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-rw-r--r--arch/x86/kernel/e820.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
index 3f7777b..91abf5b 100644
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -143,7 +143,7 @@ void __init e820_print_map(char *who)
*
*/
int __init sanitize_e820_map(struct e820entry *biosmap, int max_nr_map,
- char *pnr_map)
+ int *pnr_map)
{
struct change_member {
struct e820entry *pbios; /* pointer to original bios entry */
@@ -204,6 +204,7 @@ static struct e820entry new_bios[E820_X_MAX] __initdata;
return -1;
old_nr = *pnr_map;
+ BUG_ON(old_nr > max_nr_map);
/* bail out if we find any unreasonable addresses in bios map */
for (i = 0; i < old_nr; i++)
@@ -401,7 +402,7 @@ u64 __init update_memory_range(u64 start, u64 size, unsigned old_type,
void __init update_e820(void)
{
- u8 nr_map;
+ int nr_map;
nr_map = e820.nr_map;
if (sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &nr_map))
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