Messages in this thread | | | From | Lecopzer Chen <> | Subject | Re: [PATCH v4 5/5] arm64: Kconfig: select KASAN_VMALLOC if KANSAN_GENERIC is enabled | Date | Tue, 30 Mar 2021 16:14:17 +0800 |
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> On Wed, Mar 24, 2021 at 12:05:22PM +0800, Lecopzer Chen wrote: > > Before this patch, someone who wants to use VMAP_STACK when > > KASAN_GENERIC enabled must explicitly select KASAN_VMALLOC. > > > > From Will's suggestion [1]: > > > I would _really_ like to move to VMAP stack unconditionally, and > > > that would effectively force KASAN_VMALLOC to be set if KASAN is in use > > > > Because VMAP_STACK now depends on either HW_TAGS or KASAN_VMALLOC if > > KASAN enabled, in order to make VMAP_STACK selected unconditionally, > > we bind KANSAN_GENERIC and KASAN_VMALLOC together. > > > > Note that SW_TAGS supports neither VMAP_STACK nor KASAN_VMALLOC now, > > so this is the first step to make VMAP_STACK selected unconditionally. > > Do you know if anybody is working on this? It's really unfortunate that > we can't move exclusively to VMAP_STACK just because of SW_TAGS KASAN. > > That said, what is there to do? As things stand, won't kernel stack > addresses end up using KASAN_TAG_KERNEL?
Hi Andrey,
Do you or any KASAN developers have already had any plan for this?
thanks, Lecopzer
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