In the Linux kernel, the following vulnerability has been resolved:
fork: defer linking file vma until vma is fully initialized
Thorvald reported a WARNING [1]. And the root cause is below race:
CPU 1 CPU 2
fork hugetlbfs_fallocate
dup_mmap hugetlbfs_punch_hole
i_mmap_lock_write(mapping);
vma_interval_tree_insert_after -- Child vma is visible through i_mmap tree.
i_mmap_unlock_write(mapping);
hugetlb_dup_vma_private -- Clear vma_lock outside i_mmap_rwsem!
i_mmap_lock_write(mapping);
hugetlb_vmdelete_list
vma_interval_tree_foreach
hugetlb_vma_trylock_write -- Vma_lock is cleared.
tmp->vm_ops->open -- Alloc new vma_lock outside i_mmap_rwsem!
hugetlb_vma_unlock_write -- Vma_lock is assigned!!!
i_mmap_unlock_write(mapping);
hugetlb_dup_vma_private() and hugetlb_vm_op_open() are called outside
i_mmap_rwsem lock while vma lock can be used in the same time. Fix this
by deferring linking file vma until vma is fully initialized. Those vmas
should be initialized first before they can be used.
Metrics
Affected Vendors & Products
References
History
Fri, 22 Nov 2024 16:00:00 +0000
Type | Values Removed | Values Added |
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Weaknesses | CWE-362 |
Tue, 24 Sep 2024 11:15:00 +0000
Type | Values Removed | Values Added |
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First Time appeared |
Redhat
Redhat enterprise Linux |
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CPEs | cpe:/a:redhat:enterprise_linux:9 cpe:/o:redhat:enterprise_linux:9 |
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Vendors & Products |
Redhat
Redhat enterprise Linux |
Thu, 12 Sep 2024 08:30:00 +0000
Type | Values Removed | Values Added |
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Metrics |
ssvc
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Wed, 11 Sep 2024 13:30:00 +0000
Type | Values Removed | Values Added |
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Metrics |
ssvc
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MITRE
Status: PUBLISHED
Assigner: Linux
Published: 2024-05-01T05:35:39.627Z
Updated: 2024-11-05T09:20:08.139Z
Reserved: 2024-02-19T14:20:24.210Z
Link: CVE-2024-27022
Vulnrichment
Updated: 2024-08-02T00:21:05.791Z
NVD
Status : Modified
Published: 2024-05-01T06:15:21.110
Modified: 2024-11-21T09:03:41.010
Link: CVE-2024-27022
Redhat