X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/a39ff7e25e19b3a8c3020042a3872ca9ec9659f1..e8c3f78193f1895ea514044358b93b1add9322f3:/san/kasan-x86_64.c

diff --git a/san/kasan-x86_64.c b/san/kasan-x86_64.c
index e2cb6d3bd..4b685e67f 100644
--- a/san/kasan-x86_64.c
+++ b/san/kasan-x86_64.c
@@ -194,9 +194,12 @@ kasan_map_shadow_superpage_zero(vm_offset_t address, vm_size_t size)
 void
 kasan_map_shadow(vm_offset_t address, vm_size_t size, bool is_zero)
 {
+	size = (size + 0x7UL) & ~0x7UL;
 	vm_offset_t shadow_base = vm_map_trunc_page(SHADOW_FOR_ADDRESS(address), PAGE_MASK);
 	vm_offset_t shadow_top = vm_map_round_page(SHADOW_FOR_ADDRESS(address + size), PAGE_MASK);
 
+	assert((size & 0x7) == 0);
+
 	for (; shadow_base < shadow_top; shadow_base += I386_PGBYTES) {
 
 		split_addr_t addr = split_address(shadow_base);