Can confirm this bug on a Micro-Star International Co., Ltd. GE63 7RD with 4.15.0-151.
ProblemType: KernelOops Annotation: Your system might become unstable now and might need to be restarted. Date: Mon Aug 2 20:22:08 2021 Failure: oops OopsText: BUG: Bad rss-counter state mm:00000000e1ad1a66 idx:3 val:1 BUG: Bad page cache in process TaskCon~read #2 pfn:1f8793 page:ffffdb5587e1e4c0 count:3 mapcount:1 mapping:ffff94a44c32bcf8 index:0xf3 flags: 0x17ffffc004002d(locked|referenced|uptodate|lru|swapbacked) raw: 0017ffffc004002d ffff94a44c32bcf8 00000000000000f3 0000000300000000 raw: ffffdb5587236fe0 ffffdb5585070820 0000000000000000 ffff94a6ae146000 page dumped because: still mapped when deleted page->mem_cgroup:ffff94a6ae146000 CPU: 4 PID: 14576 Comm: TaskCon~read #2 Tainted: G B OE 4.15.0-151-generic #157-Ubuntu Hardware name: Micro-Star International Co., Ltd. GE63 7RD/MS-16P3, BIOS E16P3IMS.10A 09/05/2018 Call Trace: Package: linux-image-4.15.0-151-generic 4.15.0-151.157 SourcePackage: linux Tags: kernel-oops Uname: Linux 4.15.0-151-generic x86_64 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1938013 Title: 4.15.0-151 is freezing various CPUs To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1938013/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs