linux-kernel - Re: [PATCH] kexec: add further check to crashkernel

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Date:	Tue, 13 Mar 2012 11:27:30 -0700
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	DuanZhenzhong <zhenzhong.duan@...cle.com>
cc:	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] kexec: add further check to crashkernel

DuanZhenzhong <zhenzhong.duan@...cle.com> writes:

> From: Zhenzhong Duan <zhenzhong.duan@...cle.com>
>
> When add crashkernel=2M-256M, kernel don't give any warning.
> This is misleading sometimes.

That seems reasonable.

Andrew do you want to carry this one.  I don't have a good tree to stash
this in.

Acked-by: "Eric W. Biederman" <ebiederm@...ssion.com>

> Signed-off-by: Zhenzhong Duan <zhenzhong.duan@...cle.com>
> ---
> kernel/kexec.c |    4 ++++
> 1 files changed, 4 insertions(+), 0 deletions(-)
>
> diff --git a/kernel/kexec.c b/kernel/kexec.c
> index 7b08867..0a6d147 100644
> --- a/kernel/kexec.c
> +++ b/kernel/kexec.c
> @@ -1359,6 +1359,10 @@ static int __init parse_crashkernel_simple(char 		*cmdline,
>
> 	if (*cur == '@')
> 		*crash_base = memparse(cur+1, &cur);
> +	else if (*cur != ' ' && *cur != '\0') {
> +		pr_warning("crashkernel: unrecognized char\n");
> +		return -EINVAL;
> +	}
>
> 	return 0;
> }
> -- 1.7.3
--
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