From: Jan Beulich <jbeulich@suse.com>
Date: Tue, 23 Jan 2018 09:44:43 +0000 (+0100)
Subject: add check to cpumask_of()
X-Git-Tag: archive/raspbian/4.11.1-1+rpi1~1^2~66^2~716
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=e8bf5addc9aa4730f2c5ed481bf6d40545c8d65b;p=xen.git

add check to cpumask_of()

Just like any other function's CPU inputs, the one here shouldn't go
unchecked.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Wei Liu <wei.liu2@citrix.com>
---

diff --git a/xen/include/xen/cpumask.h b/xen/include/xen/cpumask.h
index 3f340d619a..42340a098e 100644
--- a/xen/include/xen/cpumask.h
+++ b/xen/include/xen/cpumask.h
@@ -304,7 +304,9 @@ extern const unsigned long
 
 static inline const cpumask_t *cpumask_of(unsigned int cpu)
 {
-	const unsigned long *p = cpu_bit_bitmap[1 + cpu % BITS_PER_LONG];
+	const unsigned long *p = cpu_bit_bitmap[1 + cpumask_check(cpu) %
+                                                   BITS_PER_LONG];
+
 	return (const cpumask_t *)(p - cpu / BITS_PER_LONG);
 }