** Description changed: + [Impact] + + * kdump doesn't work on non-efi systems + * a kernel dump can't be generated + + [Test Case] + + * install kdump-tools + * configure kdump-tools (/etc/default/kdump-tools) + * try to start kdump-tools service (kdump-config start) + * while executing kexec, you will get: + "efi memory descriptor version 0 is not supported!" + + [Regression Potential] + + * in theory it could brake kdump for efi systems + * in practice, its based on upstream regression fix (not included in Trusty) + * it has also been tested in 3 different setups and it worked + + [Other Info] + Based on upstream code commit explanation: """ - On non-EFI systems, efi_info section of boot_params is zero filled resulting + On non-EFI systems, efi_info section of boot_params is zero filled resulting in an erroneous message from kexec regarding "efi memory descriptor" version. - Caused by commit: e1ffc9e9a0769e1f54185003102e9bec428b84e8 "Passing efi related + Caused by commit: e1ffc9e9a0769e1f54185003102e9bec428b84e8 "Passing efi related data via setup_data" - # od -j 448 -N 32 -v -x /sys/kernel/boot_params/data + # od -j 448 -N 32 -v -x /sys/kernel/boot_params/data 0000700 0000 0000 0000 0000 0000 0000 0000 0000 0000720 0000 0000 0000 0000 0000 0000 0000 0000 0000740 # kexec -l --reuse-cmdline --initrd=/boot/initrd-`uname -r` /boot/vmlinuz-`uname -r` efi memory descriptor version 0 is not supported! """ It was brought to my attention to some of our users are facing this: ---- ## TRUSTY with kernel 4.4.0-83-generic # /usr/sbin/kdump-config load efi memory descriptor version 0 is not supported! * loaded kdump kernel /var/log/syslog: Jul 18 13:37:06 xxxx kdump-config: /sbin/kexec -p --command-line="BOOT_IMAGE=/boot/vmlinuz-4.4.0-83-generic root=UUID=xxxxxxxx-20e4-4325-ad92-7aef2af0beac ro KDUMP_CMDLINE_APPEND=irqpoll maxcpus=1 nousb irqpoll maxcpus=1 nousb" --initrd=/boot/initrd.img-4.4.0-83-generic /boot/vmlinuz-4.4.0-83-generic Jul 18 13:37:06 xxxx kdump-config: loaded kdump kernel ---- Despite the message of kdump being loaded, it doesn't look that it is operational. Dump files could be generated using Xenial kdump-tools, but not Trusty's.
** Tags removed: patch ** Tags added: sts-sponsor -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to kexec-tools in Ubuntu. https://bugs.launchpad.net/bugs/1705054 Title: Trusty kexec-tools suffer from upstream code regression. Fix not included. Status in kexec-tools package in Ubuntu: Confirmed Bug description: [Impact] * kdump doesn't work on non-efi systems * a kernel dump can't be generated [Test Case] * install kdump-tools * configure kdump-tools (/etc/default/kdump-tools) * try to start kdump-tools service (kdump-config start) * while executing kexec, you will get: "efi memory descriptor version 0 is not supported!" [Regression Potential] * in theory it could brake kdump for efi systems * in practice, its based on upstream regression fix (not included in Trusty) * it has also been tested in 3 different setups and it worked [Other Info] Based on upstream code commit explanation: """ On non-EFI systems, efi_info section of boot_params is zero filled resulting in an erroneous message from kexec regarding "efi memory descriptor" version. Caused by commit: e1ffc9e9a0769e1f54185003102e9bec428b84e8 "Passing efi related data via setup_data" # od -j 448 -N 32 -v -x /sys/kernel/boot_params/data 0000700 0000 0000 0000 0000 0000 0000 0000 0000 0000720 0000 0000 0000 0000 0000 0000 0000 0000 0000740 # kexec -l --reuse-cmdline --initrd=/boot/initrd-`uname -r` /boot/vmlinuz-`uname -r` efi memory descriptor version 0 is not supported! """ It was brought to my attention to some of our users are facing this: ---- ## TRUSTY with kernel 4.4.0-83-generic # /usr/sbin/kdump-config load efi memory descriptor version 0 is not supported! * loaded kdump kernel /var/log/syslog: Jul 18 13:37:06 xxxx kdump-config: /sbin/kexec -p --command-line="BOOT_IMAGE=/boot/vmlinuz-4.4.0-83-generic root=UUID=xxxxxxxx-20e4-4325-ad92-7aef2af0beac ro KDUMP_CMDLINE_APPEND=irqpoll maxcpus=1 nousb irqpoll maxcpus=1 nousb" --initrd=/boot/initrd.img-4.4.0-83-generic /boot/vmlinuz-4.4.0-83-generic Jul 18 13:37:06 xxxx kdump-config: loaded kdump kernel ---- Despite the message of kdump being loaded, it doesn't look that it is operational. Dump files could be generated using Xenial kdump-tools, but not Trusty's. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/kexec-tools/+bug/1705054/+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
