[dpdk-stable] patch 'net/vdev_netvsc: readlink inputs cannot be aliased' has been queued to stable release 18.02.2

[luca.boccassi at gmail.com]

Hi,

FYI, your patch has been queued to stable release 18.02.2

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 05/16/18. So please
shout if anyone has objections.

Thanks.

Luca Boccassi

---
>From 66662328204491df9f99bc21ad6b6d32cdae1c6e Mon Sep 17 00:00:00 2001
From: Andy Green <andy at warmcat.com>
Date: Mon, 14 May 2018 13:00:52 +0800
Subject: [PATCH] net/vdev_netvsc: readlink inputs cannot be aliased

[ upstream commit 2e4d2e563f23930b06c24b7bc543bf04321d81f7 ]

drivers/net/vdev_netvsc/vdev_netvsc.c:335:2:error:
passing argument 2 to restrict-qualified parameter aliases with argument 1
  ret = readlink(buf, buf, size);
  ^~~

Fixes: e7dc5d7becc5 ("net/vdev_netvsc: implement core functionality")

Signed-off-by: Andy Green <andy at warmcat.com>
Acked-by: Pablo de Lara <pablo.de.lara.guarch at intel.com>
---
 drivers/net/vdev_netvsc/vdev_netvsc.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/net/vdev_netvsc/vdev_netvsc.c b/drivers/net/vdev_netvsc/vdev_netvsc.c
index 75aec8980..f746433b5 100644
--- a/drivers/net/vdev_netvsc/vdev_netvsc.c
+++ b/drivers/net/vdev_netvsc/vdev_netvsc.c
@@ -327,12 +327,15 @@ static int
 vdev_netvsc_sysfs_readlink(char *buf, size_t size, const char *if_name,
 			   const char *relpath)
 {
+	struct vdev_netvsc_ctx *ctx;
+	char in[RTE_MAX(sizeof(ctx->yield), 256u)];
 	int ret;
 
-	ret = snprintf(buf, size, "/sys/class/net/%s/%s", if_name, relpath);
-	if (ret == -1 || (size_t)ret >= size)
+	ret = snprintf(in, sizeof(in) - 1, "/sys/class/net/%s/%s",
+		       if_name, relpath);
+	if (ret == -1 || (size_t)ret >= sizeof(in))
 		return -ENOBUFS;
-	ret = readlink(buf, buf, size);
+	ret = readlink(in, buf, size);
 	if (ret == -1)
 		return -errno;
 	if ((size_t)ret >= size - 1)
-- 
2.14.2