Messages in this thread | | | Date | Tue, 4 Aug 2020 14:19:41 +0100 | From | Catalin Marinas <> | Subject | Re: [PATCH v2 3/5] kasan, arm64: don't instrument functions that enable kasan |
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On Tue, Aug 04, 2020 at 02:41:26PM +0200, Andrey Konovalov wrote: > This patch prepares Software Tag-Based KASAN for stack tagging support. > > With stack tagging enabled, KASAN tags stack variable in each function > in its prologue. In start_kernel() stack variables get tagged before KASAN > is enabled via setup_arch()->kasan_init(). As the result the tags for > start_kernel()'s stack variables end up in the temporary shadow memory. > Later when KASAN gets enabled, switched to normal shadow, and starts > checking tags, this leads to false-positive reports, as proper tags are > missing in normal shadow. > > Disable KASAN instrumentation for start_kernel(). Also disable it for > arm64's setup_arch() as a precaution (it doesn't have any stack variables > right now). > > Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
I thought I acked this already. Either way:
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
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