[Xen-changelog] [xen master] xen/arm: efi: Avoid out-of-bounds write in meminfo_add_bank

[patchbot@xxxxxxx]

commit a68ffd36e9eae8db318c5752f5319d2901ef74b3
Author:     Julien Grall <julien.grall@xxxxxxx>
AuthorDate: Thu May 4 20:36:41 2017 +0100
Commit:     Stefano Stabellini <sstabellini@xxxxxxxxxx>
CommitDate: Thu May 4 15:00:18 2017 -0700

    xen/arm: efi: Avoid out-of-bounds write in meminfo_add_bank
    
    Commit 2c77db77 "xen/arm: efi: Avoid duplicating the addition of a new
    bank", introduced a new function meminfo_add_bank that add a new bank.
    This new code fails to check correctly the size of the array which may
    result to an out-of-bounds write.
    
    Coverity-ID: 1433183
    Signed-off-by: Julien Grall <julien.grall@xxxxxxx>
    Reviewed-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
---
 xen/arch/arm/efi/efi-boot.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/arch/arm/efi/efi-boot.h b/xen/arch/arm/efi/efi-boot.h
index e1e447a..2986c83 100644
--- a/xen/arch/arm/efi/efi-boot.h
+++ b/xen/arch/arm/efi/efi-boot.h
@@ -128,7 +128,7 @@ static bool __init meminfo_add_bank(struct meminfo *mem,
 {
     struct membank *bank;
 
-    if ( mem->nr_banks > NR_MEM_BANKS )
+    if ( mem->nr_banks >= NR_MEM_BANKS )
         return false;
 
     bank = &mem->bank[mem->nr_banks];
--
generated by git-patchbot for /home/xen/git/xen.git#master

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