From: Panu Matilainen <pmatilai-tJV4Np9+EQGJLDu7R2Hb2g@public.gmane.org>
To: dev-VfR2kkLFssw@public.gmane.org
Subject: Re: [PATCH 2/2] devargs: remove limit on parameters length
Date: Thu, 08 Jan 2015 11:15:47 +0200 [thread overview]
Message-ID: <54AE4AC3.80205@laiskiainen.org> (raw)
In-Reply-To: <20150107145900.2a139ee6@urahara>
On 01/08/2015 12:59 AM, Stephen Hemminger wrote:
> On Wed, 7 Jan 2015 14:03:29 +0100
> David Marchand <david.marchand-pdR9zngts4EAvxtiuMwx3w@public.gmane.org> wrote:
>
>> + buf = strdup(devargs_str);
>> + if (buf == NULL) {
>> + RTE_LOG(ERR, EAL, "cannot allocate temp memory for devargs\n");
>> + goto fail;
>> + }
>> +
>
> If string is only used in same function you might consider using strdupa() which avoids
> worrying about freeing in error paths.
>
It also "frees" you from having to worry about failures in the first
place because alloca() failures are not nice and catchable, its
undefined behavior.
If arbitrary length parameters is the goal then using the alloca()
family of functions is replacing a controlled failure with an
unpredictable crash.
- Panu -
next prev parent reply other threads:[~2015-01-08 9:15 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-07 13:03 [PATCH 0/2] remove limit on devargs parameters length David Marchand
[not found] ` <1420635809-30976-1-git-send-email-david.marchand-pdR9zngts4EAvxtiuMwx3w@public.gmane.org>
2015-01-07 13:03 ` [PATCH 1/2] devargs: indent and cleanup David Marchand
2015-01-07 13:03 ` [PATCH 2/2] devargs: remove limit on parameters length David Marchand
[not found] ` <1420635809-30976-3-git-send-email-david.marchand-pdR9zngts4EAvxtiuMwx3w@public.gmane.org>
2015-01-07 22:59 ` Stephen Hemminger
2015-01-08 8:19 ` David Marchand
2015-01-08 9:15 ` Panu Matilainen [this message]
2015-02-13 15:03 ` [PATCH v2 0/3] remove limit on devargs " David Marchand
[not found] ` <1423839795-29450-1-git-send-email-david.marchand-pdR9zngts4EAvxtiuMwx3w@public.gmane.org>
2015-02-13 15:03 ` [PATCH v2 1/3] devargs: indent and cleanup David Marchand
2015-02-13 15:03 ` [PATCH v2 2/3] devargs: remove limit on parameters length David Marchand
2015-02-13 15:03 ` [PATCH v2 3/3] app/test: fix devargs tests David Marchand
2015-02-18 12:44 ` [PATCH v2 0/3] remove limit on devargs parameters length Thomas Monjalon
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