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Re: [Xen-devel] [PATCH] xen/cmdline: Fix parse_boolean() for unadorned values

To: "Andrew Cooper" <andrew.cooper3@xxxxxxxxxx>
From: "Jan Beulich" <JBeulich@xxxxxxxx>
Date: Wed, 31 Jan 2018 03:46:01 -0700
Cc: Xen-devel <xen-devel@xxxxxxxxxxxxx>
Delivery-date: Wed, 31 Jan 2018 10:46:24 +0000
List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

>>> On 31.01.18 at 11:36, <andrew.cooper3@xxxxxxxxxx> wrote:
> A command line such as "cpuid=no-ibrsb,no-stibp" tickles a bug in
> parse_boolean() because the separating comma fails the NUL case.
> 
> Instead, check for slen == nlen which accounts for the boundary (if any)
> passed via the 'e' parameter.
> 
> Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>



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References:
- [Xen-devel] [PATCH] xen/cmdline: Fix parse_boolean() for unadorned values
  - From: Andrew Cooper

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