From: Corinna Vinschen <vinschen@redhat.com>
To: newlib@sourceware.org
Subject: Re: Fix modification of string literal by swprintf
Date: Fri, 09 Jun 2017 13:32:00 -0000 [thread overview]
Message-ID: <20170609133236.GA26770@calimero.vinschen.de> (raw)
In-Reply-To: <4dd496b3-b19c-8618-a701-5f1d15f1a602@foss.arm.com>
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On Jun 8 13:15, Thomas Preudhomme wrote:
> Please find his updated patch attached.
>
> Best regards,
>
> Thomas
> >From ee96a273969b0bccd308b81bcdf37a6fdefa06f6 Mon Sep 17 00:00:00 2001
> From: Silviu Baranga <silviu.baranga@arm.cm>
> Date: Mon, 5 Jun 2017 09:54:42 +0100
> Subject: [PATCH] Don't overread or write memory returned by _DTOA_R
>
> Don't over-read memory returned by _DTOA_R, and never write to it
> since the result might be a string literal.
>
> For example, when doing:
> swprintf(tt, 20, L"%.*f", 6, 0.0);
>
> we will get back "0".
>
> Instead, write the result returned by _DTOA_R to the output buffer.
> After this, write the 0 chars directly to the the output buffer
> (if there are any). This also has the (marginal) advantage that
> we read/write less memory overall.
Pushed.
Thanks,
Corinna
--
Corinna Vinschen
Cygwin Maintainer
Red Hat
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next prev parent reply other threads:[~2017-06-09 13:32 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-05 8:59 Thomas Preudhomme
2017-06-07 10:02 ` Corinna Vinschen
2017-06-07 10:41 ` Thomas Preudhomme
2017-06-08 12:15 ` Thomas Preudhomme
2017-06-09 13:32 ` Corinna Vinschen [this message]
2017-06-14 11:05 ` Renlin Li
2017-06-15 8:01 ` Thomas Preudhomme
2017-06-15 9:05 ` Renlin Li
2017-06-19 10:58 ` Corinna Vinschen
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