This bug is awaiting verification that the kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed- trusty' to 'verification-done-trusty'.
If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you! ** Tags added: verification-needed-trusty ** Tags added: verification-needed-utopic -- 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/1388952 Title: CONFIG_IPMI_SI_PROBE_DEFAULTS should be disabled on ARM Status in “linux” package in Ubuntu: Fix Committed Status in “linux” source package in Trusty: Fix Committed Status in “linux” source package in Utopic: Fix Committed Status in “linux” source package in Vivid: Fix Committed Bug description: [Impact] Causes fault which can lead to a hang or crash on ARM systems when loading the ipmi_si module. The ipmi_si driver includes code that probes into iospace for a KCS interface. This is to support platforms that don't expose this interface in SMBIOS/ACPI tables, and this is a defined discovery mechanism as per the IPMI Spec (v2.0r1, section 9.5). However, this assumption is x86-centric. It is not safe to blindly probe I/O space on ARM platforms. [Test Case] sudo modprobe ipmi_si This should discover an IPMI system interface if present, or fail to load otherwise. But it should not cause a hang, a synchronous external abort, or other kernel failure. [Regression Risk] The proposed fix is only to the ARM config, so the risk to other architectures is negligible. There is a risk that there exists some system out there where this probing works - but I'm highly confident no such system exists. Existing ARM systems supported by Ubuntu either describe their IPMI/KCS interface using device-tree or do not provide one. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1388952/+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
