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From: "Philippe Mathieu-Daudé" <philmd@linaro.org>
To: Gerd Hoffmann <kraxel@redhat.com>
Cc: qemu-devel@nongnu.org, qemu-ppc@nongnu.org, qemu-arm@nongnu.org,
	qemu-block@nongnu.org,
	"Marc-André Lureau" <marcandre.lureau@redhat.com>
Subject: Re: [PATCH 01/12] ui/console-vc: Replace sprintf() by g_strdup_printf()
Date: Thu, 11 Apr 2024 11:36:10 +0200	[thread overview]
Message-ID: <4c683f51-fe0f-4ef9-b424-aee8a859df0e@linaro.org> (raw)
In-Reply-To: <dx3zdfuwz7gam7brijaqfd4kg4uttybr2s2pjonhl4twyivhf3@afcjz4iulzcn>

On 11/4/24 09:47, Gerd Hoffmann wrote:
>    Hi,
> 
>>      Due to security concerns inherent in the design of sprintf(3),
>>      it is highly recommended that you use snprintf(3) instead.
> 
>> -    char response[40];
>> +    g_autofree char *response = NULL;
> 
>> -                    sprintf(response, "\033[%d;%dR",
>> +                    response = g_strdup_printf("\033[%d;%dR",
> 
> Any specific reason why you don't go with the recommendation above?
> 
> While using g_strdup_printf() isn't wrong it allocates memory which
> is not needed here because you can continue to use the stack buffer
> this way:
> 
> 	snprintf(response, sizeof(response), ...);

I thought GLib/GString was recommended for formatting, so choose
this thinking mostly about style. Indeed in this case snprintf()
is sufficient. I'll respin, thanks.

> 
> take care,
>    Gerd
> 



  reply	other threads:[~2024-04-11  9:37 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-04-10 16:06 [PATCH 00/12] misc: Remove sprintf() due to macOS deprecation Philippe Mathieu-Daudé
2024-04-10 16:06 ` [PATCH 01/12] ui/console-vc: Replace sprintf() by g_strdup_printf() Philippe Mathieu-Daudé
2024-04-11  6:58   ` Marc-André Lureau
2024-04-11  7:47   ` Gerd Hoffmann
2024-04-11  9:36     ` Philippe Mathieu-Daudé [this message]
2024-04-11 10:02       ` Gerd Hoffmann
2024-04-10 16:06 ` [PATCH 02/12] hw/vfio/pci: " Philippe Mathieu-Daudé
2024-04-12 15:25   ` Alex Williamson
2024-04-15 14:01     ` Cédric Le Goater
2024-04-10 16:06 ` [PATCH 03/12] hw/ppc/spapr: " Philippe Mathieu-Daudé
2024-04-10 16:06 ` [PATCH 04/12] hw/mips/malta: Replace sprintf() by g_string_append_printf() Philippe Mathieu-Daudé
2024-04-10 16:06 ` [PATCH 05/12] system/qtest: " Philippe Mathieu-Daudé
2024-04-11  6:30   ` Thomas Huth
2024-04-10 16:06 ` [PATCH 06/12] util/hexdump: Rename @offset argument in qemu_hexdump_line() Philippe Mathieu-Daudé
2024-04-10 16:06 ` [PATCH 07/12] util/hexdump: Have qemu_hexdump_line() return heap allocated buffer Philippe Mathieu-Daudé
2024-04-10 16:06 ` [PATCH 08/12] util/hexdump: Replace sprintf() by g_string_append_printf() Philippe Mathieu-Daudé
2024-04-10 16:06 ` [PATCH 09/12] hw/scsi/scsi-disk: Use qemu_hexdump_line() to avoid sprintf() Philippe Mathieu-Daudé
2024-04-10 16:06 ` [PATCH 10/12] hw/ide/atapi: " Philippe Mathieu-Daudé
2024-04-10 16:06 ` [PATCH 11/12] hw/dma/pl330: " Philippe Mathieu-Daudé
2024-04-10 16:06 ` [PATCH 12/12] backends/tpm: " Philippe Mathieu-Daudé
2024-04-10 19:51   ` Stefan Berger
2024-04-10 19:12 ` [PATCH 00/12] misc: Remove sprintf() due to macOS deprecation Richard Henderson
2024-04-10 22:27   ` BALATON Zoltan
2024-04-11  9:38     ` Philippe Mathieu-Daudé
2024-04-19 10:48       ` Daniel P. Berrangé

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