From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andre Przywara Date: Thu, 23 Apr 2009 19:32:51 +0000 Subject: [PATCH]: make /dev/cpu//cpuid world readable Message-Id: <49F0C263.6010102@amd.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-hotplug@vger.kernel.org Hi, as I don't see any security implications, to be actually useful /dev/cpu//cpuid should be world readable. The cpuid instruction can be called from userspace anyway, so there is nothing to hide. The device does not support any write operation, so 0444 should suffice. Please apply so that distributions can follow. Regards, Andre. Signed-off-by: Andre Przywara diff --git a/rules/rules.d/50-udev-default.rules b/rules/rules.d/50-udev-default.rules index 240cb3b..72e5b55 100644 --- a/rules/rules.d/50-udev-default.rules +++ b/rules/rules.d/50-udev-default.rules @@ -95,7 +95,7 @@ SUBSYSTEM="aoe", KERNEL="err", MODE="0440" KERNEL="tun", NAME="net/%k", MODE="0666" # CPU -KERNEL="cpu[0-9]*", NAME="cpu/%n/cpuid" +KERNEL="cpu[0-9]*", NAME="cpu/%n/cpuid", MODE="0444" KERNEL="msr[0-9]*", NAME="cpu/%n/msr" KERNEL="microcode", NAME="cpu/microcode", MODE="0600" -- Andre Przywara AMD-Operating System Research Center (OSRC), Dresden, Germany Tel: +49 351 488-3567-12 ----to satisfy European Law for business letters: Advanced Micro Devices GmbH Karl-Hammerschmidt-Str. 34, 85609 Dornach b. Muenchen Geschaeftsfuehrer: Jochen Polster; Thomas M. McCoy; Giuliano Meroni Sitz: Dornach, Gemeinde Aschheim, Landkreis Muenchen Registergericht Muenchen, HRB Nr. 43632