https://vulnerability.circl.lu Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Thu, 01 Oct 2026 14:03:00 +0000 https://vulnerability.circl.lu/vuln/cve-2021-47365 <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>afs: Fix page leak</p> <p>There&#39;s a loop in afs_extend_writeback() that adds extra pages to a write we want to make to improve the efficiency of the writeback by making it larger. This loop stops, however, if we hit a page we can&#39;t write back from immediately, but it doesn&#39;t get rid of the page ref we speculatively acquired.</p> <p>This was caused by the removal of the cleanup loop when the code switched from using find_get_pages_contig() to xarray scanning as the latter only gets a single page at a time, not a batch.</p> <p>Fix this by putting the page on a ref on an early break from the loop. Unfortunately, we can&#39;t just add that page to the pagevec we&#39;re employing as we&#39;ll go through that and add those pages to the RPC call.</p> <p>This was found by the generic/074 test. It leaks ~4GiB of RAM each time it is run - which can be observed with &#34;top&#34;.</p> <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>afs: Fix page leak</p> <p>There&#39;s a loop in afs_extend_writeback() that adds extra pages to a write we want to make to improve the efficiency of the writeback by making it larger. This loop stops, however, if we hit a page we can&#39;t write back from immediately, but it doesn&#39;t get rid of the page ref we speculatively acquired.</p> <p>This was caused by the removal of the cleanup loop when the code switched from using find_get_pages_contig() to xarray scanning as the latter only gets a single page at a time, not a batch.</p> <p>Fix this by putting the page on a ref on an early break from the loop. Unfortunately, we can&#39;t just add that page to the pagevec we&#39;re employing as we&#39;ll go through that and add those pages to the RPC call.</p> <p>This was found by the generic/074 test. It leaks ~4GiB of RAM each time it is run - which can be observed with &#34;top&#34;.</p> https://vulnerability.circl.lu/vuln/cve-2021-47365