CVE-2024-27058
EPSS
0.04 % (16th)
Advisories
5
NVD Status
Awaiting Analysis
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.
- CVE Status
- PUBLISHED
- NVD Status
- Awaiting Analysis
- CNA
- kernel.org
- Published Date
-
2024-05-01 13:15:50
(4 months ago) - Updated Date
-
2024-05-01 19:50:25
(4 months ago)
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