I built a test kernel with commit cd8dd032f61abeb08d2c03bab4968a9de231a1be. This test kernel also had commit 3d8bba9535a applied first.
The test kernel can be downloaded from: http://kernel.ubuntu.com/~jsalisbury/lp1769027 Can you test this kernel and see if it resolves this bug? Note about installing test kernels: • If the test kernel is prior to 4.15(Bionic) you need to install the linux-image and linux-image-extra .deb packages. • If the test kernel is 4.15(Bionic) or newer, you need to install the linux-image-unsigned, linux-modules and linux-modules-extra .deb packages. Thanks in advance! -- 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/1769027 Title: perf record crash: refcount_inc assertion failed Status in linux package in Ubuntu: In Progress Status in linux source package in Artful: In Progress Bug description: On linux-hwe-tools-4.13.0-39 in xenial: Trying to run perf record ... --cgroup=mycgroup causes an immediate assertion failure: refcount_inc: Assertion `!(!refcount_inc_not_zero(r))' failed. Confirmed fixed by patching my linux-tools package with this upstream commit (on top of the commit in bug #1767204): https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux- stable.git/commit/tools/perf/util/cgroup.c?id=cd8dd032f61abeb08d2c03bab4968a9de231a1be To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1769027/+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
