linux-kernel - Re: [PATCH 3/5] x86/dumpstack: Improve opcodes dumping in the Code: section

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: Windows password security audit tool. GUI, reports in PDF.

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

Date:   Mon, 19 Feb 2018 16:02:19 -0600
From:   Josh Poimboeuf <jpoimboe@...hat.com>
To:     Borislav Petkov <bp@...en8.de>
Cc:     X86 ML <x86@...nel.org>, Peter Zijlstra <peterz@...radead.org>,
        Andy Lutomirski <luto@...capital.net>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/5] x86/dumpstack: Improve opcodes dumping in the Code:
 section

On Mon, Feb 19, 2018 at 09:28:24PM +0100, Borislav Petkov wrote:
>  bool in_task_stack(unsigned long *stack, struct task_struct *task,
> @@ -358,8 +362,8 @@ void die(const char *str, struct pt_regs *regs, long err)
>  
>  static int __init code_bytes_setup(char *s)
>  {
> -	ssize_t ret;
>  	unsigned long val;
> +	ssize_t ret;
>  
>  	if (!s)
>  		return -EINVAL;
> @@ -372,35 +376,37 @@ static int __init code_bytes_setup(char *s)
>  	if (code_bytes > 8192)
>  		code_bytes = 8192;
>  
> +	if (code_bytes > OPCODE_BUFSIZE) {
> +		u8 *new_buf = kzalloc(code_bytes, GFP_KERNEL);
> +		if (!new_buf)
> +			return -EINVAL;

S/EINVAL/ENOMEM/ ?

Otherwise the code looks good to me, and I like the new feature.

-- 
Josh