CVE-2024-27058 (GCVE-0-2024-27058)
Vulnerability from cvelistv5
Published
2024-05-01 13:00
Modified
2026-05-11 20:09
Severity ?
4.7 (Medium) - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: eafc474e202978ac735c551d5ee1eb8c02e2be54
Version: eafc474e202978ac735c551d5ee1eb8c02e2be54
Version: eafc474e202978ac735c551d5ee1eb8c02e2be54
Version: eafc474e202978ac735c551d5ee1eb8c02e2be54
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