Bug#898930: [pkg-gnupg-maint] Bug#898930: gnupg: uses 100% CPU until killed

[Daniel Kahn Gillmor]

On Thu 2018-05-17 16:07:16 +0200, Johannes Rohr wrote:
> Lately, when I leave my computer running, when I return I occasionally
> find that CPU usage is at 100%, CPU temperature is close to 100
> centigrades, and that's because a gpg process seems to run wild.
>
> This is what I get when I run strace on the process:
>
> fcntl(7, F_SETLK, {l_type=F_RDLCK, l_whence=SEEK_SET, l_start=1073741824, 
> l_len=1}) = -1 EACCES (Permission denied)
> fcntl(7, F_SETLK, {l_type=F_RDLCK, l_whence=SEEK_SET, l_start=1073741824, 
> l_len=1}) = -1 EACCES (Permission denied)
> fcntl(7, F_SETLK, {l_type=F_RDLCK, l_whence=SEEK_SET, l_start=1073741824, 
> l_len=1}) = -1 EACCES (Permission denied)
> fcntl(7, F_SETLK, {l_type=F_RDLCK, l_whence=SEEK_SET, l_start=1073741824, 
> l_len=1}) = -1 EACCES (Permission denied)
> fcntl(7, F_SETLK, {l_type=F_RDLCK, l_whence=SEEK_SET, l_start=1073741824, 
> l_len=1}) = -1 EACCES (Permission denied)
> fcntl(7, F_SETLK, {l_type=F_RDLCK, l_whence=SEEK_SET, l_start=1073741824, 
> l_len=1}) = -1 EACCES (Permission denied)
>
>
> Or with strace -y
>
> fcntl(7, F_SETLK, {l_type=F_RDLCK, 
> l_whence=SEEK_SET, l_start=1073741824, l_len=1}) = -1 EACCES (Permission 
> denied)
> fcntl(7, F_SETLK, {l_type=F_RDLCK, 
> l_whence=SEEK_SET, l_start=1073741824, l_len=1}) = -1 EACCES (Permission 
> denied)
> fcntl(7, F_SETLK, {l_type=F_RDLCK, 
> l_whence=SEEK_SET, l_start=1073741824, l_len=1}) = -1 EACCES (Permission 
> denied)
> fcntl(7, F_SETLK, {l_type=F_RDLCK, 
> l_whence=SEEK_SET, l_start=1073741824, l_len=1}) = -1 EACCES (Permission 
> denied)
> fcntl(7, F_SETLK, {l_type=F_RDLCK, 
> l_whence=SEEK_SET, l_start=1073741824, l_len=1}) = -1 EACCES (Permission 
> denied)
> fcntl(7, F_SETLK, {l_type=F_RDLCK, 
> l_whence=SEEK_SET, l_start=1073741824, l_len=1}) = -1 EACCES (Permission 
> denied)
> fcntl(7, F_SETLK, {l_type=F_RDLCK, 
> l_whence=SEEK_SET, l_start=1073741824, l_len=1}) = -1 EACCES (Permission 
> denied)
> fcntl(7, F_SETLK, {l_type=F_RDLCK, 
> l_whence=SEEK_SET, l_start=1073741824, l_len=1}^Cstrace: Process 28176 
> detached
>
> I have no idea why permission is denied. I can't find that tofu.db is opened 
> by any other process, with lsof, also I can't find anything with lslocks.

what process specifically is doing this to the tofu database?  can you
identify the name of the process, what its arguments are, and how it was
invoked?

also, can you share any relevant parts of your ~/.gnupg/gpg.conf ?

  --dkg


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Bug#898930: gnupg: uses 100% CPU until killed

[Johannes Rohr]

Package: gnupg
Version: 2.2.5-1
Severity: important

Lately, when I leave my computer running, when I return I occasionally find 
that CPU usage is at 100%, CPU temperature is close to 100 centigrades, and 
that's because a gpg process seems to run wild.

This is what I get when I run strace on the process:

fcntl(7, F_SETLK, {l_type=F_RDLCK, l_whence=SEEK_SET, l_start=1073741824, 
l_len=1}) = -1 EACCES (Permission denied)
fcntl(7, F_SETLK, {l_type=F_RDLCK, l_whence=SEEK_SET, l_start=1073741824, 
l_len=1}) = -1 EACCES (Permission denied)
fcntl(7, F_SETLK, {l_type=F_RDLCK, l_whence=SEEK_SET, l_start=1073741824, 
l_len=1}) = -1 EACCES (Permission denied)
fcntl(7, F_SETLK, {l_type=F_RDLCK, l_whence=SEEK_SET, l_start=1073741824, 
l_len=1}) = -1 EACCES (Permission denied)
fcntl(7, F_SETLK, {l_type=F_RDLCK, l_whence=SEEK_SET, l_start=1073741824, 
l_len=1}) = -1 EACCES (Permission denied)
fcntl(7, F_SETLK, {l_type=F_RDLCK, l_whence=SEEK_SET, l_start=1073741824, 
l_len=1}) = -1 EACCES (Permission denied)


Or with strace -y

fcntl(7, F_SETLK, {l_type=F_RDLCK, l_whence=SEEK_SET, 
l_start=1073741824, l_len=1}) = -1 EACCES (Permission denied)
fcntl(7, F_SETLK, {l_type=F_RDLCK, l_whence=SEEK_SET, 
l_start=1073741824, l_len=1}) = -1 EACCES (Permission denied)
fcntl(7, F_SETLK, {l_type=F_RDLCK, l_whence=SEEK_SET, 
l_start=1073741824, l_len=1}) = -1 EACCES (Permission denied)
fcntl(7, F_SETLK, {l_type=F_RDLCK, l_whence=SEEK_SET, 
l_start=1073741824, l_len=1}) = -1 EACCES (Permission denied)
fcntl(7, F_SETLK, {l_type=F_RDLCK, l_whence=SEEK_SET, 
l_start=1073741824, l_len=1}) = -1 EACCES (Permission denied)
fcntl(7, F_SETLK, {l_type=F_RDLCK, l_whence=SEEK_SET, 
l_start=1073741824, l_len=1}) = -1 EACCES (Permission denied)
fcntl(7, F_SETLK, {l_type=F_RDLCK, l_whence=SEEK_SET, 
l_start=1073741824, l_len=1}) = -1 EACCES (Permission denied)
fcntl(7, F_SETLK, {l_type=F_RDLCK, l_whence=SEEK_SET, 
l_start=1073741824, l_len=1}^Cstrace: Process 28176 detached

I have no idea why permission is denied. I can't find that tofu.db is opened by 
any other process, with lsof, also I can't find anything with lslocks.


-- System Information:
Debian Release: buster/sid
  APT prefers testing
  APT policy: (990, 'testing'), (500, 'unstable-debug'), (500, 
'testing-debug'), (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.16.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8), 
LANGUAGE=de_DE.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages gnupg depends on:
ii  dirmngr 2.2.5-1
ii  gnupg-l10n  2.2.5-1
ii  gnupg-utils 2.2.5-1
ii  gpg 2.2.5-1
ii  gpg-agent   2.2.5-1
ii  gpg-wks-client  2.2.5-1
ii  gpg-wks-server  2.2.5-1
ii  gpgsm   2.2.5-1
ii  gpgv2.2.5-1

gnupg recommends no packages.

Versions of packages gnupg suggests:
pn  parcimonie  
pn  xloadimage  

-- no debconf information