[dpdk-dev] [PATCH] net/softnic: fix illegal memory access

Jasvinder Singh jasvinder.singh at intel.com
Mon Jul 16 14:41:47 CEST 2018


Fix pointer dereferencing and read after free (USE_AFTER_FREE).

Coverity issue: 302867
Fixes: bef50bcb1c47 ("net/softnic: implement start and stop")

Signed-off-by: Jasvinder Singh <jasvinder.singh at intel.com>
---
 drivers/net/softnic/rte_eth_softnic_swq.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/net/softnic/rte_eth_softnic_swq.c b/drivers/net/softnic/rte_eth_softnic_swq.c
index 1944fbb..604a2cc 100644
--- a/drivers/net/softnic/rte_eth_softnic_swq.c
+++ b/drivers/net/softnic/rte_eth_softnic_swq.c
@@ -36,9 +36,13 @@ softnic_swq_free(struct pmd_internals *p)
 void
 softnic_softnic_swq_free_keep_rxq_txq(struct pmd_internals *p)
 {
-	struct softnic_swq *swq;
+	for ( ; ; ) {
+		struct softnic_swq *swq;
+
+		swq = TAILQ_FIRST(&p->swq_list);
+		if (swq == NULL)
+			break;
 
-	TAILQ_FOREACH(swq, &p->swq_list, node) {
 		if ((strncmp(swq->name, "RXQ", strlen("RXQ")) == 0) ||
 			(strncmp(swq->name, "TXQ", strlen("TXQ")) == 0))
 			continue;
-- 
2.9.3



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