linux-kernel - Bug in patch "x86/pti: Add the pti= cmdline option and documentation"

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Message-ID: <52b2f3c6-2e5e-2033-87d6-5abb3eb27b35@suse.com>
Date:   Fri, 22 Dec 2017 17:41:32 +0100
From:   Juergen Gross <jgross@...e.com>
To:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Borislav Petkov <bp@...e.de>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: Bug in patch "x86/pti: Add the pti= cmdline option and documentation"

The patch in the tip tree with commit 506bcdf68b07a0335751e1fe8be37
("x86/pti: Add the pti= cmdline option and documentation") is completely
wrong: cmdline_find_option() will return -1 in case the otion isn't
found and the len of the argument in case it has been found.

Juergen