CVE-2024-27058 (GCVE-0-2024-27058)
Vulnerability from cvelistv5 – Published: 2024-05-01 13:00 – Updated: 2025-05-04 09:03
VLAI?
Title
tmpfs: fix race on handling dquot rbtree
Summary
In the Linux kernel, the following vulnerability has been resolved:
tmpfs: fix race on handling dquot rbtree
A syzkaller reproducer found a race while attempting to remove dquot
information from the rb tree.
Fetching the rb_tree root node must also be protected by the
dqopt->dqio_sem, otherwise, giving the right timing, shmem_release_dquot()
will trigger a warning because it couldn't find a node in the tree, when
the real reason was the root node changing before the search starts:
Thread 1 Thread 2
- shmem_release_dquot() - shmem_{acquire,release}_dquot()
- fetch ROOT - Fetch ROOT
- acquire dqio_sem
- wait dqio_sem
- do something, triger a tree rebalance
- release dqio_sem
- acquire dqio_sem
- start searching for the node, but
from the wrong location, missing
the node, and triggering a warning.
Severity ?
4.7 (Medium)
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Affected:
eafc474e202978ac735c551d5ee1eb8c02e2be54 , < c7077f43f30d817d10a9f8245e51576ac114b2f0
(git)
Affected: eafc474e202978ac735c551d5ee1eb8c02e2be54 , < 617d55b90e73c7b4aa2733ca6cc3f9b72d1124bb (git) Affected: eafc474e202978ac735c551d5ee1eb8c02e2be54 , < f82f184874d2761ebaa60dccf577921a0dbb3810 (git) Affected: eafc474e202978ac735c551d5ee1eb8c02e2be54 , < 0a69b6b3a026543bc215ccc866d0aea5579e6ce2 (git) |
||
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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