ceph: fix crash after fscrypt_encrypt_pagecache_blocks() error
In the Linux kernel, the following vulnerability has been resolved: ceph: fix crash after fscrypt_encrypt_pagecache_blocks() error The function move_dirty_folio_in_page_array() was created by commit ce80b76dd327 ("ceph: introduce ceph_process_folio_batch() method") by moving code from ceph_writepages_start() to this function. This new function is supposed to return an error code which is checked by the caller (now ceph_process_folio_batch()), and on error, the caller invokes redirty_page_for_writepage() and then breaks from the loop. However, the refactoring commit has gone wrong, and it by accident, it always returns 0 (= success) because it first NULLs the pointer and then returns PTR_ERR(NULL) which is always 0. This means errors are silently ignored, leaving NULL entries in the page array, which may later crash the kernel. The simple solution is to call PTR_ERR() before clearing the pointer.
CVE-2025-39878
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-2025-39878
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": "0f2b2b7cacf888229cec19126e6791b11fb35f32",
"lessThan": "4a918f04cf97b2436a8dfe5cb51bb33f8e8831f4",
"versionType": "git"
},
{
"status": "affected",
"version": "ce80b76dd32764cc914975777e058d4fae4f0ea0",
"lessThan": "dd1616ecbea920d228c56729461ed223cc501425",
"versionType": "git"
},
{
"status": "affected",
"version": "ce80b76dd32764cc914975777e058d4fae4f0ea0",
"lessThan": "249e0a47cdb46bb9eae65511c569044bd8698d7d",
"versionType": "git"
}
],
"programFiles": [
"fs/ceph/addr.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.15"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.15",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.16.8",
"versionType": "semver",
"lessThanOrEqual": "6.16.*"
},
{
"status": "unaffected",
"version": "6.17",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/ceph/addr.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2025-39878
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #46027 · Revision 1
- Added to Heist Feed
- Publisher date