patches for DPDK stable branches
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From: Ferruh Yigit <ferruh.yigit@intel.com>
To: Aaron Conole <aconole@redhat.com>,
	David Marchand <david.marchand@redhat.com>
Cc: stable@dpdk.org, tianfei.zhang@intel.com,
	Wei Huang <wei.huang@intel.com>,
	qi.z.zhang@intel.com, rosen.xu@intel.com, dev@dpdk.org,
	John McNamara <john.mcnamara@intel.com>
Subject: Re: [dpdk-stable] [PATCH v2 1/1] raw/ifpga/base: check size before assigning
Date: Thu, 8 Apr 2021 10:38:50 +0100
Message-ID: <f64dd28b-8622-ab8f-41ba-fd93153fef40@intel.com> (raw)
In-Reply-To: <20210408085151.54996-2-wei.huang@intel.com>

On 4/8/2021 9:51 AM, Wei Huang wrote:
> In max10_staging_area_init(), variable "size" from fdt_get_reg() may
> be invalid, it should be checked before assigning to member variable
> "staging_area_size" of structure "intel_max10_device".
> 
> Coverity issue: 367480, 367482
> Fixes: 96ebfcf8125c ("raw/ifpga/base: add SPI and MAX10 device driver")
> 
> Signed-off-by: Wei Huang <wei.huang@intel.com>
> ---
> v2: check size before assigning to staging_area_size
> ---
>   drivers/raw/ifpga/base/opae_intel_max10.c | 2 +-
>   drivers/raw/ifpga/base/opae_intel_max10.h | 1 +
>   2 files changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/raw/ifpga/base/opae_intel_max10.c b/drivers/raw/ifpga/base/opae_intel_max10.c
> index 443e248fb3..c223fafa03 100644
> --- a/drivers/raw/ifpga/base/opae_intel_max10.c
> +++ b/drivers/raw/ifpga/base/opae_intel_max10.c
> @@ -593,7 +593,7 @@ static int max10_staging_area_init(struct intel_max10_device *dev)
>   			continue;
>   
>   		ret = fdt_get_reg(fdt_root, offset, 0, &start, &size);
> -		if (!ret) {
> +		if (!ret && (size <= MAX_STAGING_AREA_SIZE)) {
>   			dev->staging_area_base = start;
>   			dev->staging_area_size = size;
>   		}
> diff --git a/drivers/raw/ifpga/base/opae_intel_max10.h b/drivers/raw/ifpga/base/opae_intel_max10.h
> index 670683f017..e7142d6f0d 100644
> --- a/drivers/raw/ifpga/base/opae_intel_max10.h
> +++ b/drivers/raw/ifpga/base/opae_intel_max10.h
> @@ -182,6 +182,7 @@ struct opae_retimer_status {
>   #define   SBUS_VERSION			GENMASK(31, 16)
>   
>   #define DFT_MAX_SIZE		0x7e0000
> +#define MAX_STAGING_AREA_SIZE	0x3800000
>   
>   int max10_reg_read(struct intel_max10_device *dev,
>   	unsigned int reg, unsigned int *val);
> 

Hi Aaron, David,

The data flow is complex for this coverity issues [1], at least I can't confirm 
that change fixes the issue.

Are you aware of any way to confirm this coverity issue before merging it?

[1]
https://scan4.coverity.com/reports.htm#v26325/p10075/fileInstanceId=100181086&defectInstanceId=14238477&mergedDefectId=367480

  reply	other threads:[~2021-04-08  9:38 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-08  8:51 [dpdk-stable] [PATCH v2 0/1] Fix coverity issues reported in DPDK-26381 Wei Huang
2021-04-08  8:51 ` [dpdk-stable] [PATCH v2 1/1] raw/ifpga/base: check size before assigning Wei Huang
2021-04-08  9:38   ` Ferruh Yigit [this message]
2021-04-09 14:56     ` Aaron Conole
2021-04-14  2:46       ` Zhang, Tianfei
2021-04-14  7:42         ` Ferruh Yigit
2021-04-16  2:49           ` Huang, Wei
2021-05-17  8:50         ` Ferruh Yigit
2021-04-19  8:12   ` Zhang, Qi Z
2021-04-19 22:35     ` Ferruh Yigit
2021-04-20  0:13       ` Zhang, Tianfei
2021-04-20  1:00         ` Ferruh Yigit
2021-04-20  1:59           ` Xu, Rosen

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