Messages in this thread | | | Date | Wed, 3 Mar 2021 15:23:55 -0800 | From | Andrew Morton <> | Subject | Re: [PATCH] kasan, mm: fix crash with HW_TAGS and DEBUG_PAGEALLOC |
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On Fri, 26 Feb 2021 02:25:37 +0100 Andrey Konovalov <andreyknvl@google.com> wrote:
> Currently, kasan_free_nondeferred_pages()->kasan_free_pages() is called > after debug_pagealloc_unmap_pages(). This causes a crash when > debug_pagealloc is enabled, as HW_TAGS KASAN can't set tags on an > unmapped page. > > This patch puts kasan_free_nondeferred_pages() before > debug_pagealloc_unmap_pages(). > > Besides fixing the crash, this also makes the annotation order consistent > with debug_pagealloc_map_pages() preceding kasan_alloc_pages(). >
This bug exists in 5.12, does it not?
If so, is cc:stable appropriate and if so, do we have a suitable Fixes: commit?
Thanks.
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