CVE-2024-57839

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> Revert "readahead: properly shorten readahead when falling back to do_page_cache_ra()"<br /> <br /> This reverts commit 7c877586da3178974a8a94577b6045a48377ff25.<br /> <br /> Anders and Philippe have reported that recent kernels occasionally hang<br /> when used with NFS in readahead code. The problem has been bisected to<br /> 7c877586da3 ("readahead: properly shorten readahead when falling back to<br /> do_page_cache_ra()"). The cause of the problem is that ra-&gt;size can be<br /> shrunk by read_pages() call and subsequently we end up calling<br /> do_page_cache_ra() with negative (read huge positive) number of pages. <br /> Let&amp;#39;s revert 7c877586da3 for now until we can find a proper way how the<br /> logic in read_pages() and page_cache_ra_order() can coexist. This can<br /> lead to reduced readahead throughput due to readahead window confusion but<br /> that&amp;#39;s better than outright hangs.