nilfs2: do not force clear folio if buffer is referenced
In the Linux kernel, the following vulnerability has been resolved: nilfs2: do not force clear folio if buffer is referenced Patch series "nilfs2: protect busy buffer heads from being force-cleared". This series fixes the buffer head state inconsistency issues reported by syzbot that occurs when the filesystem is corrupted and falls back to read-only, and the associated buffer head use-after-free issue. This patch (of 2): Syzbot has reported that after nilfs2 detects filesystem corruption and falls back to read-only, inconsistencies in the buffer state may occur. One of the inconsistencies is that when nilfs2 calls mark_buffer_dirty() to set a data or metadata buffer as dirty, but it detects that the buffer is not in the uptodate state: WARNING: CPU: 0 PID: 6049 at fs/buffer.c:1177 mark_buffer_dirty+0x2e5/0x520 fs/buffer.c:1177 ... Call Trace: nilfs_palloc_commit_alloc_entry+0x4b/0x160 fs/nilfs2/alloc.c:598 nilfs_ifile_create_inode+0x1dd/0x3a0 fs/nilfs2/ifile.c:73 nilfs_new_inode+0x254/0x830 fs/nilfs2/inode.c:344 nilfs_mkdir+0x10d/0x340 fs/nilfs2/namei.c:218 vfs_mkdir+0x2f9/0x4f0 fs/namei.c:4257 do_mkdirat+0x264/0x3a0 fs/namei.c:4280 __do_sys_mkdirat fs/namei.c:4295 [inline] __se_sys_mkdirat fs/namei.c:4293 [inline] __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4293 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The other is when nilfs_btree_propagate(), which propagates the dirty state
CVE-2025-21722
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-2025-21722
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": "8c26c4e2694a163d525976e804d81cd955bbb40c",
"lessThan": "7d0544bacc11d6aa26ecd7debf9353193c7a3328",
"versionType": "git"
},
{
"status": "affected",
"version": "8c26c4e2694a163d525976e804d81cd955bbb40c",
"lessThan": "4d042811c72f71be7c14726db2c72b67025a7cb5",
"versionType": "git"
},
{
"status": "affected",
"version": "8c26c4e2694a163d525976e804d81cd955bbb40c",
"lessThan": "f51ff43c4c5a6c8e72d0aca89e4d5e688938412f",
"versionType": "git"
},
{
"status": "affected",
"version": "8c26c4e2694a163d525976e804d81cd955bbb40c",
"lessThan": "19296737024cd220a1d6590bf4c092bca8c99497",
"versionType": "git"
},
{
"status": "affected",
"version": "8c26c4e2694a163d525976e804d81cd955bbb40c",
"lessThan": "8458c686d50a804611b97038dd6e75a474ac2221",
"versionType": "git"
},
{
"status": "affected",
"version": "8c26c4e2694a163d525976e804d81cd955bbb40c",
"lessThan": "1098bb8d52419d262a3358d099a1598a920b730f",
"versionType": "git"
},
{
"status": "affected",
"version": "8c26c4e2694a163d525976e804d81cd955bbb40c",
"lessThan": "557ccf5e49f1fb848a29698585bcab2e50a597ef",
"versionType": "git"
},
{
"status": "affected",
"version": "8c26c4e2694a163d525976e804d81cd955bbb40c",
"lessThan": "ca76bb226bf47ff04c782cacbd299f12ddee1ec1",
"versionType": "git"
}
],
"programFiles": [
"fs/nilfs2/page.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.10"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.10",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.4.291",
"versionType": "semver",
"lessThanOrEqual": "5.4.*"
},
{
"status": "unaffected",
"version": "5.10.235",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.179",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.129",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.13",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.13.2",
"versionType": "semver",
"lessThanOrEqual": "6.13.*"
},
{
"status": "unaffected",
"version": "6.14",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/nilfs2/page.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2025-21722
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #45942 · Revision 1
- Added to Heist Feed
- Publisher date