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Open Source and information security mailing list archives
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Date: Tue, 16 Jan 2007 08:53:19 -0800 From: "H. Peter Anvin" <hpa@...or.com> To: "Eric W. Biederman" <ebiederm@...ssion.com> CC: Andrew Morton <akpm@...l.org>, linux-kernel@...r.kernel.org, Linux Containers <containers@...ts.osdl.org>, netdev@...r.kernel.org, xfs-masters@....sgi.com, xfs@....sgi.com, linux-scsi@...r.kernel.org, James.Bottomley@...elEye.com, minyard@....org, openipmi-developer@...ts.sourceforge.net, tony.luck@...el.com, linux-mips@...ux-mips.org, ralf@...ux-mips.org, schwidefsky@...ibm.com, heiko.carstens@...ibm.com, linux390@...ibm.com, linux-390@...marist.edu, paulus@...ba.org, linuxppc-dev@...abs.org, lethal@...ux-sh.org, linuxsh-shmedia-dev@...ts.sourceforge.net, ak@...e.de, vojtech@...e.cz, clemens@...isch.de, a.zummo@...ertech.it, rtc-linux@...glegroups.com, linux-parport@...ts.infradead.org, andrea@...e.de, tim@...erelk.net, philb@....org, aharkes@...cmu.edu, coda@...cmu.edu, codalist@...EMANN.coda.cs.cmu.edu, aia21@...tab.net, linux-ntfs-dev@...ts.sourceforge.net, mark.fasheh@...cle.com, kurt.hackel@...cle.com Subject: Re: [PATCH 0/59] Cleanup sysctl Eric W. Biederman wrote: > > - Removal of sys_sysctl support where people had used conflicting sysctl > numbers. Trying to break glibc or other applications by changing the > ABI is not cool. 9 instances of this in the kernel seems a little > extreme. > It would be highly advantageous if we could have a file that acts as a central registry of architectural sysctl numbers *and have the numbers in the kernel derived from there*. As I've said before, I don't really think sys_sysctl is any worse than ad hoc system calls (sys_mips and the like), but the real problem is that there are architectural and non-archtectural numbers, and they're mixed in all over the place. I think it would be fair to say that if they're not in <linux/sysctl.h> they're not architectural, but that doesn't resolve the counterpositive (are there sysctls in <linux/sysctl.h> which aren't architectural? From the looks of it, I would say yes.) Non-architectural sysctl numbers should not be exported to userspace, and should eventually be rejected by sys_sysctl. -hpa - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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