patch 'net/virtio: fix empty devargs parsing' has been queued to stable release 21.11.4

[Kevin Traynor]

Hi,

FYI, your patch has been queued to stable release 21.11.4

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 03/20/23. So please
shout if anyone has objections.

Also note that after the patch there's a diff of the upstream commit vs the
patch applied to the branch. This will indicate if there was any rebasing
needed to apply to the stable branch. If there were code changes for rebasing
(ie: not only metadata diffs), please double check that the rebase was
correctly done.

Queued patches are on a temporary branch at:
https://github.com/kevintraynor/dpdk-stable

This queued commit can be viewed at:
https://github.com/kevintraynor/dpdk-stable/commit/cbb039980138c4626c2dfb4e56a7ee051e6c9e6b

Thanks.

Kevin

---
>From cbb039980138c4626c2dfb4e56a7ee051e6c9e6b Mon Sep 17 00:00:00 2001
From: Chengwen Feng <fengchengwen at huawei.com>
Date: Thu, 2 Mar 2023 07:50:10 +0000
Subject: [PATCH] net/virtio: fix empty devargs parsing

[ upstream commit 1c1b35b59b4cee8836f34498b7c55b49de39d7b3 ]

The rte_kvargs_process() was used to parse KV pairs, it also supports
to parse 'only keys' (e.g. socket_id) type. And the callback function
parameter 'value' is NULL when parsed 'only keys'.

This patch fixes segment fault when parse input args with 'only keys'
(e.g. vectorized,vdpa).

Fixes: 4710e16a4a7b ("net/virtio: add parameter to enable vectorized path")
Fixes: 44d7b2e87b69 ("net/virtio: refactor devargs parsing")
Fixes: 440f03c25378 ("net/virtio: skip device probe in vDPA mode")

Signed-off-by: Chengwen Feng <fengchengwen at huawei.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin at redhat.com>
---
 drivers/net/virtio/virtio_ethdev.c     | 3 +++
 drivers/net/virtio/virtio_pci_ethdev.c | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c
index 38bfe050b5..df9ee9fde6 100644
--- a/drivers/net/virtio/virtio_ethdev.c
+++ b/drivers/net/virtio/virtio_ethdev.c
@@ -2457,4 +2457,7 @@ static int vectorized_check_handler(__rte_unused const char *key,
 		const char *value, void *ret_val)
 {
+	if (value == NULL || ret_val == NULL)
+		return -EINVAL;
+
 	if (strcmp(value, "1") == 0)
 		*(int *)ret_val = 1;
diff --git a/drivers/net/virtio/virtio_pci_ethdev.c b/drivers/net/virtio/virtio_pci_ethdev.c
index 1f6bdeddda..f786ac2c9e 100644
--- a/drivers/net/virtio/virtio_pci_ethdev.c
+++ b/drivers/net/virtio/virtio_pci_ethdev.c
@@ -149,4 +149,7 @@ static int vdpa_check_handler(__rte_unused const char *key,
 		const char *value, void *ret_val)
 {
+	if (value == NULL || ret_val == NULL)
+		return -EINVAL;
+
 	if (strcmp(value, "1") == 0)
 		*(int *)ret_val = 1;
-- 
2.39.2

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2023-03-15 14:30:21.280302618 +0000
+++ 0028-net-virtio-fix-empty-devargs-parsing.patch	2023-03-15 14:30:20.592123724 +0000
@@ -1 +1 @@
-From 1c1b35b59b4cee8836f34498b7c55b49de39d7b3 Mon Sep 17 00:00:00 2001
+From cbb039980138c4626c2dfb4e56a7ee051e6c9e6b Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit 1c1b35b59b4cee8836f34498b7c55b49de39d7b3 ]
+
@@ -16 +17,0 @@
-Cc: stable at dpdk.org
@@ -26 +27 @@
-index dc6856d749..ae84d313be 100644
+index 38bfe050b5..df9ee9fde6 100644
@@ -29 +30 @@
-@@ -2057,4 +2057,7 @@ static int vectorized_check_handler(__rte_unused const char *key,
+@@ -2457,4 +2457,7 @@ static int vectorized_check_handler(__rte_unused const char *key,
@@ -38 +39 @@
-index abc63b0935..9b4b846f8a 100644
+index 1f6bdeddda..f786ac2c9e 100644