Re: [PATCH] mm: hugetlb: fix dissolve_free_huge_page use of tail/head page
From: Oscar Salvador <osalvador@suse.de>
Date: 2021-05-28 07:30:38
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On Thu, May 27, 2021 at 04:12:25PM -0700, Mike Kravetz wrote:
The routine dissolve_free_huge_page can be passed the tail page of a hugetlb page. The tail page is incorrectly passed on to the routines alloc_huge_page_vmemmap and add_hugetlb_page which expect a hugetlb head page. Operating on a tail page instead of head page could result in addressing exceptions or vmemmap corruption. Signed-off-by: Mike Kravetz <redacted>
I guess Andrew will squash the changes, but fwiw: Reviewed-by: Oscar Salvador <osalvador@suse.de> -- Oscar Salvador SUSE L3