[Xen-changelog] [xen stable-4.8] fix out of bound access to mode_strings

[patchbot@xxxxxxx]

commit b2e678e81dd9635eb33279e2817168d13b78c1fa
Author:     Stefano Stabellini <sstabellini@xxxxxxxxxx>
AuthorDate: Thu Dec 8 17:17:04 2016 -0800
Commit:     Stefano Stabellini <sstabellini@xxxxxxxxxx>
CommitDate: Thu Mar 16 13:47:03 2017 -0700

    fix out of bound access to mode_strings
    
    mode == ARRAY_SIZE(mode_strings) causes an out of bound access to
    the mode_strings array.
    
    Coverity-ID: 1381859
    
    Signed-off-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
    Reviewed-by: Julien Grall <julien.grall@xxxxxxx>
---
 xen/arch/arm/traps.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/arch/arm/traps.c b/xen/arch/arm/traps.c
index 7ab96d4..90aba2a 100644
--- a/xen/arch/arm/traps.c
+++ b/xen/arch/arm/traps.c
@@ -656,7 +656,7 @@ static const char *mode_string(uint32_t cpsr)
     };
     mode = cpsr & PSR_MODE_MASK;
 
-    if ( mode > ARRAY_SIZE(mode_strings) )
+    if ( mode >= ARRAY_SIZE(mode_strings) )
         return "Unknown";
     return mode_strings[mode] ? : "Unknown";
 }
--
generated by git-patchbot for /home/xen/git/xen.git#stable-4.8

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