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Date: Wed, 21 Nov 2007 18:03:38 +0000 From: Pavel Machek <pavel@....cz> To: Daniel Reichelt <mail@...mservices.de> Cc: linux-kernel@...r.kernel.org Subject: Re: Patch: Hide process info from other users/users not in my group Hi! > this patch sets (if the corresponding kconfig option is active) the access > modes of /proc/<pid>-dirs to 550 instead of 555 in order to provide some > privacy to users. Tools like lsof and ps to spy out on other users become > ineffective. > > Cheers, > -- > Daniel Reichelt > > # diff -Naur linux-2.6.23.8/fs/Kconfig linux-2.6.23.8-dhr/fs/Kconfig > --- linux-2.6.23.8/fs/Kconfig 2007-11-16 19:14:27.000000000 +0100 > +++ linux-2.6.23.8-dhr/fs/Kconfig 2007-11-20 11:33:18.000000000 +0100 > @@ -918,6 +918,17 @@ > help > Exports the dump image of crashed kernel in ELF format. > > +config PROC_SECURED_PID_DIRS > + bool "chmod /proc/<pid>-dirs to 550" > + depends on PROC_FS > + default n > + help > + chmod /proc/<pid>-dirs to 550 instead of 555 which provides a bit > + moreprivacy to users on your system as only the user's and the user's > + group's process details may be viewed. Other users' tasks running on > + the system will be completely hidden from the means of utilities like > + ps or lsof. > + This really needs to be runtime-configurable. -- (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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