apport information
** Attachment added: "acpidump.txt"
https://bugs.launchpad.net/bugs/1987232/+attachment/5610815/+files/acpidump.txt
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/1987232
Title:
WARN in trace_event_dyn_put_ref
Status in linux package in Ubuntu:
Confirmed
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/[email protected]/ that
reproduces the problem very reliably for me. With the patch applied, I no
longer get the WARNs.
---
ProblemType: Bug
AlsaDevices:
total 0
crw-rw---- 1 root audio 116, 1 Aug 22 17:32 seq
crw-rw---- 1 root audio 116, 33 Aug 22 17:32 timer
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.20.11-0ubuntu27.24
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq',
'/dev/snd/timer'] failed with exit code 1:
CRDA: N/A
CasperMD5CheckResult: skip
DistroRelease: Ubuntu 20.04
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
Lsusb: Error: command ['lsusb'] failed with exit code 1:
Lsusb-t:
Lsusb-v: Error: command ['lsusb', '-v'] failed with exit code 1:
MachineType: Amazon EC2 c5d.12xlarge
Package: linux (not installed)
PciMultimedia:
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
LANG=C.UTF-8
SHELL=/bin/bash
ProcFB:
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.15.0-1015-aws
root=PARTUUID=4986e35b-1bd5-45d3-b528-fa2edb861a38 ro console=tty1
console=ttyS0 nvme_core.io_timeout=4294967295 panic=-1
ProcVersionSignature: Ubuntu 5.15.0-1015.19~20.04.1-aws 5.15.39
RelatedPackageVersions:
linux-restricted-modules-5.15.0-1015-aws N/A
linux-backports-modules-5.15.0-1015-aws N/A
linux-firmware N/A
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
Tags: focal uec-images
Uname: Linux 5.15.0-1015-aws x86_64
UnreportableReason: This report is about a package that is not installed.
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: N/A
_MarkForUpload: False
dmi.bios.date: 10/16/2017
dmi.bios.release: 1.0
dmi.bios.vendor: Amazon EC2
dmi.bios.version: 1.0
dmi.board.asset.tag: i-03f5d8581c7ad94aa
dmi.board.vendor: Amazon EC2
dmi.chassis.asset.tag: Amazon EC2
dmi.chassis.type: 1
dmi.chassis.vendor: Amazon EC2
dmi.modalias:
dmi:bvnAmazonEC2:bvr1.0:bd10/16/2017:br1.0:svnAmazonEC2:pnc5d.12xlarge:pvr:rvnAmazonEC2:rn:rvr:cvnAmazonEC2:ct1:cvr:sku:
dmi.product.name: c5d.12xlarge
dmi.sys.vendor: Amazon EC2
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