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From: Maxime Coquelin <maxime.coquelin@redhat.com>
To: dev@dpdk.org, chenbo.xia@intel.com, amorenoz@redhat.com,
	david.marchand@redhat.com, andrew.rybchenko@oktetlabs.ru,
	ferruh.yigit@intel.com, michaelba@nvidia.com,
	viacheslavo@nvidia.com, xiaoyun.li@intel.com
Cc: stable@dpdk.org, nelio.laranjeiro@6wind.com, yvugenfi@redhat.com,
	ybendito@redhat.com, Maxime Coquelin <maxime.coquelin@redhat.com>
Subject: [dpdk-dev] [PATCH v2 2/5] app/testpmd: fix RSS key length
Date: Wed, 22 Sep 2021 11:57:39 +0200	[thread overview]
Message-ID: <20210922095742.229262-3-maxime.coquelin@redhat.com> (raw)
In-Reply-To: <20210922095742.229262-1-maxime.coquelin@redhat.com>

port_rss_hash_key_update() initializes rss_conf with the
RSS key configuration provided  by the user, but it calls
rte_eth_dev_rss_hash_conf_get() before calling
rte_eth_dev_rss_hash_update(), which overrides the parsed
RSS config.

While the RSS key value is set again after, this is not
the case of the key length. It could cause out of bounds
access if the key length parsed is smaller than the one
read from rte_eth_dev_rss_hash_conf_get().

This patch restores the key length before the
rte_eth_dev_rss_hash_update() call to ensure the RSS key
value/length pair is consistent.

Fixes: 8205e241b2b0 ("app/testpmd: add missing type to RSS hash commands")
Cc: stable@dpdk.org

Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
---
 app/test-pmd/config.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/app/test-pmd/config.c b/app/test-pmd/config.c
index 9c66329e96..611965769c 100644
--- a/app/test-pmd/config.c
+++ b/app/test-pmd/config.c
@@ -2854,7 +2854,7 @@ port_rss_hash_key_update(portid_t port_id, char rss_type[], uint8_t *hash_key,
 	unsigned int i;
 
 	rss_conf.rss_key = NULL;
-	rss_conf.rss_key_len = hash_key_len;
+	rss_conf.rss_key_len = 0;
 	rss_conf.rss_hf = 0;
 	for (i = 0; rss_type_table[i].str; i++) {
 		if (!strcmp(rss_type_table[i].str, rss_type))
@@ -2863,6 +2863,7 @@ port_rss_hash_key_update(portid_t port_id, char rss_type[], uint8_t *hash_key,
 	diag = rte_eth_dev_rss_hash_conf_get(port_id, &rss_conf);
 	if (diag == 0) {
 		rss_conf.rss_key = hash_key;
+		rss_conf.rss_key_len = hash_key_len;
 		diag = rte_eth_dev_rss_hash_update(port_id, &rss_conf);
 	}
 	if (diag == 0)
-- 
2.31.1


  parent reply	other threads:[~2021-09-22  9:59 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-22  9:57 [dpdk-dev] [PATCH v2 0/5] Virtio PMD RSS support & RSS fixes Maxime Coquelin
2021-09-22  9:57 ` [dpdk-dev] [PATCH v2 1/5] net/virtio: add initial RSS support Maxime Coquelin
2021-09-22 11:20   ` Andrew Rybchenko
2021-09-22 12:28     ` Maxime Coquelin
2021-09-23  7:35   ` Xia, Chenbo
2021-09-29  9:02     ` Maxime Coquelin
2021-09-22  9:57 ` Maxime Coquelin [this message]
2021-09-22 11:25   ` [dpdk-dev] [PATCH v2 2/5] app/testpmd: fix RSS key length Li, Xiaoyun
2021-09-23  7:52   ` Xia, Chenbo
2021-09-22  9:57 ` [dpdk-dev] [PATCH v2 3/5] app/testpmd: fix RSS type display Maxime Coquelin
2021-09-22 12:01   ` Li, Xiaoyun
2021-09-23  7:59   ` Xia, Chenbo
2021-09-22  9:57 ` [dpdk-dev] [PATCH v2 4/5] net/mlx5: fix RSS RETA update Maxime Coquelin
2021-09-22  9:57 ` [dpdk-dev] [PATCH v2 5/5] app/testpmd: add missing flow types in port info Maxime Coquelin
2021-09-22 11:31   ` Li, Xiaoyun
2021-09-29  7:27     ` Maxime Coquelin

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