cve/2024/CVE-2024-27058.md

### [CVE-2024-27058](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-27058)
![](https://img.shields.io/static/v1?label=Product&message=Linux&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=&color=brightgreen)
![](https://img.shields.io/static/v1?label=Version&message=6.6%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Version&message=eafc474e202978ac735c551d5ee1eb8c02e2be54%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=blue)

### Description

In the Linux kernel, the following vulnerability has been resolved:tmpfs: fix race on handling dquot rbtreeA syzkaller reproducer found a race while attempting to remove dquotinformation from the rb tree.Fetching the rb_tree root node must also be protected by thedqopt->dqio_sem, otherwise, giving the right timing, shmem_release_dquot()will trigger a warning because it couldn't find a node in the tree, whenthe 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.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/fkie-cad/nvd-json-data-feeds