CVE-2024-49870
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2024-49870
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-49870.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2024-49870
- Downstream
- Related
- Published
- 2024-10-21T18:01:12.048Z
- Modified
- 2025-11-20T06:42:55.273994Z
- Summary
- cachefiles: fix dentry leak in cachefiles_open_file()
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
cachefiles: fix dentry leak in cachefilesopenfile()
A dentry leak may be caused when a lookup cookie and a cull are concurrent:
P1 | P2
cachefileslookupcookie cachefileslookupobject lookuponepositiveunlocked // get dentry cachefilescull inode->iflags |= SKERNELFILE; cachefilesopenfile cachefilesmarkinodeinuse _cachefilesmarkinodeinuse canuse = false if (!(inode->iflags & SKERNELFILE)) canuse = true return false return false // Returns an error but doesn't put dentry
After that the following WARNING will be triggered when the backend folder is umounted:
================================================================== BUG: Dentry 000000008ad87947{i=7a,n=Dx11.img} still in use (1) [unmount of ext4 sda] WARNING: CPU: 4 PID: 359261 at fs/dcache.c:1767 umountcheck+0x5d/0x70 CPU: 4 PID: 359261 Comm: umount Not tainted 6.6.0-dirty #25 RIP: 0010:umountcheck+0x5d/0x70 Call Trace: <TASK> dwalk+0xda/0x2b0 doonetree+0x20/0x40 shrinkdcacheforumount+0x2c/0x90 genericshutdownsuper+0x20/0x160 killblocksuper+0x1a/0x40 ext4killsb+0x22/0x40 deactivatelockedsuper+0x35/0x80
cleanup_mnt+0x104/0x160
Whether cachefilesopenfile() returns true or false, the reference count obtained by lookuppositiveunlocked() in cachefileslookup_object() should be released.
Therefore release that reference count in cachefileslookup_object() to fix the above issue and simplify the code.
- References
-
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/7fa2382f97421978514a419c93054eca69f5247b
- https://git.kernel.org/stable/c/c7d10fa7d7691558ff967668494672415f5fa151
- https://git.kernel.org/stable/c/d32ff64c872d7e08e893c32ba6a2374583444410
- https://git.kernel.org/stable/c/da6ef2dffe6056aad3435e6cf7c6471c2a62187c
- https://git.kernel.org/stable/c/e4a28489b310339b2b8187bec0a437709be551c1
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced1f08c925e7a38002bde509e66f6f891468848511Fixedd32ff64c872d7e08e893c32ba6a2374583444410
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced1f08c925e7a38002bde509e66f6f891468848511Fixedc7d10fa7d7691558ff967668494672415f5fa151
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced1f08c925e7a38002bde509e66f6f891468848511Fixede4a28489b310339b2b8187bec0a437709be551c1
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced1f08c925e7a38002bde509e66f6f891468848511Fixed7fa2382f97421978514a419c93054eca69f5247b
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced1f08c925e7a38002bde509e66f6f891468848511Fixedda6ef2dffe6056aad3435e6cf7c6471c2a62187c
Affected versions
v5.*
v5.16
v5.16-rc5
v5.16-rc6
v5.16-rc7
v5.16-rc8
v5.17
v5.17-rc1
v5.17-rc2
v5.17-rc3
v5.17-rc4
v5.17-rc5
v5.17-rc6
v5.17-rc7
v5.17-rc8
v5.18
v5.18-rc1
v5.18-rc2
v5.18-rc3
v5.18-rc4
v5.18-rc5
v5.18-rc6
v5.18-rc7
v5.19
v5.19-rc1
v5.19-rc2
v5.19-rc3
v5.19-rc4
v5.19-rc5
v5.19-rc6
v5.19-rc7
v5.19-rc8
v6.*
v6.0
v6.0-rc1
v6.0-rc2
v6.0-rc3
v6.0-rc4
v6.0-rc5
v6.0-rc6
v6.0-rc7
v6.1
v6.1-rc1
v6.1-rc2
v6.1-rc3
v6.1-rc4
v6.1-rc5
v6.1-rc6
v6.1-rc7
v6.1-rc8
v6.1.1
v6.1.10
v6.1.100
v6.1.101
v6.1.102
v6.1.103
v6.1.104
v6.1.105
v6.1.106
v6.1.107
v6.1.108
v6.1.109
v6.1.11
