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authorkamil <kamil@NetBSD.org>2018-07-04 17:50:18 +0000
committerkamil <kamil@NetBSD.org>2018-07-04 17:50:18 +0000
commitb12896d9055bb746feb015903108821837fcdfac (patch)
tree75e3817aad705ce7697c5c0d055c2add972d54cd /sys/kern/sys_mqueue.c
parent48bbf57b25c8694489ce0e1aed9f04056d98ce9d (diff)
Avoid undefined behavior in mq_send1()
Do not shift a signed integer causing change of the signed bit. sys/kern/sys_mqueue.c:881:23, left shift of 1 by 31 places cannot be represented in type 'int' Detected with Kernel Undefined Behavior Sanitizer. Reported by <Harry Pantazis>
Diffstat (limited to 'sys/kern/sys_mqueue.c')
-rw-r--r--sys/kern/sys_mqueue.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/sys/kern/sys_mqueue.c b/sys/kern/sys_mqueue.c
index 2ff668dbe98..e5cf39c210b 100644
--- a/sys/kern/sys_mqueue.c
+++ b/sys/kern/sys_mqueue.c
@@ -1,4 +1,4 @@
-/* $NetBSD: sys_mqueue.c,v 1.41 2018/07/04 17:39:12 kamil Exp $ */
+/* $NetBSD: sys_mqueue.c,v 1.42 2018/07/04 17:50:18 kamil Exp $ */
/*
* Copyright (c) 2007-2011 Mindaugas Rasiukevicius <rmind at NetBSD org>
@@ -43,7 +43,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: sys_mqueue.c,v 1.41 2018/07/04 17:39:12 kamil Exp $");
+__KERNEL_RCSID(0, "$NetBSD: sys_mqueue.c,v 1.42 2018/07/04 17:50:18 kamil Exp $");
#include <sys/param.h>
#include <sys/types.h>
@@ -878,7 +878,7 @@ mq_send1(mqd_t mqdes, const char *msg_ptr, size_t msg_len, u_int msg_prio,
KASSERT(idx != MQ_PQRESQ);
TAILQ_INSERT_TAIL(&mq->mq_head[idx], msg, msg_queue);
- mq->mq_bitmap |= (1 << --idx);
+ mq->mq_bitmap |= (1U << --idx);
} else {
mqueue_linear_insert(mq, msg);
}