linux-kernel - Re: [PATCH, resend 1/1] x86/kernel: re-use %*ph specifier

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:	Sun, 11 Oct 2015 22:20:49 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
cc:	Ingo Molnar <mingo@...hat.com>, "H. Peter Anvin" <hpa@...or.com>,
	LKML <linux-kernel@...r.kernel.org>, x86@...nel.org,
	Steven Rostedt <rostedt@...dmis.org>,
	Peter Zijlstra <peterz@...radead.org>
Subject: Re: [PATCH, resend 1/1] x86/kernel: re-use %*ph specifier

On Fri, 2 Oct 2015, Andy Shevchenko wrote:

> %*ph specifier allows to dump data in hex format using the poiter to a buffer.
> This is suitable to use here.
> 
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> ---
>  arch/x86/kernel/jump_label.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/x86/kernel/jump_label.c b/arch/x86/kernel/jump_label.c
> index e565e0e..8da5254 100644
> --- a/arch/x86/kernel/jump_label.c
> +++ b/arch/x86/kernel/jump_label.c
> @@ -31,8 +31,8 @@ static void bug_at(unsigned char *ip, int line)
>  	 * Something went wrong. Crash the box, as something could be
>  	 * corrupting the kernel.
>  	 */
> -	pr_warning("Unexpected op at %pS [%p] (%02x %02x %02x %02x %02x) %s:%d\n",
> -	       ip, ip, ip[0], ip[1], ip[2], ip[3], ip[4], __FILE__, line);
> +	pr_warn("Unexpected op at %pS [%p] (%5ph) %s:%d\n",
> +		ip, ip, ip, __FILE__, line);

We really do not need the file printed here. We better have the
message starting with "jumplabel: Unexpected ...." And it should not
be a warning as we BUG() right after that. pr_crit() is probably the
right choice, though I wonder whether we should panic() right away
when that happens.

>  	BUG();

Thanks,

	tglx
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/