[Xen-changelog] [xen master] xen/arm: add lower-bound check in mfn_valid

[patchbot@xxxxxxx]

commit ceb93c72d2046bffecd57fcbebd04aa0801414a2
Author:     Jaeyong Yoo <jaeyong.yoo@xxxxxxxxxxx>
AuthorDate: Fri Aug 23 18:08:41 2013 +0900
Commit:     Ian Campbell <ian.campbell@xxxxxxxxxx>
CommitDate: Tue Aug 27 14:27:26 2013 +0100

    xen/arm: add lower-bound check in mfn_valid
    
    mfn_valid only checks the upper-bound of mfn (max_page).
    Add the lower-bound check of mfn (frametable_base_mfn).
    
    Signed-off-by: Jaeyong Yoo <jaeyong.yoo@xxxxxxxxxxx>
    Acked-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
    Acked-by: Julien Grall <julien.grall@xxxxxxxxxx>
---
 xen/include/asm-arm/mm.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/xen/include/asm-arm/mm.h b/xen/include/asm-arm/mm.h
index 27284d0..97c2ee0 100644
--- a/xen/include/asm-arm/mm.h
+++ b/xen/include/asm-arm/mm.h
@@ -190,7 +190,7 @@ static inline void __iomem *ioremap_wc(paddr_t start, 
size_t len)
 
 #define mfn_valid(mfn)        ({                                              \
     unsigned long __m_f_n = (mfn);                                            \
-    likely(__m_f_n < max_page);                                               \
+    likely(__m_f_n >= frametable_base_mfn && __m_f_n < max_page);             \
 })
 
 #define max_pdx                 max_page
--
generated by git-patchbot for /home/xen/git/xen.git#master

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