From: Eric DeVolder <eric.devolder@oracle.com>
Date: Thu, 19 Jan 2017 17:10:53 +0000 (-0600)
Subject: kexec: ensure kexec_status() return bit value of 0 or 1
X-Git-Tag: archive/raspbian/4.11.1-1+rpi1~1^2~66^2~2943
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=f07618c290fe20bd04f8e6e648b5eb00328e2007;p=xen.git

kexec: ensure kexec_status() return bit value of 0 or 1

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

Signed-off-by: Eric DeVolder <eric.devolder@oracle.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
---

diff --git a/xen/common/kexec.c b/xen/common/kexec.c
index aa808cb2f2..940fc7ec94 100644
--- a/xen/common/kexec.c
+++ b/xen/common/kexec.c
@@ -1182,7 +1182,7 @@ 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);
+    return !!test_bit(bit, &kexec_flags);
 }
 
 static int do_kexec_op_internal(unsigned long op,