This bug is a feature request, and therefore requires no apport traces. Furthermore, it also includes a link to a patch. What's being asked here is to apply that patch, no extra information should be needed.
** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed ** Description changed: To enable kexec makes sense for a generic distro kernel. But if your - users have root and you want to make it hard for them to run code in - ring 0, you commonly disable further module loading and you also want to - disable kexec[1]. Kees Cook wrote up a patch[2] that we'd like to see - applied to the Ubuntu kernel to avoid recompilation of the distro - kernel. + users have root in their virtual machines, and you want to make it hard + for them to run code in ring 0, you commonly disable further module + loading and you also want to disable kexec[1]. Kees Cook wrote up a + patch[2] that we'd like to see applied to the Ubuntu kernel to avoid + recompilation of the distro kernel. I'm marking this as a security issue on the ground that it's quite surprising that setting kernel.modules_disabled=1 as a hardening feature can be subverted by using kexec. [1] http://mjg59.dreamwidth.org/28746.html [2] https://lkml.org/lkml/2013/12/9/765 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1259570 Title: kexec should get a disabling sysctl Status in “linux” package in Ubuntu: Confirmed Bug description: To enable kexec makes sense for a generic distro kernel. But if your users have root in their virtual machines, and you want to make it hard for them to run code in ring 0, you commonly disable further module loading and you also want to disable kexec[1]. Kees Cook wrote up a patch[2] that we'd like to see applied to the Ubuntu kernel to avoid recompilation of the distro kernel. I'm marking this as a security issue on the ground that it's quite surprising that setting kernel.modules_disabled=1 as a hardening feature can be subverted by using kexec. [1] http://mjg59.dreamwidth.org/28746.html [2] https://lkml.org/lkml/2013/12/9/765 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1259570/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp