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kasan:support kasan_mem_to_shadow can check any size 

Signed-off-by: anjiahao <anjiahao@xiaomi.com>
This commit is contained in:
anjiahao 2024-01-12 12:25:55 +08:00 committed by Xiang Xiao
parent 5952bc7392
commit 780abec239
1 changed files with 37 additions and 8 deletions
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45
mm/kasan/kasan.c
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@ -104,16 +104,10 @@ extern const unsigned char g_globals_region[];
* Private Functions
****************************************************************************/
static FAR uintptr_t *kasan_mem_to_shadow(FAR const void *ptr, size_t size,
unsigned int *bit)
static inline FAR uintptr_t *kasan_find_mem(uintptr_t addr, size_t size,
unsigned int *bit)
{
FAR struct kasan_region_s *region;
uintptr_t addr = (uintptr_t)ptr;
if (g_region_init != KASAN_INIT_VALUE)
{
return NULL;
}
for (region = g_region; region != NULL; region = region->next)
{
@ -146,6 +140,41 @@ static FAR uintptr_t *kasan_mem_to_shadow(FAR const void *ptr, size_t size,
return NULL;
}
static FAR uintptr_t *kasan_mem_to_shadow(FAR const void *ptr, size_t size,
unsigned int *bit)
{
uintptr_t addr = (uintptr_t)ptr;
FAR uintptr_t *ret;
size_t mul;
size_t mod;
size_t i;
if (g_region_init != KASAN_INIT_VALUE)
{
return NULL;
}
if (size > KASAN_SHADOW_SCALE)
{
mul = size / KASAN_SHADOW_SCALE;
for (i = 0; i < mul; i++)
{
ret = kasan_find_mem(addr + i * KASAN_SHADOW_SCALE,
KASAN_SHADOW_SCALE, bit);
if (ret)
{
return ret;
}
}
mod = size % KASAN_SHADOW_SCALE;
addr += mul * KASAN_SHADOW_SCALE;
size = mod;
}
return kasan_find_mem(addr, size, bit);
}
static void kasan_show_memory(FAR const uint8_t *addr, size_t size,
size_t dumpsize)
{