[Bug 1811162] Re: Turn on CONFIG_REFCOUNT_FULL for non-x86 arches

The task "linux (Ubuntu)" has expired because it has had no new comments or updates for more than three years. If this issue is still present in an Ubuntu LTS kernel still under active support, please reopen the bug and provide updated details. If this issue was reported against an Ubuntu kernel no longer under active support but the issue still exists in a currently supported Ubuntu kernel, please open a new bug against that kernel version and provide the updated details, with a reference link to the original bug. This action was performed by an automated process maintained by the Ubuntu Kernel Team. ** Tags added: kernel-autoclosed kernel-autoclosed-expired ** Changed in: linux (Ubuntu) Status: Triaged => Expired -- You received this bug notification because you are subscribed to linux in Ubuntu. Matching subscriptions: Bgg, Bmail, Nb https://bugs.launchpad.net/bugs/1811162 Title: Turn on CONFIG_REFCOUNT_FULL for non-x86 arches Status in linux package in Ubuntu: Expired Bug description: The upstream kernel has added refcount protection, in two ways. For arches that have provided a fast refcount_t implementation, they get it automatically (this is signaled by ARCH_HAS_REFCOUNT, which as of 4.20 kernels, is only the x86 arch). For other arches, they can get refcount protection via the CONFIG_REFCOUNT_FULL configure option. The upstream arm64 and arm maintainers have enabled this configuration by default for those arches, which has been carried into the ubuntu kernel config. We should enable that for our other arches that do not provide ARCH_HAS_REFCOUNT, namely ppc64el and s390x, to gain protection parity with the rest of the architectures supported by ubuntu kernels. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1811162/+subscriptions