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From: wangyunjian <wangyunjian@huawei.com>
To: Ferruh Yigit <ferruh.yigit@intel.com>, "dev@dpdk.org" <dev@dpdk.org>
Cc: "david.marchand@redhat.com" <david.marchand@redhat.com>,
	"jerinj@marvell.com" <jerinj@marvell.com>,
	"hkalra@marvell.com" <hkalra@marvell.com>,
	"Lilijun (Jerry)" <jerry.lilijun@huawei.com>,
	xudingke <xudingke@huawei.com>,
	"stable@dpdk.org" <stable@dpdk.org>
Subject: Re: [dpdk-dev] [dpdk-stable] [PATCH] eal: fix dereference before null check
Date: Thu, 15 Oct 2020 02:29:12 +0000
Message-ID: <34EFBCA9F01B0748BEB6B629CE643AE60DAAC966@DGGEMM533-MBX.china.huawei.com> (raw)
In-Reply-To: <e8b83292-37af-f8b0-22fe-37b344ce4675@intel.com>

> -----Original Message-----
> From: Ferruh Yigit [mailto:ferruh.yigit@intel.com]
> Sent: Thursday, October 15, 2020 1:03 AM
> To: wangyunjian <wangyunjian@huawei.com>; dev@dpdk.org
> Cc: david.marchand@redhat.com; jerinj@marvell.com; hkalra@marvell.com;
> Lilijun (Jerry) <jerry.lilijun@huawei.com>; xudingke <xudingke@huawei.com>;
> stable@dpdk.org
> Subject: Re: [dpdk-stable] [dpdk-dev] [PATCH] eal: fix dereference before null
> check
> 
> 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;

Agree, I will add them in next version.

Thanks,
Yunjian

> 
> >   }
> >
> > @@ -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:[~2020-10-15  2:29 UTC|newest]

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

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