This bug is awaiting verification that the kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed- focal' to 'verification-done-focal'. If the problem still exists, change the tag 'verification-needed-focal' to 'verification-failed-focal'.
If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you! ** Tags added: verification-needed-focal -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-oem-5.6 in Ubuntu. https://bugs.launchpad.net/bugs/1886860 Title: cgroup refcount is bogus when cgroup_sk_alloc is disabled Status in linux package in Ubuntu: Invalid Status in linux-oem-5.6 package in Ubuntu: New Status in linux source package in Bionic: In Progress Status in linux-oem-5.6 source package in Bionic: Invalid Status in linux source package in Eoan: In Progress Status in linux-oem-5.6 source package in Eoan: Invalid Status in linux source package in Focal: In Progress Status in linux-oem-5.6 source package in Focal: Fix Committed Status in linux source package in Groovy: Invalid Status in linux-oem-5.6 source package in Groovy: New Bug description: [Impact] When net_prio and net_cls cgroups are used, cgroup refcount is bogus, as it's not incremented anymore, but decremented when sockets are closed. This might lead to crashes possibly because of use-after-free when packets are received as shown in LP #1886668. [Test case] Ran reproducer from comment #2. [Regression potential] We could break the use of cgroup bpf. The use of cgroup bpf looks to still be working from the reproducer. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1886860/+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
