[dpdk-dev] [PATCH] net/bnxt: fix null pointer dereferences

[dpdk-dev] [PATCH] net/bnxt: fix null pointer dereferences

[Kalesh A P]

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

Coverity reports that pointer "cpr->cp_ring_struct" may be
dereferenced with null value. This patch fixes this.

Coverity issue: 372063
Fixes: 5ed30db87fa8 ("net/bnxt: fix missing barriers in completion handling")
Cc: stable@dpdk.org

Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
Reviewed-by: Lance Richardson <lance.richardson@broadcom.com>
---
 drivers/net/bnxt/bnxt_irq.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/bnxt/bnxt_irq.c b/drivers/net/bnxt/bnxt_irq.c
index ebdac83..122a1f9 100644
--- a/drivers/net/bnxt/bnxt_irq.c
+++ b/drivers/net/bnxt/bnxt_irq.c
@@ -33,7 +33,6 @@ void bnxt_int_handler(void *param)
 		return;
 
 	raw_cons = cpr->cp_raw_cons;
-	cp_ring_size = cpr->cp_ring_struct->ring_size;
 	pthread_mutex_lock(&bp->def_cp_lock);
 	while (1) {
 		if (!cpr || !cpr->cp_ring_struct || !cpr->cp_db.doorbell) {
@@ -46,6 +45,7 @@ void bnxt_int_handler(void *param)
 			return;
 		}
 
+		cp_ring_size = cpr->cp_ring_struct->ring_size;
 		cons = RING_CMP(cpr->cp_ring_struct, raw_cons);
 		cmp = &cpr->cp_desc_ring[cons];
 
-- 
2.10.1

Re: [dpdk-dev] [PATCH] net/bnxt: fix null pointer dereferences

[Ajit Khaparde]

[-- Attachment #1: Type: text/plain, Size: 1535 bytes --]

On Tue, Jul 20, 2021 at 9:01 AM Kalesh A P <
kalesh-anakkur.purayil@broadcom.com> wrote:

> From: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
>
> Coverity reports that pointer "cpr->cp_ring_struct" may be
> dereferenced with null value. This patch fixes this.
>
> Coverity issue: 372063
> Fixes: 5ed30db87fa8 ("net/bnxt: fix missing barriers in completion
> handling")
> Cc: stable@dpdk.org
>
> Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
> Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
> Reviewed-by: Lance Richardson <lance.richardson@broadcom.com>
>
Patch applied to dpdk-next-net-brcm


> ---
>  drivers/net/bnxt/bnxt_irq.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/net/bnxt/bnxt_irq.c b/drivers/net/bnxt/bnxt_irq.c
> index ebdac83..122a1f9 100644
> --- a/drivers/net/bnxt/bnxt_irq.c
> +++ b/drivers/net/bnxt/bnxt_irq.c
> @@ -33,7 +33,6 @@ void bnxt_int_handler(void *param)
>                 return;
>
>         raw_cons = cpr->cp_raw_cons;
> -       cp_ring_size = cpr->cp_ring_struct->ring_size;
>         pthread_mutex_lock(&bp->def_cp_lock);
>         while (1) {
>                 if (!cpr || !cpr->cp_ring_struct || !cpr->cp_db.doorbell) {
> @@ -46,6 +45,7 @@ void bnxt_int_handler(void *param)
>                         return;
>                 }
>
> +               cp_ring_size = cpr->cp_ring_struct->ring_size;
>                 cons = RING_CMP(cpr->cp_ring_struct, raw_cons);
>                 cmp = &cpr->cp_desc_ring[cons];
>
> --
> 2.10.1
>
>