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From: David Marchand <david.marchand@redhat.com>
To: Thomas Monjalon <thomas@monjalon.net>
Cc: dev <dev@dpdk.org>, dpdk stable <stable@dpdk.org>,
	Ori Kam <orika@nvidia.com>,  Xiaoyun Li <xiaoyun.li@intel.com>,
	Aman Singh <aman.deep.singh@intel.com>,
	 Yuying Zhang <yuying.zhang@intel.com>,
	Ferruh Yigit <ferruh.yigit@intel.com>,
	 Wei Zhao <wei.zhao1@intel.com>
Subject: Re: [PATCH] app/testpmd: remove useless pointer checks
Date: Thu, 12 May 2022 09:19:35 +0200
Message-ID: <CAJFAV8x2eQYsa3ohMRdurf=w9vpdTo3ECRCQX8DgDkUV1SAi7Q@mail.gmail.com> (raw)
In-Reply-To: <7495551.lvqk35OSZv@thomas>

On Tue, Mar 29, 2022 at 11:26 AM Thomas Monjalon <thomas@monjalon.net> wrote:
> 24/03/2022 17:15, David Marchand:
> > Parameters to this static helper can't be NULL.
> > str has already been dereferenced in caller.
> > dst and size point to variable in stack.
> The same function is copy/pasted in several places.
> Why simplifying only this one? because of its static nature?
> Shouldn't we make it a common function as other string helpers?

Sorry, this thread fell through the cracks.

The issue was raised by covscan:

dpdk-21.11/app/test-pmd/cmdline_flow.c:7705: deref_ptr: Directly
dereferencing pointer "size".
dpdk-21.11/app/test-pmd/cmdline_flow.c:7711: check_after_deref:
Null-checking "size" suggests that it may be null, but it has already
been dereferenced on all paths leading to the check.
# 7709|       if ((src == NULL) ||
# 7710|           (dst == NULL) ||
# 7711|->         (size == NULL) ||
# 7712|           (*size == 0))
# 7713|           return -1;

As for the rest of the code, there might be more cleanups to do, as followups.

David Marchand

  reply	other threads:[~2022-05-12  7:19 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-03-24 16:15 David Marchand
2022-03-29  9:26 ` Thomas Monjalon
2022-05-12  7:19   ` David Marchand [this message]
2022-05-20 15:04     ` Ferruh Yigit

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