Re: [PATCH] kasan, mm: fix crash with HW_TAGS and DEBUG_PAGEALLOC
From: Andrew Morton <akpm@linux-foundation.org>
Date: 2021-03-04 00:14:54
Also in:
linux-mm, lkml
On Fri, 26 Feb 2021 02:25:37 +0100 Andrey Konovalov [off-list ref] 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. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel