Bug 2049700 (CVE-2022-0480)
| Summary: | CVE-2022-0480 kernel: memcg does not limit the number of POSIX file locks allowing memory exhaustion | ||
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| Product: | [Other] Security Response | Reporter: | Guilherme de Almeida Suckevicz <gsuckevi> |
| Component: | vulnerability | Assignee: | Nobody <nobody> |
| Status: | NEW --- | QA Contact: | |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | unspecified | CC: | acaringi, adscvr, airlied, alciregi, bdettelb, bhu, chwhite, crwood, dvlasenk, eshatokhin, hdegoede, hkrzesin, jarod, jarodwilson, jburrell, jeremy, jfaracco, jforbes, jglisse, jlelli, joe.lawrence, jonathan, josef, jshortt, jstancek, jwboyer, kcarcia, kernel-maint, kernel-mgr, lgoncalv, linville, lzampier, masami256, mchehab, nmurray, ptalbert, qzhao, rkeshri, rvrbovsk, scweaver, steved, vkumar, walters, williams |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |
| Doc Text: |
A flaw was found in the filelock_init in fs/locks.c function in the Linux kernel. This issue can lead to host memory exhaustion due to memcg not limiting the number of Portable Operating System Interface (POSIX) file locks.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | Type: | --- | |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | 2049708, 2051677, 2051678, 2066600, 2066601, 2209993, 2209994, 2209995, 2209996, 2209997, 2209998 | ||
| Bug Blocks: | 2040774, 2049704 | ||
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Description
Guilherme de Almeida Suckevicz
2022-02-02 14:56:23 UTC
Created kernel tracking bugs for this issue: Affects: fedora-all [bug 2049708] Marking Services notaffected per kernel analysis. This was fixed for Fedora with the 5.15.x stable kernel rebases. Upstream has revered the fix with the following details:
***
commit 3754707bcc3e190e5dadc978d172b61e809cb3bd
Author: Linus Torvalds <torvalds>
Date: Tue Sep 7 11:21:48 2021 -0700
Revert "memcg: enable accounting for file lock caches"
This reverts commit 0f12156dff2862ac54235fc72703f18770769042.
The kernel test robot reports a sizeable performance regression for this
commit, and while it clearly does the rigth thing in theory, we'll need
to look at just how to avoid or minimize the performance overhead of the
memcg accounting.
People already have suggestions on how to do that, but it's "future
work".
So revert it for now.
Link: https://lore.kernel.org/lkml/20210907150757.GE17617@xsang-OptiPlex-9020/
Acked-by: Jens Axboe <axboe>
Acked-by: Shakeel Butt <shakeelb>
Acked-by: Roman Gushchin <guro>
Cc: Tejun Heo <tj>
Signed-off-by: Linus Torvalds <torvalds>
***
This issue has been addressed in the following products: Red Hat Enterprise Linux 9.0 Extended Update Support Via RHSA-2024:1250 https://access.redhat.com/errata/RHSA-2024:1250 This issue has been addressed in the following products: Red Hat Enterprise Linux 9.2 Extended Update Support Via RHSA-2024:1303 https://access.redhat.com/errata/RHSA-2024:1303 This issue has been addressed in the following products: Red Hat Enterprise Linux 9.2 Extended Update Support Via RHSA-2024:1304 https://access.redhat.com/errata/RHSA-2024:1304 This issue has been addressed in the following products: Red Hat Enterprise Linux 9.0 Extended Update Support Via RHSA-2024:1306 https://access.redhat.com/errata/RHSA-2024:1306 |