patches for DPDK stable branches
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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: nelio.laranjeiro@6wind.com, yvugenfi@redhat.com,
	ybendito@redhat.com, Maxime Coquelin <maxime.coquelin@redhat.com>,
	stable@dpdk.org
Subject: [dpdk-stable] [PATCH v4 2/5] app/testpmd: fix RSS key length
Date: Mon,  4 Oct 2021 16:30:14 +0200
Message-ID: <20211004143017.51488-3-maxime.coquelin@redhat.com> (raw)
In-Reply-To: <20211004143017.51488-1-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>
Acked-by: Xiaoyun Li <xiaoyun.li@intel.com>
Reviewed-by: Chenbo Xia <chenbo.xia@intel.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


       reply	other threads:[~2021-10-04 14:31 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20211004143017.51488-1-maxime.coquelin@redhat.com>
2021-10-04 14:30 ` Maxime Coquelin [this message]
2021-10-04 14:30 ` [dpdk-stable] [PATCH v4 3/5] app/testpmd: fix RSS type display Maxime Coquelin
2021-10-04 14:30 ` [dpdk-stable] [PATCH v4 4/5] net/mlx5: fix RSS RETA update Maxime Coquelin

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