v6.1.110
v6.1.111
v6.1.112
v6.1.12
v6.1.13
v6.1.14
v6.1.15
v6.1.16
v6.1.17
v6.1.18
v6.1.19
v6.1.2
v6.1.20
v6.1.21
v6.1.22
v6.1.23
v6.1.24
v6.1.25
v6.1.26
v6.1.27
v6.1.28
v6.1.29
v6.1.3
v6.1.30
v6.1.31
v6.1.32
v6.1.33
v6.1.34
v6.1.35
v6.1.36
v6.1.37
v6.1.38
v6.1.39
v6.1.4
v6.1.40
v6.1.41
v6.1.42
v6.1.43
v6.1.44
v6.1.45
v6.1.46
v6.1.47
v6.1.48
v6.1.49
v6.1.5
v6.1.50
v6.1.51
v6.1.52
v6.1.53
v6.1.54
v6.1.55
v6.1.56
v6.1.57
v6.1.58
v6.1.59
v6.1.6
v6.1.60
v6.1.61
v6.1.62
v6.1.63
v6.1.64
v6.1.65
v6.1.66
v6.1.67
v6.1.68
v6.1.69
v6.1.7
v6.1.70
v6.1.71
v6.1.72
v6.1.73
v6.1.74
v6.1.75
v6.1.76
v6.1.77
v6.1.78
v6.1.79
v6.1.8
v6.1.80
v6.1.81
v6.1.82
v6.1.83
v6.1.84
v6.1.85
v6.1.86
v6.1.87
v6.1.88
v6.1.89
v6.1.9
v6.1.90
v6.1.91
v6.1.92
v6.1.93
v6.1.94
v6.1.95
v6.1.96
v6.1.97
v6.1.98
v6.1.99
v6.10
v6.10-rc1
v6.10-rc2
v6.10-rc3
v6.10-rc4
v6.10-rc5
v6.10-rc6
v6.10-rc7
v6.10.1
v6.10.10
v6.10.11
v6.10.12
v6.10.13
v6.10.2
v6.10.3
v6.10.4
v6.10.5
v6.10.6
v6.10.7
v6.10.8
v6.10.9
v6.11
v6.11-rc1
v6.11-rc2
v6.11-rc3
v6.11-rc4
v6.11-rc5
v6.11-rc6
v6.11-rc7
v6.11.1
v6.11.2
v6.2
v6.2-rc1
v6.2-rc2
v6.2-rc3
v6.2-rc4
v6.2-rc5
v6.2-rc6
v6.2-rc7
v6.2-rc8
v6.3
v6.3-rc1
v6.3-rc2
v6.3-rc3
v6.3-rc4
v6.3-rc5
v6.3-rc6
v6.3-rc7
v6.4
v6.4-rc1
v6.4-rc2
v6.4-rc3
v6.4-rc4
v6.4-rc5
v6.4-rc6
v6.4-rc7
v6.5
v6.5-rc1
v6.5-rc2
v6.5-rc3
v6.5-rc4
v6.5-rc5
v6.5-rc6
v6.5-rc7
v6.6
v6.6-rc1
v6.6-rc2
v6.6-rc3
v6.6-rc4
v6.6-rc5
v6.6-rc6
v6.6-rc7
v6.6.1
v6.6.10
v6.6.11
v6.6.12
v6.6.13
v6.6.14
v6.6.15
v6.6.16
v6.6.17
v6.6.18
v6.6.19
v6.6.2
v6.6.20
v6.6.21
v6.6.22
v6.6.23
v6.6.24
v6.6.25
v6.6.26
v6.6.27
v6.6.28
v6.6.29
v6.6.3
v6.6.30
v6.6.31
v6.6.32
v6.6.33
v6.6.34
v6.6.35
v6.6.36
v6.6.37
v6.6.38
v6.6.39
v6.6.4
v6.6.40
v6.6.41
v6.6.42
v6.6.43
v6.6.44
v6.6.45
v6.6.46
v6.6.47
v6.6.48
v6.6.49
v6.6.5
v6.6.50
v6.6.51
v6.6.52
v6.6.53
v6.6.54
v6.6.6
v6.6.7
v6.6.8
v6.6.9
v6.7
v6.7-rc1
v6.7-rc2
v6.7-rc3
v6.7-rc4
v6.7-rc5
v6.7-rc6
v6.7-rc7
v6.7-rc8
v6.8
v6.8-rc1
v6.8-rc2
v6.8-rc3
v6.8-rc4
v6.8-rc5
v6.8-rc6
v6.8-rc7
v6.9
v6.9-rc1
v6.9-rc2
v6.9-rc3
v6.9-rc4
v6.9-rc5
v6.9-rc6
v6.9-rc7
Database specific
vanir_signatures
[
{
"signature_type": "Line",
"deprecated": false,
"target": {
"file": "fs/cachefiles/namei.c"
},
"signature_version": "v1",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@d32ff64c872d7e08e893c32ba6a2374583444410",
"digest": {
"line_hashes": [
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"146292177689228895750409325692046269822",
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"257014457188919713860710861773597505881",
"62174885154205320896154947983263837522",
"307603371016444213663599617590596743622",
"306105880335544998929723260763676608967"
],
"threshold": 0.9
},
"id": "CVE-2024-49870-099e0f52"
},
{
"signature_type": "Function",
"deprecated": false,
"target": {
"file": "fs/cachefiles/namei.c",
"function": "cachefiles_look_up_object"
},
"signature_version": "v1",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@7fa2382f97421978514a419c93054eca69f5247b",
"digest": {
"length": 1020.0,
"function_hash": "36551789086859408623984130529958312962"
},
"id": "CVE-2024-49870-18a222f5"
},
{
"signature_type": "Line",
"deprecated": false,
"target": {
"file": "fs/cachefiles/namei.c"
},
"signature_version": "v1",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@da6ef2dffe6056aad3435e6cf7c6471c2a62187c",
"digest": {
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"307603371016444213663599617590596743622",
"306105880335544998929723260763676608967"
],
"threshold": 0.9
