[dpdk-stable] [PATCH 19.11 3/9] net/bnxt: fix double free in port start failure

[Kalesh A P]

From: Kalesh AP <kalesh-anakkur.purayil at broadcom.com>

[ upstream commit 39a03b401e4a72a118bae60c5834be2b6913098e ]

During port start when bnxt_start_nic() fails, it tries to free
"intr_handle->intr_vec" but the variable is not set to NULL after that.
If port start fails, driver invokes bnxt_dev_stop() which will lead
to a double free of "intr_handle->intr_vec".

Fix it by removing the call to free "intr_handle->intr_vec" in the
bnxt_start_nic() failure path as it is anyway doing in bnxt_dev_stop().

Fixes: 9d276b439aaf ("net/bnxt: fix error handling in device start")

Signed-off-by: Kalesh AP <kalesh-anakkur.purayil at broadcom.com>
Reviewed-by: Somnath Kotur <somnath.kotur at broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde at broadcom.com>
---
 drivers/net/bnxt/bnxt_ethdev.c | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/drivers/net/bnxt/bnxt_ethdev.c b/drivers/net/bnxt/bnxt_ethdev.c
index 26cc3dc..bcdf1fc 100644
--- a/drivers/net/bnxt/bnxt_ethdev.c
+++ b/drivers/net/bnxt/bnxt_ethdev.c
@@ -442,7 +442,7 @@ static int bnxt_init_chip(struct bnxt *bp)
 			PMD_DRV_LOG(ERR, "Failed to allocate %d rx_queues"
 				" intr_vec", bp->eth_dev->data->nb_rx_queues);
 			rc = -ENOMEM;
-			goto err_disable;
+			goto err_out;
 		}
 		PMD_DRV_LOG(DEBUG, "intr_handle->intr_vec = %p "
 			"intr_handle->nb_efd = %d intr_handle->max_intr = %d\n",
@@ -462,13 +462,13 @@ static int bnxt_init_chip(struct bnxt *bp)
 #ifndef RTE_EXEC_ENV_FREEBSD
 	/* In FreeBSD OS, nic_uio driver does not support interrupts */
 	if (rc)
-		goto err_free;
+		goto err_out;
 #endif
 
 	rc = bnxt_get_hwrm_link_config(bp, &new);
 	if (rc) {
 		PMD_DRV_LOG(ERR, "HWRM Get link config failure rc: %x\n", rc);
-		goto err_free;
+		goto err_out;
 	}
 
 	if (!bp->link_info.link_up) {
@@ -476,17 +476,13 @@ static int bnxt_init_chip(struct bnxt *bp)
 		if (rc) {
 			PMD_DRV_LOG(ERR,
 				"HWRM link config failure rc: %x\n", rc);
-			goto err_free;
+			goto err_out;
 		}
 	}
 	bnxt_print_link_info(bp->eth_dev);
 
 	return 0;
 
-err_free:
-	rte_free(intr_handle->intr_vec);
-err_disable:
-	rte_intr_efd_disable(intr_handle);
 err_out:
 	/* Some of the error status returned by FW may not be from errno.h */
 	if (rc > 0)
-- 
2.10.1