Commit 232b957a authored by Yinghai Lu's avatar Yinghai Lu Committed by Ingo Molnar
Browse files

x86: change size if e820_update/remove_range 



in case someone using crazy parameter while calling them.

Signed-off-by: default avatarYinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent d86623a0

arch/x86/kernel/e820.c

+6 −0
Original line number Diff line number Diff line
@@ -405,6 +405,9 @@ u64 __init e820_update_range(u64 start, u64 size, unsigned old_type, 


	BUG_ON(old_type == new_type);



	if (size > (ULLONG_MAX - start))

		size = ULLONG_MAX - start;



	for (i = 0; i < e820.nr_map; i++) {

		struct e820entry *ei = &e820.map[i];

		u64 final_start, final_end;
@@ -441,6 +444,9 @@ u64 __init e820_remove_range(u64 start, u64 size, unsigned old_type, 
	int i;

	u64 real_removed_size = 0;



	if (size > (ULLONG_MAX - start))

		size = ULLONG_MAX - start;



	for (i = 0; i < e820.nr_map; i++) {

		struct e820entry *ei = &e820.map[i];

		u64 final_start, final_end;