kernel: mm/filemap: skip to create PMD-sized page cache if needed

A vulnerability was found in the Linux kernel related to how large page caching is handled, particularly for AMD64 architectures. The issue stems from the xarray data structure's inability to support PMD-sized page caches when the base page size is larger than MAXPAGECACHEORDER. The particular...

Moderate: Red Hat Security Advisory: kernel-rt security update

An update for kernel-rt is now available for Red Hat Enterprise Linux 9.2 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available fo...

CVE-2024-45024

In the Linux kernel, the following vulnerability has been resolved: mm/hugetlb: fix hugetlb vs. core-mm PT locking We recently made GUP's common page table walking code to also walk hugetlb VMAs without most hugetlb special-casing, preparing for the future of having less hugetlb-specific page tab...

CVE-2024-44965

In the Linux kernel, the following vulnerability has been resolved: x86/mm: Fix pticlonepgtable alignment assumption Guenter reported dodgy crashes on an i386-nosmp build using GCC-11 that had the form of endless traps until entry stack exhaust and then DF from the stack guard. It turned out that...

CVE-2024-44965

In the Linux kernel, the following vulnerability has been resolved: x86/mm: Fix pticlonepgtable alignment assumption Guenter reported dodgy crashes on an i386-nosmp build using GCC-11 that had the form of endless traps until entry stack exhaust and then DF from the stack guard. It turned out that...

CVE-2024-44965

In the Linux kernel, the following vulnerability has been resolved: x86/mm: Fix pticlonepgtable alignment assumption Guenter reported dodgy crashes on an i386-nosmp build using GCC-11 that had the form of endless traps until entry stack exhaust and then DF from the stack guard. It turned out that...

CVE-2024-44965

In the Linux kernel, the following vulnerability has been resolved: x86/mm: Fix pticlonepgtable alignment assumption Guenter reported dodgy crashes on an i386-nosmp build using GCC-11 that had the form of endless traps until entry stack exhaust and then DF from the stack guard. It turned out that...

CVE-2024-44965 x86/mm: Fix pti_clone_pgtable() alignment assumption

In the Linux kernel, the following vulnerability has been resolved: x86/mm: Fix pticlonepgtable alignment assumption Guenter reported dodgy crashes on an i386-nosmp build using GCC-11 that had the form of endless traps until entry stack exhaust and then DF from the stack guard. It turned out that...

CVE-2024-44965 x86/mm: Fix pti_clone_pgtable() alignment assumption

In the Linux kernel, the following vulnerability has been resolved: x86/mm: Fix pticlonepgtable alignment assumption Guenter reported dodgy crashes on an i386-nosmp build using GCC-11 that had the form of endless traps until entry stack exhaust and then DF from the stack guard. It turned out that...

PT-2024-32200

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 6.5 Description The vulnerability is related to the userfaultfd feature in the Linux kernel, specifically with the pmd trans huge code in mfill atomic. The issue arises from a racy check that can lead to a BUG ON...

SUSE CVE-2022-48897

In the Linux kernel, the following vulnerability has been resolved: arm64/mm: fix incorrect filemapcount for invalid pmd The page table check trigger BUGON unexpectedly when split hugepage: ------------ cut here ------------ kernel BUG at mm/pagetablecheck.c:119! Internal error: Oops - BUG:...

CVE-2022-48897

In the Linux kernel, the following vulnerability has been resolved: arm64/mm: fix incorrect filemapcount for invalid pmd The page table check trigger BUGON unexpectedly when split hugepage: ------------ cut here ------------ kernel BUG at mm/pagetablecheck.c:119! Internal error: Oops - BUG:...

CVE-2022-48897

In the Linux kernel, the following vulnerability has been resolved: arm64/mm: fix incorrect filemapcount for invalid pmd The page table check trigger BUGON unexpectedly when split hugepage: ------------ cut here ------------ kernel BUG at mm/pagetablecheck.c:119! Internal error: Oops - BUG:...

DEBIAN-CVE-2022-48897

In the Linux kernel, the following vulnerability has been resolved: arm64/mm: fix incorrect filemapcount for invalid pmd The page table check trigger BUGON unexpectedly when split hugepage: ------------ cut here ------------ kernel BUG at mm/pagetablecheck.c:119! Internal error: Oops - BUG:...

UBUNTU-CVE-2022-48897

In the Linux kernel, the following vulnerability has been resolved: arm64/mm: fix incorrect filemapcount for invalid pmd The page table check trigger BUGON unexpectedly when split hugepage: ------------ cut here ------------ kernel BUG at mm/pagetablecheck.c:119! Internal error: Oops - BUG:...

CVE-2022-48897

In the Linux kernel, the following vulnerability has been resolved: arm64/mm: fix incorrect filemapcount for invalid pmd The page table check trigger BUGON unexpectedly when split hugepage: ------------ cut here ------------ kernel BUG at mm/pagetablecheck.c:119! Internal error: Oops - BUG:...

CVE-2022-48897

CVE-2022-48897 affects the Linux kernel arm64 memory management, specifically a bug where pmd_leaf could be considered valid even when the PMD is invalid due to pmd_present_invalid. This caused file_map_count to be decremented and then incremented in multiple code paths, ultimately triggering a B...

CVE-2022-48897 arm64/mm: fix incorrect file_map_count for invalid pmd

In the Linux kernel, the following vulnerability has been resolved: arm64/mm: fix incorrect filemapcount for invalid pmd The page table check trigger BUGON unexpectedly when split hugepage: ------------ cut here ------------ kernel BUG at mm/pagetablecheck.c:119! Internal error: Oops - BUG:...

CVE-2024-42317

In the Linux kernel, the following vulnerability has been resolved: mm/hugememory: avoid PMD-size page cache if needed xarray can't support arbitrary page cache size. the largest and supported page cache size is defined as MAXPAGECACHEORDER by commit 099d90642a71 "mm/filemap: make MAXPAGECACHEORD...

CVE-2024-42317

The CVE-2024-42317 issue affects the Linux kernel mm/huge_memory path on ARM64 with 64KB base pages. It stems from xarray not supporting arbitrary page cache sizes beyond MAX_PAGECACHE_ORDER, which can allow a 512 MB page cache in the collapsing path and triggers a warning when splitting an xarra...