Hello Chengen, or anyone else affected, Accepted makedumpfile into lunar-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/makedumpfile/1:1.7.2-1ubuntu0.1 in a few hours, and then in the -proposed repository.
Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users. If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed- lunar to verification-done-lunar. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification- failed-lunar. In either case, without details of your testing we will not be able to proceed. Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping! N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days. ** Changed in: makedumpfile (Ubuntu Lunar) Status: In Progress => Fix Committed ** Tags added: verification-needed verification-needed-lunar ** Changed in: makedumpfile (Ubuntu Jammy) Status: In Progress => Fix Committed ** Tags added: verification-needed-jammy -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to makedumpfile in Ubuntu. https://bugs.launchpad.net/bugs/2038248 Title: Slab page exclusion issue on Linux 6.2-rc1 Status in makedumpfile package in Ubuntu: Fix Released Status in makedumpfile source package in Jammy: Fix Committed Status in makedumpfile source package in Lunar: Fix Committed Bug description: [Impact] The kernel crashdumps generated by makedumpfile on kernel 6.2 (affects Lunar, and Jammy with the HWE kernel) might not open on crash, due to kernel changes not reflected in makedumpfile. The Kernel commit 130d4df57390 ("mm/sl[au]b: rearrange struct slab fields to allow larger rcu_head"), included in Linux 6.2-rc1 and later versions, introduced a change that aligns the offset of slab.slabs with that of page.mapping. However, this modification unintentionally causes the makedumpfile command with the -d 8 option, meant to exclude user data, to incorrectly exclude certain slab pages. Consequently, when utilizing dumpfiles generated in this manner, the "crash" utility may encounter an error when attempting to initiate a session: crash: page excluded: kernel virtual address: ffff0000e269d428 type: "xa_node shift" [Fix] An upstream fix is available. ========== commit 5f17bdd2128998a3eeeb4521d136a192222fadb6 Author: Kazuhito Hagio <k-hagio...@nec.com> Date: Wed Dec 21 11:06:39 2022 +0900 [PATCH] Fix wrong exclusion of slab pages on Linux 6.2-rc1 ========== [Test Plan] 1. Install the required packages and then proceed to reboot the machine. # sudo apt install crash linux-crashdump -y # reboot 2. To check the status of kdump, use the `kdump-config show` command. # kdump-config show DUMP_MODE: kdump USE_KDUMP: 1 KDUMP_COREDIR: /var/crash crashkernel addr: 0x64000000 /var/lib/kdump/vmlinuz: symbolic link to /boot/vmlinuz-6.2.0-33-generic kdump initrd: /var/lib/kdump/initrd.img: symbolic link to /var/lib/kdump/initrd.img-6.2.0-33-generic current state: ready to kdump kexec command: /sbin/kexec -p --command-line="BOOT_IMAGE=/boot/vmlinuz-6.2.0-33-generic root=UUID=3e72f5d5-870b-4b8e-9a0d-8ba920391379 ro console=tty1 console=ttyS0 reset_devices systemd.unit=kdump-tools-dump.service nr_cpus=1 irqpoll usbcore.nousb" --initrd=/var/lib/kdump/initrd.img /var/lib/kdump/vmlinuz 3. To trigger a crash dump forcefully, execute the `echo c | sudo tee /proc/sysrq-trigger` command. 4. Download the kernel .ddeb file, which will be used for analyzing the dump file. # sudo -i # cd /var/crash # pull-lp-ddebs linux-image-unsigned-$(uname -r) # dpkg-deb -x linux-image-unsigned-$(uname -r)-*.ddeb dbgsym-$(uname -r) 5. Utilize the "crash" utility to parse and analyze the dump file. # crash dbgsym-$(uname -r)/usr/lib/debug/boot/vmlinux-$(uname -r) XXXX/dump.XXXX ... please wait... (gathering task table data) crash: page excluded: kernel virtual address: ffff0000e269d428 type: "xa_node shift" [Where problems could occur] The patch has altered the method for excluding slab pages, aligning with the structural changes introduced in Linux 6.2-rc1. This modification is essential for Linux kernel 6.2. However, it's crucial to note that this change may impact the content of the dump file, potentially leading to a situation where the "crash" utility is unable to parse it in the worst-case scenario. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/makedumpfile/+bug/2038248/+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
