ocfs2: fix possible deadlock between unlink and dio_end_io_write
In the Linux kernel, the following vulnerability has been resolved: ocfs2: fix possible deadlock between unlink and dio_end_io_write ocfs2_unlink takes orphan dir inode_lock first and then ip_alloc_sem, while in ocfs2_dio_end_io_write, it acquires these locks in reverse order. This creates an ABBA lock ordering violation on lock classes ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE] and ocfs2_file_ip_alloc_sem_key. Lock Chain #0 (orphan dir inode_lock -> ip_alloc_sem): ocfs2_unlink ocfs2_prepare_orphan_dir ocfs2_lookup_lock_orphan_dir inode_lock(orphan_dir_inode) <- lock A __ocfs2_prepare_orphan_dir ocfs2_prepare_dir_for_insert ocfs2_extend_dir ocfs2_expand_inline_dir down_write(&oi->ip_alloc_sem) <- Lock B Lock Chain #1 (ip_alloc_sem -> orphan dir inode_lock): ocfs2_dio_end_io_write down_write(&oi->ip_alloc_sem) <- Lock B ocfs2_del_inode_from_orphan() inode_lock(orphan_dir_inode) <- Lock A Deadlock Scenario: CPU0 (unlink) CPU1 (dio_end_io_write) ------ ------ inode_lock(orphan_dir_inode) down_write(ip_alloc_sem) down_write(ip_alloc_sem) inode_lock(orphan_dir_inode) Since ip_alloc_sem is to protect allocation changes, which is unrelated with operations in ocfs2_del_inode_from_orphan. So move ocfs2_del_inode_from_orphan out of ip_alloc_sem to fix the deadlock.
CVE-2026-31598
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-2026-31598
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": "a86a72a4a4e0ec109a98e2737948864ed6794bf7",
"lessThan": "297d8d7bb6a2bf133d3a3636edbdf94101cbd719",
"versionType": "git"
},
{
"status": "affected",
"version": "a86a72a4a4e0ec109a98e2737948864ed6794bf7",
"lessThan": "32630dee18c6bb2175c8a865a474749492eaf19c",
"versionType": "git"
},
{
"status": "affected",
"version": "a86a72a4a4e0ec109a98e2737948864ed6794bf7",
"lessThan": "93f35419eb84d58820040642cb6e7528fe4aba7a",
"versionType": "git"
},
{
"status": "affected",
"version": "a86a72a4a4e0ec109a98e2737948864ed6794bf7",
"lessThan": "4b80b5a838a32437f2cae0662578bac216a2c51a",
"versionType": "git"
},
{
"status": "affected",
"version": "a86a72a4a4e0ec109a98e2737948864ed6794bf7",
"lessThan": "2b884d52273c60c298bd570163e8053657bbaff6",
"versionType": "git"
},
{
"status": "affected",
"version": "a86a72a4a4e0ec109a98e2737948864ed6794bf7",
"lessThan": "bc0fb5c7d54c78be43a536df0e20dee32adb27d3",
"versionType": "git"
},
{
"status": "affected",
"version": "a86a72a4a4e0ec109a98e2737948864ed6794bf7",
"lessThan": "f9fb1a7b635849322e1d7b7b6b26389778ec8e82",
"versionType": "git"
},
{
"status": "affected",
"version": "a86a72a4a4e0ec109a98e2737948864ed6794bf7",
"lessThan": "e049f7a9bd80b7319590789ea5e1c523d6339d91",
"versionType": "git"
},
{
"status": "affected",
"version": "a86a72a4a4e0ec109a98e2737948864ed6794bf7",
"lessThan": "b02da26a992db0c0e2559acbda0fc48d4a2fd337",
"versionType": "git"
}
],
"programFiles": [
"fs/ocfs2/aops.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.6"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.6",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.258",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.209",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.175",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.136",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.83",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.24",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "6.19.14",
"versionType": "semver",
"lessThanOrEqual": "6.19.*"
},
{
"status": "unaffected",
"version": "7.0.1",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/ocfs2/aops.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-31598
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #39927 · Revision 1
- Added to Heist Feed
- Publisher date