patch 'baseband/la12xx: fix use after free in modem config' has been queued to stable release 22.11.7

[luca.boccassi at gmail.com]

Hi,

FYI, your patch has been queued to stable release 22.11.7

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 10/25/24. 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/bluca/dpdk-stable

This queued commit can be viewed at:
https://github.com/bluca/dpdk-stable/commit/38eba244a3d5407f508a1dbd8a1b17f47337c82c

Thanks.

Luca Boccassi

---
>From 38eba244a3d5407f508a1dbd8a1b17f47337c82c Mon Sep 17 00:00:00 2001
From: Stephen Hemminger <stephen at networkplumber.org>
Date: Tue, 8 Oct 2024 09:47:19 -0700
Subject: [PATCH] baseband/la12xx: fix use after free in modem config
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

[ upstream commit 6ffb34498913f84713e98d6a2a21d2a86028a604 ]

The info pointer (hp) could get freed twice.
Fix by nulling after free.

In function 'setup_la12xx_dev',
inlined from 'la12xx_bbdev_create' at
	../drivers/baseband/la12xx/bbdev_la12xx.c:1029:8,
inlined from 'la12xx_bbdev_probe' at
	../drivers/baseband/la12xx/bbdev_la12xx.c:1075:9:
../drivers/baseband/la12xx/bbdev_la12xx.c:901:9:
	error: pointer 'hp_info' may be used after 'rte_free'
	[-Werror=use-after-free]
901 |         rte_free(hp);
    |         ^~~~~~~~~~~~
../drivers/baseband/la12xx/bbdev_la12xx.c:791:17:
	note: call to 'rte_free' here
791 |                 rte_free(hp);
    |                 ^~~~~~~~~~~~

Fixes: 24d0ba22546e ("baseband/la12xx: add queue and modem config")

Signed-off-by: Stephen Hemminger <stephen at networkplumber.org>
Reviewed-by: Hemant Agrawal <hemant.agrawal at nxp.com>
Acked-by: Morten Brørup <mb at smartsharesystems.com>
Acked-by: Konstantin Ananyev <konstantin.ananyev at huawei.com>
Acked-by: Wathsala Vithanage <wathsala.vithanage at arm.com>
---
 drivers/baseband/la12xx/bbdev_la12xx.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/baseband/la12xx/bbdev_la12xx.c b/drivers/baseband/la12xx/bbdev_la12xx.c
index 1a56e73abd..cad6f9490e 100644
--- a/drivers/baseband/la12xx/bbdev_la12xx.c
+++ b/drivers/baseband/la12xx/bbdev_la12xx.c
@@ -789,6 +789,7 @@ setup_la12xx_dev(struct rte_bbdev *dev)
 		ipc_priv->hugepg_start.size = hp->len;
 
 		rte_free(hp);
+		hp = NULL;
 	}
 
 	dev_ipc = open_ipc_dev(priv->modem_id);
-- 
2.45.2

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2024-10-23 22:16:40.895052857 +0100
+++ 0009-baseband-la12xx-fix-use-after-free-in-modem-config.patch	2024-10-23 22:16:40.439940407 +0100
@@ -1 +1 @@
-From 6ffb34498913f84713e98d6a2a21d2a86028a604 Mon Sep 17 00:00:00 2001
+From 38eba244a3d5407f508a1dbd8a1b17f47337c82c Mon Sep 17 00:00:00 2001
@@ -8,0 +9,2 @@
+[ upstream commit 6ffb34498913f84713e98d6a2a21d2a86028a604 ]
+
@@ -28 +29,0 @@
-Cc: stable at dpdk.org
@@ -40 +41 @@
-index af4b4f1e9a..2432cdf884 100644
+index 1a56e73abd..cad6f9490e 100644