patches for DPDK stable branches
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From: Ferruh Yigit <ferruh.yigit@intel.com>
To: wangyunjian <wangyunjian@huawei.com>, dev@dpdk.org
Cc: david.marchand@redhat.com, jerinj@marvell.com,
	hkalra@marvell.com, jerry.lilijun@huawei.com,
	xudingke@huawei.com, stable@dpdk.org
Subject: Re: [dpdk-stable] [dpdk-dev] [PATCH] eal: fix dereference before null check
Date: Wed, 14 Oct 2020 18:02:49 +0100
Message-ID: <e8b83292-37af-f8b0-22fe-37b344ce4675@intel.com> (raw)
In-Reply-To: <1600511670-27576-1-git-send-email-wangyunjian@huawei.com>

On 9/19/2020 11:34 AM, wangyunjian wrote:
> From: Yunjian Wang <wangyunjian@huawei.com>
> 
> This patch fixes (dereference after null check) coverity issue.
> The intr_handle may be a null pointer which led to this issue.
> 
> Coverity issue: 357695, 357751
> Fixes: 05c4105738d8 ("trace: add interrupt tracepoints")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Yunjian Wang <wangyunjian@huawei.com>
> ---
>   lib/librte_eal/freebsd/eal_interrupts.c | 6 ++++--
>   lib/librte_eal/linux/eal_interrupts.c   | 6 ++++--
>   2 files changed, 8 insertions(+), 4 deletions(-)
> 
> diff --git a/lib/librte_eal/freebsd/eal_interrupts.c b/lib/librte_eal/freebsd/eal_interrupts.c
> index 6d53d33c8..028ab457a 100644
> --- a/lib/librte_eal/freebsd/eal_interrupts.c
> +++ b/lib/librte_eal/freebsd/eal_interrupts.c
> @@ -380,7 +380,8 @@ rte_intr_enable(const struct rte_intr_handle *intr_handle)
>   	}
>   
>   out:
> -	rte_eal_trace_intr_enable(intr_handle, rc);
> +	if (intr_handle)
> +		rte_eal_trace_intr_enable(intr_handle, rc);
>   	return rc;
>   }
>   
> @@ -418,7 +419,8 @@ rte_intr_disable(const struct rte_intr_handle *intr_handle)
>   		break;
>   	}
>   out:
> -	rte_eal_trace_intr_disable(intr_handle, rc);
> +	if (intr_handle)
> +		rte_eal_trace_intr_disable(intr_handle, rc);
>   	return rc;
>   }
>   
> diff --git a/lib/librte_eal/linux/eal_interrupts.c b/lib/librte_eal/linux/eal_interrupts.c
> index 13db5c4e8..e46443873 100644
> --- a/lib/librte_eal/linux/eal_interrupts.c
> +++ b/lib/librte_eal/linux/eal_interrupts.c
> @@ -725,7 +725,8 @@ rte_intr_enable(const struct rte_intr_handle *intr_handle)
>   		break;
>   	}
>   out:
> -	rte_eal_trace_intr_enable(intr_handle, rc);
> +	if (intr_handle)
> +		rte_eal_trace_intr_enable(intr_handle, rc);
>   	return rc;

It looks like whole function requires 'intr_handle' to be not NULL, so what do 
you think add following at the very beginning of the function and remove other 
'intr_handle' NULL checks from function:

if (intr_handle == NULL)
	return -1;

>   }
>   
> @@ -852,7 +853,8 @@ rte_intr_disable(const struct rte_intr_handle *intr_handle)
>   		break;
>   	}
>   out:
> -	rte_eal_trace_intr_disable(intr_handle, rc);
> +	if (intr_handle)
> +		rte_eal_trace_intr_disable(intr_handle, rc);
>   	return rc;
>   }
>   
> 


  reply	other threads:[~2020-10-14 17:03 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-19 10:34 wangyunjian
2020-10-14 17:02 ` Ferruh Yigit [this message]
2020-10-15  2:29   ` wangyunjian
2020-10-15  8:42 ` [dpdk-stable] [dpdk-dev] [PATCH v2] eal: fix dereference after " wangyunjian
2020-10-22 20:01   ` David Marchand
2020-10-28 21:18   ` [dpdk-stable] [EXT] " Harman Kalra
2020-10-29 16:09     ` David Marchand

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