[Xen-devel] [PATCH 1/1] kexec: ensure kexec_status() return bit value of 0 or 1

[Eric DeVolder <eric.devolder@xxxxxxxxxx>]

When checking kexec_flags bit corresponding to the
requested image, ensure that 0 or 1 is returned.

Signed-off-by: Eric DeVolder <eric.devolder@xxxxxxxxxx>
---
 xen/common/kexec.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/xen/common/kexec.c b/xen/common/kexec.c
index aa808cb..3da27bf 100644
--- a/xen/common/kexec.c
+++ b/xen/common/kexec.c
@@ -1182,7 +1182,8 @@ static int kexec_status(XEN_GUEST_HANDLE_PARAM(void) uarg)
     if ( kexec_load_get_bits(status.type, &base, &bit) )
         return -EINVAL;
 
-    return test_bit(bit, &kexec_flags);
+    /* Ensure return bit value of 0 or 1 */
+    return !!test_bit(bit, &kexec_flags);
 }
 
 static int do_kexec_op_internal(unsigned long op,
-- 
2.7.4


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