x86: fix 64k corruption-check
Impact: fix boot crash
Need to exit early if the addr is far above 64k.
The crash got exposed by:
78a8b35: x86: make e820_update_range() handle small range update
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: <stable@kernel.org>
LKML-Reference: <49BC2279.2030101@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/kernel/check.c b/arch/x86/kernel/check.c
index b617b11..fc999e6 100644
--- a/arch/x86/kernel/check.c
+++ b/arch/x86/kernel/check.c
@@ -86,12 +86,12 @@
if (!(addr + 1))
break;
+ if (addr >= corruption_check_size)
+ break;
+
if ((addr + size) > corruption_check_size)
size = corruption_check_size - addr;
- if (size == 0)
- break;
-
e820_update_range(addr, size, E820_RAM, E820_RESERVED);
scan_areas[num_scan_areas].addr = addr;
scan_areas[num_scan_areas].size = size;