CVE-2024-27058: tmpfs: fix race on handling dquot rbtree
First published: Wed May 01 2024(Updated: )
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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.119-1 6.12.5-1 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- https://git.kernel.org/stable/c/0a69b6b3a026543bc215ccc866d0aea5579e6ce2
- https://git.kernel.org/stable/c/617d55b90e73c7b4aa2733ca6cc3f9b72d1124bb
- https://git.kernel.org/stable/c/c7077f43f30d817d10a9f8245e51576ac114b2f0
- https://git.kernel.org/stable/c/f82f184874d2761ebaa60dccf577921a0dbb3810
- https://launchpad.net/bugs/cve/CVE-2024-27058
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-27058
- https://nvd.nist.gov/vuln/detail/CVE-2024-27058
- https://security-tracker.debian.org/tracker/CVE-2024-27058
- https://ubuntu.com/security/CVE-2024-27058
- https://git.kernel.org/linus/0a69b6b3a026543bc215ccc866d0aea5579e6ce2
- agent/title
- agent/type
- agent/remedy
- agent/first-publish-date
- collector/launchpad-cve
- source/Launchpad
- agent/author
- collector/nvd-api
- source/NVD
- collector/usn-cve
- source/Ubuntu
- agent/event
- collector/nvd-cve
- collector/security-tracker-debian
- source/Debian
- agent/software-canonical-lookup
- collector/mitre-cve
- source/MITRE
- agent/severity
- agent/last-modified-date
- agent/description
- agent/softwarecombine
- agent/tags
- agent/references
- agent/trending
- package-manager/debian