in o2hb_region_pin()
In the Linux kernel, the following vulnerability has been resolved: ocfs2: cluster: don't sleep while holding o2hb_live_lock in o2hb_region_pin() Patch series "ocfs2: cluster: o2hb_region_pin() fixes", v2. This series fixes three related issues in o2hb_region_pin(), all are from the original implementation in commit: 58a3158a5d17 ("ocfs2/cluster: Pin/unpin o2hb regions"): 1) It is called with o2hb_live_lock (a spinlock) held, but the underlying configfs_depend_item() sleeps (takes inode rwsem and pins the filesystem). This triggers BUG under CONFIG_DEBUG_ATOMIC_SLEEP. 2) When called from the configfs drop_item callback, it creates a lock order inversion: parent inode_lock -> configfs root inode_lock, which can deadlock against subsystem unregistration paths taking root -> parent. 3) If pinning fails partway through o2hb_region_inc_user(), the o2hb_dependent_users counter is leaked and partially-pinned regions are never released, leaving heartbeat regions unprotected on subsequent mounts. Patch 1 reworks o2hb_region_pin() to drop o2hb_live_lock across each sleeping configfs_depend_item() call, using a config_item reference to keep the region alive while unlocked. Patch 2 adds a from_callback parameter to select configfs_depend_item_unlocked() when called from configfs context, avoiding the inode_lock nesting. Patch 3 fixes the error path in o2hb_region_inc_user() to unpin and decrement the counter on failure. This patch (of 3): o2hb_region_pin() is always called with the o2hb_
CVE-2026-89491
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-2026-89491
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": "58a3158a5d17ddf4894db9e8ccaf92093ff8e42e",
"lessThan": "4d64f8da82fb9e8dbd5aa9b64c9bb6ac0decea03",
"versionType": "git"
},
{
"status": "affected",
"version": "58a3158a5d17ddf4894db9e8ccaf92093ff8e42e",
"lessThan": "3b790774280a610f8bdbd5d4260a07345bcf8e04",
"versionType": "git"
},
{
"status": "affected",
"version": "58a3158a5d17ddf4894db9e8ccaf92093ff8e42e",
"lessThan": "0cbc2f20a6ea7b4a59efa9171b7c694cdd196507",
"versionType": "git"
},
{
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"lessThan": "c9be4de77f97f383b750698e1517fd296041f4bb",
"versionType": "git"
},
{
"status": "affected",
"version": "58a3158a5d17ddf4894db9e8ccaf92093ff8e42e",
"lessThan": "49002acc520c61002ad195894ac391c94317d3ba",
"versionType": "git"
},
{
"status": "affected",
"version": "58a3158a5d17ddf4894db9e8ccaf92093ff8e42e",
"lessThan": "ce035f208d68b812d83e5482980f2b1c88a9cd94",
"versionType": "git"
},
{
"status": "affected",
"version": "58a3158a5d17ddf4894db9e8ccaf92093ff8e42e",
"lessThan": "470212a5eefabcc16b8e2f7fe2844b8737fe571c",
"versionType": "git"
},
{
"status": "affected",
"version": "58a3158a5d17ddf4894db9e8ccaf92093ff8e42e",
"lessThan": "af09df89db9a68a1d76df0f75667998135bc8d65",
"versionType": "git"
}
],
"programFiles": [
"fs/ocfs2/cluster/heartbeat.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.38"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.38",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.270",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.221",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.188",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.109",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.50",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.4",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/ocfs2/cluster/heartbeat.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-89491
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #35019 · Revision 1
- Added to Heist Feed
- Publisher date