CVE-2024-27036
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2024-27036
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-27036.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2024-27036
- Downstream
- Related
- Published
- 2024-05-01T12:53:46Z
- Modified
- 2025-10-15T10:22:14.385286Z
- Summary
- cifs: Fix writeback data corruption
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
cifs: Fix writeback data corruption
cifs writeback doesn't correctly handle the case where cifsextendwriteback() hits a point where it is considering an additional folio, but this would overrun the wsize - at which point it drops out of the xarray scanning loop and calls xaspause(). The problem is that xaspause() advances the loop counter - thereby skipping that page.
What needs to happen is for xas_reset() to be called any time we decide we don't want to process the page we're looking at, but rather send the request we are building and start a new one.
Fix this by copying and adapting the netfslib writepages code as a temporary measure, with cifs writeback intending to be offloaded to netfslib in the near future.
This also fixes the issue with the use of filemapgetfolios_tag() causing retry of a bunch of pages which the extender already dealt with.
This can be tested by creating, say, a 64K file somewhere not on cifs (otherwise copy-offload may get underfoot), mounting a cifs share with a wsize of 64000, copying the file to it and then comparing the original file and the copy:
dd if=/dev/urandom of=/tmp/64K bs=64k count=1 mount //192.168.6.1/test /mnt -o user=...,pass=...,wsize=64000 cp /tmp/64K /mnt/64K cmp /tmp/64K /mnt/64KWithout the fix, the cmp fails at position 64000 (or shortly thereafter).
- References
-
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/65f2ced695982ccd516196d0a9447d85dbe2eed5
- https://git.kernel.org/stable/c/844b4e132f57f1333dc79feaa035075a096762e4
- https://git.kernel.org/stable/c/e45deec35bf7f1f4f992a707b2d04a8c162f2240
- https://git.kernel.org/stable/c/f3dc1bdb6b0b0693562c7c54a6c28bafa608ba3c
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
-
Introducedd08089f649a0cfb2099c8551ac47eef0cc23fdf2Fixede45deec35bf7f1f4f992a707b2d04a8c162f2240
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedd08089f649a0cfb2099c8551ac47eef0cc23fdf2Fixed65f2ced695982ccd516196d0a9447d85dbe2eed5
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedd08089f649a0cfb2099c8551ac47eef0cc23fdf2Fixed844b4e132f57f1333dc79feaa035075a096762e4
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedd08089f649a0cfb2099c8551ac47eef0cc23fdf2Fixedf3dc1bdb6b0b0693562c7c54a6c28bafa608ba3c
Affected versions
v6.*
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
v6.6.3
v6.6.4
v6.6.5
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
v6.7.1
v6.7.10
v6.7.2
v6.7.3
v6.7.4
v6.7.5
v6.7.6
v6.7.7
v6.7.8
v6.7.9
v6.8
v6.8-rc1
v6.8-rc2
v6.8-rc3
v6.8-rc4
v6.8-rc5
v6.8-rc6
v6.8-rc7
v6.8.1
Database specific
{
"vanir_signatures": [
{
"id": "CVE-2024-27036-19ff914a",
"signature_type": "Function",
"target": {
"file": "fs/smb/client/file.c",
"function": "cifs_write_back_from_locked_folio"
},
"deprecated": false,
"digest": {
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"function_hash": "180612515093711634578772645523016860257"
},
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"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@844b4e132f57f1333dc79feaa035075a096762e4"
},
{
"id": "CVE-2024-27036-22a8d570",
"signature_type": "Function",
"target": {
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"function": "cifs_writepages_region"
},
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"digest": {
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"function_hash": "101136209679115478543626818322220697563"
},
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"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@e45deec35bf7f1f4f992a707b2d04a8c162f2240"
},
{
"id": "CVE-2024-27036-3b933af8",
"signature_type": "Line",
"target": {
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{
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"target": {
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},
{
"id": "CVE-2024-27036-64f00d24",
"signature_type": "Function",
"target": {
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"function": "cifs_extend_writeback"
},
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{
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"target": {
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},
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},
{
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