CVE-2024-27022
Vulnerability from cvelistv5
Published
2024-05-01 05:35
Modified
2024-12-19 08:52
Severity ?
Summary
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/04b0c41912349aff11a1bbaef6a722bd7fbb90ac
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0c42f7e039aba3de6d7dbf92da708e2b2ecba557Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/35e351780fa9d8240dd6f7e4f245f9ea37e96c19Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/abdb88dd272bbeb93efe01d8e0b7b17e24af3a34Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cec11fa2eb512ebe3a459c185f4aca1d44059bbfPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/dd782da470761077f4d1120e191f1a35787cda6e
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/04b0c41912349aff11a1bbaef6a722bd7fbb90ac
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/0c42f7e039aba3de6d7dbf92da708e2b2ecba557Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/35e351780fa9d8240dd6f7e4f245f9ea37e96c19Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/abdb88dd272bbeb93efe01d8e0b7b17e24af3a34Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/cec11fa2eb512ebe3a459c185f4aca1d44059bbfPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/dd782da470761077f4d1120e191f1a35787cda6e
Impacted products
Vendor Product Version
Linux Linux Version: 6.1
Show details on NVD website

To clipboard 

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