Commit aae2f753 authored by Alexander Gordeev's avatar Alexander Gordeev Committed by Heiko Carstens
Browse files

s390/kasan: sort out physical vs virtual memory confusion 



The kasan early boot memory allocators operate on pgalloc_pos
and segment_pos physical address pointers, but fail to convert
it to the corresponding virtual pointers.

Currently it is not a problem, since virtual and physical
addresses on s390 are the same. Nevertheless, should they
ever differ, this would cause an invalid pointer access.

Reviewed-by: default avatarHeiko Carstens <hca@linux.ibm.com>
Signed-off-by: default avatarAlexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: default avatarHeiko Carstens <hca@linux.ibm.com>
parent 639886b7

arch/s390/mm/kasan_init.c

+2 −2
Original line number Diff line number Diff line
@@ -39,7 +39,7 @@ static void * __init kasan_early_alloc_segment(void) 
	if (segment_pos < segment_low)

		kasan_early_panic("out of memory during initialisation\n");



	return (void *)segment_pos;

	return __va(segment_pos);

}



static void * __init kasan_early_alloc_pages(unsigned int order)
@@ -49,7 +49,7 @@ static void * __init kasan_early_alloc_pages(unsigned int order) 
	if (pgalloc_pos < pgalloc_low)

		kasan_early_panic("out of memory during initialisation\n");



	return (void *)pgalloc_pos;

	return __va(pgalloc_pos);

}



static void * __init kasan_early_crst_alloc(unsigned long val)