linux-kernel - [PATCH v2 0/2] fix parsing of reboot= cmdline

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Message-Id: <20201027133545.58625-1-mcroce@linux.microsoft.com>
Date:   Tue, 27 Oct 2020 14:35:43 +0100
From:   Matteo Croce <mcroce@...ux.microsoft.com>
To:     linux-kernel@...r.kernel.org
Cc:     Guenter Roeck <linux@...ck-us.net>, Petr Mladek <pmladek@...e.com>,
        Arnd Bergmann <arnd@...db.de>, Mike Rapoport <rppt@...nel.org>,
        Kees Cook <keescook@...omium.org>,
        Pavel Tatashin <pasha.tatashin@...een.com>,
        Robin Holt <robinmholt@...il.com>,
        Fabian Frederick <fabf@...net.be>, stable@...r.kernel.org
Subject: [PATCH v2 0/2] fix parsing of reboot= cmdline

From: Matteo Croce <mcroce@...rosoft.com>

The parsing of the reboot= cmdline has two major errors:
- a missing bound check can crash the system on reboot
- parsing of the cpu number only works if specified last

Fix both, along with a small code refactor.

v1->v2:
As Petr suggested, don't force base 10 in simple_strtoul(),
so hex values are accepted as well.

Matteo Croce (2):
  reboot: fix overflow parsing reboot cpu number
  reboot: fix parsing of reboot cpu number

 kernel/reboot.c | 24 +++++++++++++-----------
 1 file changed, 13 insertions(+), 11 deletions(-)

-- 
2.28.0