[Bug 1900107] [NEW] fwupd is eating 100% CPU for 30 minutes

[Marius Gedminas]

Public bug reported:

The fan of my laptop started going full-throttle and I ran htop to see
why.  I see a /usr/libexec/fwupd/fwupd eating 100% CPU for 29:55
minutes.

According to ps -o pid,lstart,etime,cmd the process was started
yesterday at 22:44.  The laptop was suspended yesterday at 23:15 and
woken up this morning at 09:03.  The time now is 11:26, so it doesn't
seem to be directly related to the suspend.

perf top attributes all the time to libptrhead-2.31.so, in
__pthread_rwlock_wrlock.

pstack is unable to extract a stack trace:

86826: /usr/libexec/fwupd/fwupd
(No symbols found)
crawl: Input/output error
Error tracing through process 86826
0x7f1c6e8cbe4a: ????

The journal has some interesting messages from fwupd this morning, but I
hope apport will attach them.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: fwupd 1.3.11-1~focal1
ProcVersionSignature: Ubuntu 5.4.0-51.56-generic 5.4.65
Uname: Linux 5.4.0-51-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu27.9
Architecture: amd64
CasperMD5CheckResult: skip
Date: Fri Oct 16 11:22:23 2020
ExecutablePath: /usr/libexec/fwupd/fwupd
InstallationDate: Installed on 2020-10-08 (7 days ago)
InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
SourcePackage: fwupd
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: fwupd (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug focal

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https://bugs.launchpad.net/bugs/1900107

Title:
  fwupd is eating 100% CPU for 30 minutes

Status in fwupd package in Ubuntu:
  New

Bug description:
  The fan of my laptop started going full-throttle and I ran htop to see
  why.  I see a /usr/libexec/fwupd/fwupd eating 100% CPU for 29:55
  minutes.

  According to ps -o pid,lstart,etime,cmd the process was started
  yesterday at 22:44.  The laptop was suspended yesterday at 23:15 and
  woken up this morning at 09:03.  The time now is 11:26, so it doesn't
  seem to be directly related to the suspend.

  perf top attributes all the time to libptrhead-2.31.so, in
  __pthread_rwlock_wrlock.

  pstack is unable to extract a stack trace:

  86826: /usr/libexec/fwupd/fwupd
  (No symbols found)
  crawl: Input/output error
  Error tracing through process 86826
  0x7f1c6e8cbe4a: ????

  The journal has some interesting messages from fwupd this morning, but
  I hope apport will attach them.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: fwupd 1.3.11-1~focal1
  ProcVersionSignature: Ubuntu 5.4.0-51.56-generic 5.4.65
  Uname: Linux 5.4.0-51-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.11-0ubuntu27.9
  Architecture: amd64
  CasperMD5CheckResult: skip
  Date: Fri Oct 16 11:22:23 2020
  ExecutablePath: /usr/libexec/fwupd/fwupd
  InstallationDate: Installed on 2020-10-08 (7 days ago)
  InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
  SourcePackage: fwupd
  UpgradeStatus: No upgrade log present (probably fresh install)

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