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From: Johannes Berg <johannes@sipsolutions.net>
To: Kees Cook <kees@kernel.org>, kernel test robot <lkp@intel.com>,
	Azeem Shaikh <azeemshaikh38@gmail.com>,
	Maxim Krasnyansky <maxk@qti.qualcomm.com>
Cc: oe-kbuild-all@lists.linux.dev, linux-hardening@vger.kernel.org,
	 linux-kernel@vger.kernel.org,
	Richard Weinberger <richard@nod.at>,
	Anton Ivanov <anton.ivanov@cambridgegreys.com>,
	linux-um@lists.infradead.org
Subject: Re: [PATCH] uml: Replace all non-returning strlcpy with strscpy
Date: Wed, 31 May 2023 08:18:00 +0200	[thread overview]
Message-ID: <8033fb8f9677cf9aae411e97eb554d251ca03011.camel@sipsolutions.net> (raw)
In-Reply-To: <09A0C6FA-669F-4B73-9620-43AEA17E5D0C@kernel.org>



> -		strlcpy(ifr.ifr_name, pri->dev_name,
> sizeof(ifr.ifr_name));
> +		strscpy(ifr.ifr_name, pri->dev_name,
> sizeof(ifr.ifr_name));
> 

> >   arch/um/os-Linux/drivers/tuntap_user.c: In function 'tuntap_open':
> > > > arch/um/os-Linux/drivers/tuntap_user.c:149:17: error: implicit declaration of function 'strscpy'; did you mean 'strncpy'? [-Werror=implicit-function-declaration]
> >     149 |                 strscpy(ifr.ifr_name, pri->dev_name, sizeof(ifr.ifr_name));
> >         |                 ^~~~~~~
> >         |                 strncpy
> >   cc1: some warnings being treated as errors
> 
> Ah, yeah, this is another "not actually in the kernel" cases. Let's ignore this strlcpy for now.
> 

Well, strlcpy() isn't part of libc either, so all this would need is to
add it to user.h just like strlcpy() is now?

johannes

WARNING: multiple messages have this Message-ID (diff)
From: Johannes Berg <johannes@sipsolutions.net>
To: Kees Cook <kees@kernel.org>, kernel test robot <lkp@intel.com>,
	Azeem Shaikh <azeemshaikh38@gmail.com>,
	Maxim Krasnyansky <maxk@qti.qualcomm.com>
Cc: oe-kbuild-all@lists.linux.dev, linux-hardening@vger.kernel.org,
	 linux-kernel@vger.kernel.org,
	Richard Weinberger <richard@nod.at>,
	Anton Ivanov <anton.ivanov@cambridgegreys.com>,
	linux-um@lists.infradead.org
Subject: Re: [PATCH] uml: Replace all non-returning strlcpy with strscpy
Date: Wed, 31 May 2023 08:18:00 +0200	[thread overview]
Message-ID: <8033fb8f9677cf9aae411e97eb554d251ca03011.camel@sipsolutions.net> (raw)
In-Reply-To: <09A0C6FA-669F-4B73-9620-43AEA17E5D0C@kernel.org>



> -		strlcpy(ifr.ifr_name, pri->dev_name,
> sizeof(ifr.ifr_name));
> +		strscpy(ifr.ifr_name, pri->dev_name,
> sizeof(ifr.ifr_name));
> 

> >   arch/um/os-Linux/drivers/tuntap_user.c: In function 'tuntap_open':
> > > > arch/um/os-Linux/drivers/tuntap_user.c:149:17: error: implicit declaration of function 'strscpy'; did you mean 'strncpy'? [-Werror=implicit-function-declaration]
> >     149 |                 strscpy(ifr.ifr_name, pri->dev_name, sizeof(ifr.ifr_name));
> >         |                 ^~~~~~~
> >         |                 strncpy
> >   cc1: some warnings being treated as errors
> 
> Ah, yeah, this is another "not actually in the kernel" cases. Let's ignore this strlcpy for now.
> 

Well, strlcpy() isn't part of libc either, so all this would need is to
add it to user.h just like strlcpy() is now?

johannes

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  reply	other threads:[~2023-05-31  6:40 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-05-30 16:40 [PATCH] uml: Replace all non-returning strlcpy with strscpy Azeem Shaikh
2023-05-30 16:40 ` Azeem Shaikh
2023-05-30 23:21 ` Kees Cook
2023-05-31  3:18 ` kernel test robot
2023-05-31  3:18   ` kernel test robot
2023-05-31  4:41   ` Kees Cook
2023-05-31  4:41     ` Kees Cook
2023-05-31  6:18     ` Johannes Berg [this message]
2023-05-31  6:18       ` Johannes Berg
2023-05-31  6:26       ` Richard Weinberger
2023-05-31  6:26         ` Richard Weinberger
2023-05-31  6:23     ` Richard Weinberger
2023-05-31  6:23       ` Richard Weinberger
2023-05-31  8:05       ` Geert Uytterhoeven
2023-05-31  8:05         ` Geert Uytterhoeven
2023-05-31 14:48         ` Azeem Shaikh
2023-05-31 14:48           ` Azeem Shaikh
2023-06-05 20:07           ` Richard Weinberger
2023-06-05 20:07             ` Richard Weinberger

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