Public bug reported:
STEPS.
1. Create a ControlPath socket with something like "-o
ControlPath=/tmp/sshcontrol-%C" during an SSH connection.
2. Check with ls the socket is there. I am getting
srw------- 1 enzo enzo 0 2016-06-17 10:17:21 sshcontrol-
369d1187d3900c559f063f947218528001d0e705
3. Ask lsof who's that socket belonging to:
lsof /tmp/sshcontrol-369d1187d3900c559f063f947218528001d0e705
4. Ask lsof the same but with grep
lsof | grep /tmp/sshcontrol-369d1187d3900c559f063f947218528001d0e705
ACTUAL RESULTS.
For step no. 3 I am getting nothing (but the WARNING about
/sys/kernel/debug/tracing)
For step no. 4 I am getting:
[enzo@Feynman ~] lsof | grep
/tmp/sshcontrol-369d1187d3900c559f063f947218528001d0e705
lsof: WARNING: can't stat() tracefs file system /sys/kernel/debug/tracing
Output information may be incomplete.
ssh 10667 enzo 4u unix 0x0000000000000000 0t0
173813
/tmp/sshcontrol-369d1187d3900c559f063f947218528001d0e705.NDScoG3mgs0mWc4q
type=STREAM
Where you can see clearly that the socket name has a trailing part
".NDScoG3mgs0mWc4q".
EXTRA STEP.
5. Ask lsof about the socket with the extended name
EXTRA RESULT
[enzo@Feynman ~] lsof
/tmp/sshcontrol-369d1187d3900c559f063f947218528001d0e705.NDScoG3mgs0mWc4q
lsof: WARNING: can't stat() tracefs file system /sys/kernel/debug/tracing
Output information may be incomplete.
lsof: status error on
/tmp/sshcontrol-369d1187d3900c559f063f947218528001d0e705.NDScoG3mgs0mWc4q: No
such file or directory
lsof 4.89
latest revision: ftp://lsof.itap.purdue.edu/pub/tools/unix/lsof/
latest FAQ: ftp://lsof.itap.purdue.edu/pub/tools/unix/lsof/FAQ
latest man page: ftp://lsof.itap.purdue.edu/pub/tools/unix/lsof/lsof_man
usage: [-?abhKlnNoOPRtUvVX] [+|-c c] [+|-d s] [+D D] [+|-E] [+|-e s] [+|-f[gG]]
[-F [f]] [-g [s]] [-i [i]] [+|-L [l]] [+m [m]] [+|-M] [-o [o]] [-p s]
[+|-r [t]] [-s [p:s]] [-S [t]] [-T [t]] [-u s] [+|-w] [-x [fl]] [--] [names]
Use the ``-h'' option to get more help information.
EXPECTED RESULT
A reasonable output from lsof detailing the real and actual unix socket.
SOURCES
man 5 ssh_config at the section "ControlPath"
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: openssh-client 1:7.2p2-4ubuntu1
Uname: Linux 4.4.13-040413-lowlatency x86_64
NonfreeKernelModules: rfcomm ipt_REJECT nf_reject_ipv4 pci_stub vboxpci
vboxnetadp vboxnetflt vboxdrv bnep btusb btrtl btbcm btintel xt_multiport
iptable_filter ip_tables x_tables 8812au ath3k cfg80211 bluetooth uas
usb_storage input_leds hp_wmi sparse_keymap snd_hda_codec_realtek
snd_hda_codec_generic intel_rapl x86_pkg_temp_thermal intel_powerclamp
snd_hda_intel coretemp snd_hda_codec kvm_intel snd_hda_core kvm snd_hwdep
snd_pcm irqbypass crct10dif_pclmul crc32_pclmul aesni_intel snd_seq_midi
aes_x86_64 snd_seq_midi_event lrw snd_rawmidi gf128mul glue_helper ablk_helper
cryptd snd_seq snd_seq_device serio_raw snd_timer mei_me snd mei soundcore
shpchp lpc_ich 8250_fintek mac_hid parport_pc ppdev lp parport autofs4 xfs
raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor
raid6_pq libcrc32c raid1 multipath linear hid_generic usbhid hid raid0 i915
i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt psmouse ahci
fb_sys_fops libahci drm r8169 mii wmi fj
es video
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CurrentDesktop: KDE
Date: Fri Jun 17 11:49:04 2016
InstallationDate: Installed on 2016-04-22 (55 days ago)
InstallationMedia: Kubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
RelatedPackageVersions:
ssh-askpass N/A
libpam-ssh N/A
keychain N/A
ssh-askpass-gnome N/A
SSHClientVersion: OpenSSH_7.2p2 Ubuntu-4ubuntu1, OpenSSL 1.0.2g-fips 1 Mar 2016
SourcePackage: openssh
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: openssh (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug third-party-packages xenial
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https://bugs.launchpad.net/bugs/1593657
Title:
ControlPath unix socket is created in a weird way
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