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H A D | Makefile | diff b6cbe3e8bdff6f21f1b58b08a55f479cdcf98282 Fri Nov 17 17:20:28 CET 2017 Vasily Gorbik <gor@linux.ibm.com> s390/kasan: avoid user access code instrumentation
Kasan instrumentation adds "store" check for variables marked as modified by inline assembly. With user pointers containing addresses from another address space this produces false positives.
static inline unsigned long clear_user_xc(void __user *to, ...) { asm volatile( ... : "+a" (to) ...
User space access functions are wrapped by manually instrumented functions in kasan common code, which should be sufficient to catch errors. So, we just disable uaccess.o instrumentation altogether.
Reviewed-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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