Linux Kernel Memory Management: Fix pte tag handling in fork()

From this webpage screenshot, the following key information about the vulnerability can be obtained: Vulnerability Description: - This submission fixes the pte marking issue that occurs when operations do not trigger the event. - Patch 1 resolves the syzkiller issue reported by Pengfei. - Patch 2 further strengthens pte marking, especially in cases of recent incorrect swapin marking usage. Specific Issues: - During , is not guaranteed to have the marking, even if has it and pte marking has already been installed. - The warnings and comments are incorrect; the proper approach is to inherit pte marking when needed, or keep empty. Fixes Implemented: - Code in was modified to remove unnecessary warnings and comments, and pte marking is set under appropriate conditions. Related Links: - Bugzilla Report: https://bugzilla.kernel.org/show_bug.cgi?id=216808 - Reproducer: https://github.com/xupengfei/syzkaller_logs/blob/main/221208_115556_copy_page_range/repro.c Commit Information: - Author: Peter Xu - Committer: Andrew Morton - Commit Date: 2023-01-18 17:02:19 -0800 - Commit Hash: 49d6d7fb631345b0f2957a7c4be24ad63903150f This information indicates that this is a fix for the memory management module in a stable version of the Linux kernel, addressing proper handling of operations and pte marking.

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Linux Kernel Memory Management: Fix pte tag handling in fork()