Public bug reported: I have systems that are regularly hitting a WARN in trace_event_dyn_put_ref.
The exact message is: WARNING: CPU: 1 PID: 30309 at kernel/trace/trace_dynevent.c:46 +trace_event_dyn_put_ref+0x15/0x20 With the following stacktrace: perf_trace_init+0x8f/0xd0 perf_tp_event_init+0x1f/0x40 perf_try_init_event+0x4a/0x130 perf_event_alloc+0x497/0xf40 __do_sys_perf_event_open+0x1d4/0xf70 __x64_sys_perf_event_open+0x20/0x30 do_syscall_64+0x5c/0xc0 entry_SYSCALL_64_after_hwframe+0x44/0xae I've debugged this and worked with upstream to get a fix into Linux. It was recently merged in 6.0-rc2. See here: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?h=v6.0-rc2&id=7249921d94ff64f67b733eca0b68853a62032b3d The problem started appearing as soon as our systems picked up the linux-aws-5.15 branch for Focal. (That was 5.15.0-1015-aws, if memory serves). Could you please cherry pick this fix and pull it back to the the linux and linux-aws kernels for Focal? There's test here: https://lore.kernel.org/all/cover.1660347763.git.k...@templeofstupid.com/ that reproduces the problem very reliably for me. With the patch applied, I no longer get the WARNs. ** Affects: linux (Ubuntu) Importance: Undecided Status: New -- 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/1987232 Title: WARN in trace_event_dyn_put_ref Status in linux package in Ubuntu: New Bug description: I have systems that are regularly hitting a WARN in trace_event_dyn_put_ref. The exact message is: WARNING: CPU: 1 PID: 30309 at kernel/trace/trace_dynevent.c:46 +trace_event_dyn_put_ref+0x15/0x20 With the following stacktrace: perf_trace_init+0x8f/0xd0 perf_tp_event_init+0x1f/0x40 perf_try_init_event+0x4a/0x130 perf_event_alloc+0x497/0xf40 __do_sys_perf_event_open+0x1d4/0xf70 __x64_sys_perf_event_open+0x20/0x30 do_syscall_64+0x5c/0xc0 entry_SYSCALL_64_after_hwframe+0x44/0xae I've debugged this and worked with upstream to get a fix into Linux. It was recently merged in 6.0-rc2. See here: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?h=v6.0-rc2&id=7249921d94ff64f67b733eca0b68853a62032b3d The problem started appearing as soon as our systems picked up the linux-aws-5.15 branch for Focal. (That was 5.15.0-1015-aws, if memory serves). Could you please cherry pick this fix and pull it back to the the linux and linux-aws kernels for Focal? There's test here: https://lore.kernel.org/all/cover.1660347763.git.k...@templeofstupid.com/ that reproduces the problem very reliably for me. With the patch applied, I no longer get the WARNs. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1987232/+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
