Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: s390/vmem: Split pages when debug pagealloc is enabled. Since commit bb1520d581a3 “s390/mm: Start kernel with DAT enabled”, the kernel crashes early during boot when debug pagealloc is enabled. Symptoms: - Memory initialization:...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: mshvvtl: Fixed the issue where vmemmapshift exceeded MAXFOLIOORDER. When registering VTL0 memory via MSHVADDVTL0MEMORY, the kernel calculates pgmap-vmemmapshift as the number of trailing zeros in the OR of startpfn and lastpfn. T...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: tee: amdtee: fixed an issue where ISERR returned NULL instead of an error pointer. The getfreepages function does not return error pointers; it returns NULL instead. Therefore, this condition needs to be corrected to avoid NUL...

Astra Linux – Vulnerabilities in Linux, Linux-5.10, Linux-5.15, Linux-6.1

In the Linux kernel, the following vulnerability has been resolved: perf/core: Abrupt exit if the requested AUX area is out of bounds. When using perf-record with a large AUX area, for example 4GB, the following error occurs: bash perf record -C 0 -m ,4G -e armspe0// -- sleep 1 Failed to mmap wit...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: mm/memory-failure: fixed a deadlock that occurred when hugetlboptimizevmemmap was enabled. When I performed hard offline tests with hugetlb pages, a deadlock occurred as follows:...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: codetag: debug: marking codetags for poisoned pages as empty When PGhwpoison pages are freed, they are treated differently in freepagesprepare. Instead of being released, they are isolated. The page allocation tag counters are...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: mm/shmem, swap: fixed the soft lockup issue with mTHP swapin. The following soft lockup can be easily reproduced on my test machine using the following command: echo always...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: In the mm/pagealloc function, the clearpage-private operation is performed in freepagesprepare. Several subsystems slub, shmem, ttm, etc. use page-private, but they do not clear it before freeing pages. When these pages are later...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: EROFs: Avoid linking hooked chains to prevent loops in deduplicated compressed images. After subjecting EROFS to heavy stress using several images that included a handcrafted image with repeated patterns for over 46 days, I...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: mm: thp: Deny THP for files on anonymous inodes The filethpenabled function incorrectly allows THP for files on anonymous inodes e.g., guestmemfd and secretmem. These files are created using allocfilepseudo, which does not cal...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: cifs: Fixed data corruption during writeback operations. The cifswriteback mechanism does not properly handle the situation where cifsextendwriteback reaches a point where an additional folio needs to be processed. This could...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: drm/i915: Fixed the potential overflow of the shmem scatterlist length When a scatterlists table of a GEM shmem object with a size of 4 GB or more is populated with pages allocated from the folio format, the .length attribute of...

Astra Linux – Vulnerabilities in Linux, Linux-5.10, Linux-5.15, Linux-6.1

In the Linux kernel, the following vulnerabilities have been resolved: Nilfs2: Fixed a hang issue in nilfslookupdirtydatabuffers. Syzbot reported a hang issue in migratepagesbatch, called by mbind, and nilfslookupdirtydatabuffers, called in the log writer of nilfs2. While migratepagesbatch locks ...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: mm/hugememory: Do not clobber swpentryt during THP split. The following issue was observed when running stress mmap since the commit b653db77350c: “mm: Clear page-private when splitting or migrating a page.” Watchdog: BUG: Soft...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: mm/hugetlb: restored global reservations to the subpool The commit a833a693a490 “mm: hugetlb: fixed incorrect fallback for the subpool” fixed an underflow error caused by incorrectly attributing globally requested pages to the...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: nfsd: Do not replace a page in the rqpages array if it is a continuation of the last page. The splice read function calls nfsdspliceactor to place the pages containing file data into the svcrqst-rqpages array. However, it is...

Astra Linux – Vulnerability in Linux, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: x86/mm/identmap: Use GB pages only when a full GB page should be mapped. When identpudinit uses only GB pages to create identity maps, large ranges of addresses that are not actually requested can be included in the resulting...

Astra Linux – Vulnerability found in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: mm/swapfile: condresched was added to getswappages. A softlockup still occurs in getswappages under memory pressure. With 64 CPU cores, 64GB of memory, and 28 zram devices, the size of each zram device is 50MB, and they all have...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: mm/hugememory: The issue of using NULL for folio handling in movepageshugepmd has been fixed. movepageshugepmd handles UFFDIOMOVE operations for both normal THPs and huge zero pages. For the huge zero page, srcfolio is explicitly...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: iommufd: Fixed the issue where pages were unpinned when an access was present. syzkaller discovered that the calculation of batchlastindex should use ‘startindex’, because when this function is called, the batch is either empt...