[dpdk-stable] patch 'mbuf: check shared memory before dumping dynamic space' has been queued to stable release 20.11.2

[Xueming Li]

Hi,

FYI, your patch has been queued to stable release 20.11.2

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 06/14/21. 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/steevenlee/dpdk

This queued commit can be viewed at:
https://github.com/steevenlee/dpdk/commit/f532cbbedb9ef66ecf31ff9c579cd7b77c0ee839

Thanks.

Xueming Li <xuemingl at nvidia.com>

---
>From f532cbbedb9ef66ecf31ff9c579cd7b77c0ee839 Mon Sep 17 00:00:00 2001
From: Chengwen Feng <fengchengwen at huawei.com>
Date: Fri, 23 Apr 2021 16:11:04 +0800
Subject: [PATCH] mbuf: check shared memory before dumping dynamic space
Cc: Luca Boccassi <bluca at debian.org>

[ upstream commit d4902ed31c63b002268e593536b13b84d4fdac9a ]

Because mbuf dyn shared memory was allocated runtime, so it's
necessary to check validity when dump mbuf dyn info.

Also this patch adds an error logging when init shared memory fail.

Fixes: 4958ca3a443a ("mbuf: support dynamic fields and flags")

Signed-off-by: Chengwen Feng <fengchengwen at huawei.com>
Signed-off-by: Min Hu (Connor) <humin29 at huawei.com>
Acked-by: Olivier Matz <olivier.matz at 6wind.com>
---
 lib/librte_mbuf/rte_mbuf_dyn.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/lib/librte_mbuf/rte_mbuf_dyn.c b/lib/librte_mbuf/rte_mbuf_dyn.c
index 7d5e942bf0..ca46eb279e 100644
--- a/lib/librte_mbuf/rte_mbuf_dyn.c
+++ b/lib/librte_mbuf/rte_mbuf_dyn.c
@@ -115,8 +115,10 @@ init_shared_mem(void)
 	} else {
 		mz = rte_memzone_lookup(RTE_MBUF_DYN_MZNAME);
 	}
-	if (mz == NULL)
+	if (mz == NULL) {
+		RTE_LOG(ERR, MBUF, "Failed to get mbuf dyn shared memory\n");
 		return -1;
+	}
 
 	shm = mz->addr;
 
@@ -525,7 +527,11 @@ void rte_mbuf_dyn_dump(FILE *out)
 	size_t i;
 
 	rte_mcfg_tailq_write_lock();
-	init_shared_mem();
+	if (init_shared_mem() < 0) {
+		rte_mcfg_tailq_write_unlock();
+		return;
+	}
+
 	fprintf(out, "Reserved fields:\n");
 	mbuf_dynfield_list = RTE_TAILQ_CAST(
 		mbuf_dynfield_tailq.head, mbuf_dynfield_list);
-- 
2.25.1

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2021-06-12 06:53:56.832127300 +0800
+++ 0005-mbuf-check-shared-memory-before-dumping-dynamic-spac.patch	2021-06-12 06:53:56.000000000 +0800
@@ -1 +1 @@
-From d4902ed31c63b002268e593536b13b84d4fdac9a Mon Sep 17 00:00:00 2001
+From f532cbbedb9ef66ecf31ff9c579cd7b77c0ee839 Mon Sep 17 00:00:00 2001
@@ -4,0 +5,3 @@
+Cc: Luca Boccassi <bluca at debian.org>
+
+[ upstream commit d4902ed31c63b002268e593536b13b84d4fdac9a ]
@@ -12 +14,0 @@
-Cc: stable at dpdk.org
@@ -18 +20 @@
- lib/mbuf/rte_mbuf_dyn.c | 10 ++++++++--
+ lib/librte_mbuf/rte_mbuf_dyn.c | 10 ++++++++--
@@ -21 +23 @@
-diff --git a/lib/mbuf/rte_mbuf_dyn.c b/lib/mbuf/rte_mbuf_dyn.c
+diff --git a/lib/librte_mbuf/rte_mbuf_dyn.c b/lib/librte_mbuf/rte_mbuf_dyn.c
@@ -23,2 +25,2 @@
---- a/lib/mbuf/rte_mbuf_dyn.c
-+++ b/lib/mbuf/rte_mbuf_dyn.c
+--- a/lib/librte_mbuf/rte_mbuf_dyn.c
++++ b/lib/librte_mbuf/rte_mbuf_dyn.c