},
"id": "CVE-2024-49870-1de9ddaa"
},
{
"signature_type": "Function",
"deprecated": false,
"target": {
"file": "fs/cachefiles/namei.c",
"function": "cachefiles_open_file"
},
"signature_version": "v1",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@c7d10fa7d7691558ff967668494672415f5fa151",
"digest": {
"length": 1430.0,
"function_hash": "266992675700433920436753810638774304434"
},
"id": "CVE-2024-49870-2454032e"
},
{
"signature_type": "Function",
"deprecated": false,
"target": {
"file": "fs/cachefiles/namei.c",
"function": "cachefiles_open_file"
},
"signature_version": "v1",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@d32ff64c872d7e08e893c32ba6a2374583444410",
"digest": {
"length": 1430.0,
"function_hash": "266992675700433920436753810638774304434"
},
"id": "CVE-2024-49870-2e454ce5"
},
{
"signature_type": "Function",
"deprecated": false,
"target": {
"file": "fs/cachefiles/namei.c",
"function": "cachefiles_open_file"
},
"signature_version": "v1",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@7fa2382f97421978514a419c93054eca69f5247b",
"digest": {
"length": 1409.0,
"function_hash": "290926674883235186641557839098618271516"
},
"id": "CVE-2024-49870-39e573ff"
},
{
"signature_type": "Function",
"deprecated": false,
"target": {
"file": "fs/cachefiles/namei.c",
"function": "cachefiles_look_up_object"
},
"signature_version": "v1",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@c7d10fa7d7691558ff967668494672415f5fa151",
"digest": {
"length": 1020.0,
"function_hash": "36551789086859408623984130529958312962"
},
"id": "CVE-2024-49870-3dd83759"
},
{
"signature_type": "Function",
"deprecated": false,
"target": {
"file": "fs/cachefiles/namei.c",
"function": "cachefiles_look_up_object"
},
"signature_version": "v1",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@d32ff64c872d7e08e893c32ba6a2374583444410",
"digest": {
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"function_hash": "36551789086859408623984130529958312962"
},
"id": "CVE-2024-49870-470ca0a6"
},
{
"signature_type": "Line",
"deprecated": false,
"target": {
"file": "fs/cachefiles/namei.c"
},
"signature_version": "v1",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@c7d10fa7d7691558ff967668494672415f5fa151",
"digest": {
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],
"threshold": 0.9
},
"id": "CVE-2024-49870-7e1e3dac"
},
{
"signature_type": "Function",
"deprecated": false,
"target": {
"file": "fs/cachefiles/namei.c",
"function": "cachefiles_look_up_object"
},
"signature_version": "v1",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@da6ef2dffe6056aad3435e6cf7c6471c2a62187c",
"digest": {
"length": 1020.0,
"function_hash": "36551789086859408623984130529958312962"
},
"id": "CVE-2024-49870-9f4a32ba"
},
{
"signature_type": "Line",
"deprecated": false,
"target": {
"file": "fs/cachefiles/namei.c"
},
"signature_version": "v1",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@7fa2382f97421978514a419c93054eca69f5247b",
"digest": {
"line_hashes": [
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],
"threshold": 0.9
},
"id": "CVE-2024-49870-b3831d6c"
},
{
"signature_type": "Function",
"deprecated": false,
"target": {
"file": "fs/cachefiles/namei.c",
"function": "cachefiles_open_file"
},
"signature_version": "v1",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@da6ef2dffe6056aad3435e6cf7c6471c2a62187c",
"digest": {
"length": 1409.0,
"function_hash": "290926674883235186641557839098618271516"
},
"id": "CVE-2024-49870-d67f9439"
}
]