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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: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
This commit is contained in:
Alexander Gordeev 2022-12-13 11:31:39 +01:00 committed by Heiko Carstens
parent 639886b71d
commit aae2f753d2
1 changed files with 2 additions and 2 deletions
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4
arch/s390/mm/kasan_init.c
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@ -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)