patch 'bus/fslmc: fix use after free' has been queued to stable release 24.11.3

[Kevin Traynor]

Hi,

FYI, your patch has been queued to stable release 24.11.3

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 07/23/25. 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/bbb4e92be549046a558d90eaeea2439a1e5b6ea1

Thanks.

Kevin

---
>From bbb4e92be549046a558d90eaeea2439a1e5b6ea1 Mon Sep 17 00:00:00 2001
From: Stephen Hemminger <stephen at networkplumber.org>
Date: Wed, 16 Apr 2025 07:58:14 -0700
Subject: [PATCH] bus/fslmc: fix use after free

[ upstream commit 1cad17c43079268d9e15db62b3a1edd42df8d81e ]

The cleanup loop would dereference the dpio_dev after freeing.
Use TAILQ_FOREACH_SAFE to fix that.
Found by building with sanitizer undefined flag.

Fixes: e55d0494ab98 ("bus/fslmc: support secondary process")

Signed-off-by: Stephen Hemminger <stephen at networkplumber.org>
Acked-by: Hemant Agrawal <hemant.agrawal at nxp.com>
---
 drivers/bus/fslmc/portal/dpaa2_hw_dpio.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/bus/fslmc/portal/dpaa2_hw_dpio.c b/drivers/bus/fslmc/portal/dpaa2_hw_dpio.c
index 2dfcf7a498..bc03b4dd05 100644
--- a/drivers/bus/fslmc/portal/dpaa2_hw_dpio.c
+++ b/drivers/bus/fslmc/portal/dpaa2_hw_dpio.c
@@ -39,4 +39,11 @@
 #include <mc/fsl_dpmng.h>
 
+#ifndef TAILQ_FOREACH_SAFE
+#define	TAILQ_FOREACH_SAFE(var, head, field, tvar)			\
+	for ((var) = TAILQ_FIRST((head));				\
+	    (var) && ((tvar) = TAILQ_NEXT((var), field), 1);		\
+	    (var) = (tvar))
+#endif
+
 #define NUM_HOST_CPUS RTE_MAX_LCORE
 
@@ -404,4 +411,5 @@ dpaa2_create_dpio_device(int vdev_fd,
 {
 	struct dpaa2_dpio_dev *dpio_dev = NULL;
+	struct dpaa2_dpio_dev *dpio_tmp;
 	struct vfio_region_info reg_info = { .argsz = sizeof(reg_info)};
 	struct qbman_swp_desc p_des;
@@ -589,5 +597,5 @@ err:
 
 	/* For each element in the list, cleanup */
-	TAILQ_FOREACH(dpio_dev, &dpio_dev_list, next) {
+	TAILQ_FOREACH_SAFE(dpio_dev, &dpio_dev_list, next, dpio_tmp) {
 		if (dpio_dev->dpio) {
 			dpio_disable(dpio_dev->dpio, CMD_PRI_LOW,
-- 
2.50.0

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2025-07-18 20:29:12.898276654 +0100
+++ 0052-bus-fslmc-fix-use-after-free.patch	2025-07-18 20:29:10.933860847 +0100
@@ -1 +1 @@
-From 1cad17c43079268d9e15db62b3a1edd42df8d81e Mon Sep 17 00:00:00 2001
+From bbb4e92be549046a558d90eaeea2439a1e5b6ea1 Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit 1cad17c43079268d9e15db62b3a1edd42df8d81e ]
+
@@ -11 +12,0 @@
-Cc: stable at dpdk.org
@@ -20 +21 @@
-index bad25a0ec2..e32471d8b5 100644
+index 2dfcf7a498..bc03b4dd05 100644
@@ -23 +24 @@
-@@ -40,4 +40,11 @@
+@@ -39,4 +39,11 @@
@@ -35 +36 @@
-@@ -413,4 +420,5 @@ dpaa2_create_dpio_device(int vdev_fd,
+@@ -404,4 +411,5 @@ dpaa2_create_dpio_device(int vdev_fd,
@@ -41 +42 @@
-@@ -598,5 +606,5 @@ err:
+@@ -589,5 +597,5 @@ err: