Validated. Reported against FW 1.5. Validated against FW 2.0
Test: sudo apt-get install kexec-tools sudo kexec -l -d /boot/vmlinuz-<version> --initrd=/boot/initrd.img-<version> --reuse-cmd sudo kexec -e wait up to 10 minutes for the new kernel to boot System will crash at userspace boot without this fix. -- 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/1716483 Title: [SRU][Zesty] Fix lscpu segfault on ARM64 with SMBIOS v2.0 Status in linux package in Ubuntu: Incomplete Bug description: [Impact] On ARM64 systems with smbios v2.0, lscpu segfaults. This is caused by the fact that lspci issues a read() on /dev/mem at the offset where it expects to find the SMBIOS structure array. However, this region is classified as EFI_RUNTIME_SERVICE_DATA (as per the UEFI spec), and so it is omitted from the linear mapping. [Test] The issue was observed with kexec/kdump usecases when a FPDT ACPI table is presented to HLOS from the firmware. [Fix] Fixed upstream: 1151f838cb62 arm64: kernel: restrict /dev/mem read() calls to linear region [Regression Potential] The patch is confined to ARM64 arch, and applies only to systems with SMBIOS v2.0. Risk is low. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1716483/+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
