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| author | Jan Beulich <jbeulich@suse.com> | 2013-08-20 15:01:10 +0200 |
|---|---|---|
| committer | Jan Beulich <jbeulich@suse.com> | 2013-08-20 15:01:10 +0200 |
| commit | d1e92ff4f98181eca51e39e9370b18c47f0607b6 (patch) | |
| tree | 0fde2d34f52602fbff4f39ac38281358d6d02090 | |
| parent | c2c3d78cb84f1b47757cb3f5c1495ba662fae3a3 (diff) | |
| download | xen-d1e92ff4f98181eca51e39e9370b18c47f0607b6.tar.gz xen-d1e92ff4f98181eca51e39e9370b18c47f0607b6.tar.bz2 xen-d1e92ff4f98181eca51e39e9370b18c47f0607b6.zip | |
x86/MTRR: fix range check in mtrr_add_page()
Extracted from Yinghai Lu's Linux commit d5c78673 ("x86: Fix /proc/mtrr
with base/size more than 44bits").
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Keir Fraser <keir@xen.org>
master commit: f67af6d5803b6a015e30cb490a94f9547cb0437c
master date: 2013-08-14 11:20:26 +0200
| -rw-r--r-- | xen/arch/x86/cpu/mtrr/main.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/xen/arch/x86/cpu/mtrr/main.c b/xen/arch/x86/cpu/mtrr/main.c index a201d72b6d..f7fc0a6e4b 100644 --- a/xen/arch/x86/cpu/mtrr/main.c +++ b/xen/arch/x86/cpu/mtrr/main.c @@ -340,7 +340,7 @@ int mtrr_add_page(unsigned long base, unsigned long size, return -EINVAL; } - if (base & size_or_mask || size & size_or_mask) { + if ((base | (base + size - 1)) >> (paddr_bits - PAGE_SHIFT)) { printk(KERN_WARNING "mtrr: base or size exceeds the MTRR width\n"); return -EINVAL; } |