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| author | Yinghai Lu <yhlu.kernel@gmail.com> | 2008-06-24 14:58:38 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-07-08 13:10:36 +0200 |
| commit | 232b957ae93973a5f8619ef61b916744b747478c (patch) | |
| tree | 09b6b659f56eea330c5b1be23dad344b5e5ab950 /arch/x86/kernel/e820.c | |
| parent | d86623a0d55a14e7295e8ca1bd258e0c7f8dcb31 (diff) | |
x86: change size if e820_update/remove_range
in case someone using crazy parameter while calling them.
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/e820.c')
| -rw-r--r-- | arch/x86/kernel/e820.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c index 15b4393ff9b..1b76b25b4d9 100644 --- a/arch/x86/kernel/e820.c +++ b/arch/x86/kernel/e820.c @@ -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; |