linux-kernel - Re: [PATCH v3] exec: load_script: Do not exec truncated interpreter path

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Message-ID: <CAHk-=wjk29MeO9PuyirONZMr75-H6LtfNe6WghOXT7n+f5-RTA@mail.gmail.com>
Date:   Fri, 15 Feb 2019 08:39:37 -0800
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Oleg Nesterov <oleg@...hat.com>
Cc:     Kees Cook <keescook@...omium.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Samuel Dionne-Riel <samuel@...nne-riel.com>,
        Richard Weinberger <richard.weinberger@...il.com>,
        Graham Christensen <graham@...hamc.com>,
        Michal Hocko <mhocko@...e.com>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3] exec: load_script: Do not exec truncated interpreter path

On Fri, Feb 15, 2019 at 8:18 AM Oleg Nesterov <oleg@...hat.com> wrote:
>
> Not sure. Consider a script file which has a single line
>
>         #!/path/to/interpreter
>
> WITHOUT '\n' at the end.

Heh. I'm not sure how valid that is, but it's an interesting case for sure.

But it's actually fairly easy to fix with the franken-approach I did
that combines mine and Kees' patches.

Does this work?

                  Linus

View attachment "patch.diff" of type "text/x-patch" (1563 bytes)