Messages in this thread | | | From | Geert Uytterhoeven <> | Date | Fri, 15 Jul 2022 10:17:43 +0200 | Subject | Re: [PATCH v2 1/1] mm: kfence: apply kmemleak_ignore_phys on early allocated pool |
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Hi Yee,
On Tue, Jun 28, 2022 at 1:42 PM <yee.lee@mediatek.com> wrote: > From: Yee Lee <yee.lee@mediatek.com> > > This patch solves two issues. > > (1) The pool allocated by memblock needs to unregister from > kmemleak scanning. Apply kmemleak_ignore_phys to replace the > original kmemleak_free as its address now is stored in the phys tree. > > (2) The pool late allocated by page-alloc doesn't need to unregister. > Move out the freeing operation from its call path. > > Suggested-by: Catalin Marinas <catalin.marinas@arm.com> > Suggested-by: Marco Elver <elver@google.com> > Signed-off-by: Yee Lee <yee.lee@mediatek.com>
Thank you, this fixes the storm of
BUG: KFENCE: invalid read in scan_block+0x78/0x130 BUG: KFENCE: use-after-free read in scan_block+0x78/0x130 BUG: KFENCE: out-of-bounds read in scan_block+0x78/0x130
messages I was seeing on arm64.
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Gr{oetje,eeting}s,
Geert
-- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds
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