Segmentation fault

[turingking]

root@OpenWrt:~# uname -a
Linux OpenWrt 4.9.77 #0 SMP Thu Jan 25 12:45:48 2018 armv7l GNU/Linux
root@OpenWrt:~# zerotier-cli status
Segmentation fault
root@OpenWrt:~# opkg update
Downloading http://mirrors.ustc.edu.cn/lede/snapshots/targets/bcm53xx/generic/packages/Packages.gz
Updated list of available packages in /var/opkg-lists/reboot_core
Downloading http://mirrors.ustc.edu.cn/lede/snapshots/packages/arm_cortex-a9/base/Packages.gz
Updated list of available packages in /var/opkg-lists/reboot_base
Downloading http://mirrors.ustc.edu.cn/lede/snapshots/packages/arm_cortex-a9/luci/Packages.gz
Updated list of available packages in /var/opkg-lists/reboot_luci
Downloading http://mirrors.ustc.edu.cn/lede/snapshots/packages/arm_cortex-a9/packages/Packages.gz
Updated list of available packages in /var/opkg-lists/reboot_packages
Downloading http://mirrors.ustc.edu.cn/lede/snapshots/packages/arm_cortex-a9/routing/Packages.gz
Updated list of available packages in /var/opkg-lists/reboot_routing
Downloading http://mirrors.ustc.edu.cn/lede/snapshots/packages/arm_cortex-a9/telephony/Packages.gz
Updated list of available packages in /var/opkg-lists/reboot_telephony
root@OpenWrt:~# opkg remove zerotier
Removing package zerotier from root...
root@OpenWrt:~# opkg install zerotier
Installing zerotier (1.2.4-3) to root...
Downloading http://mirrors.ustc.edu.cn/lede/snapshots/packages/arm_cortex-a9/packages/zerotier_1.2.4-3_arm_cortex-a9.ipk
Configuring zerotier.
root@OpenWrt:~# /etc/init.d/zerotier start
root@OpenWrt:~# zerotier-cli status
Segmentation fault

[mwarning]

Hm, do you use LEDE 17.01.4? I haven't tested any older releases.
I don't have that platform (armv7l) available to reproduce the problem.

If you don't mind using a development build, you should use images from here https://downloads.openwrt.org/snapshots/targets/
Then do "opkg update" and "opkg install zerotier".

[miegl]

Getting the same exact error on latest snapshot build.

[miegl]

The older zerotier 1.1.14-4 package from 17.01.4 repo seems to be working fine.

[mwarning]

Can you reproduce the problem? If yes, how? What device is affected in your case?

[miegl]

root@gateway:~# opkg install zerotier
Installing zerotier (1.2.4-3) to root...
Downloading http://downloads.lede-project.org/snapshots/packages/arm_cortex-a15_neon-vfpv4/packages/zerotier_1.2.4-3_arm_cortex-a15_neon-vfpv4.ipk
Configuring zerotier.
root@gateway:~# nano /etc/config/zerotier
root@gateway:~# /etc/init.d/zerotier stop
root@gateway:~# /etc/init.d/zerotier start
sh: /var/lib/zerotier-one: unknown operand
Generate secret - please wait...
Segmentation fault
cat: can't open '/tmp/zt.sample_config.secret': No such file or directory
rm: can't remove '/tmp/zt.sample_config.secret': No such file or directory
root@gateway:~# /etc/init.d/zerotier start
sh: /var/lib/zerotier-one: unknown operand
root@gateway:~# zerotier-cli
Segmentation fault

The sh: /var/lib/zerotier-one: unknown operand error is probably caused by newer busybox.

My device is zyxel nbg6817.

[delandtj]

For the segfault, I haven't been able to track it down, as building it with debug makes the problem go away :-/ (Heisenberg)

But the segfault always happens on mvebu (LinkSys WRT 1900*,3200ACM) when ZT isn't built with debug info.

the unknown operand is due to :
https://github.com/openwrt/packages/blob/master/net/zerotier/files/zerotier.init#L31 , where config_path isn't set

add option config_path '/var/lib/zerotier' to have this error go away, didn't dig deeper than that

[mwarning]

ah, ok. The unknown operand error is easy to fix ("$config_path"). But I do not know about the segfault. My testing device is broken and I wait for the new shipment for a month now...

[mwarning]

@miegl please try https://mwarning.de/misc/zerotier_1.2.4-4_arm_cortex-a15_neon-vfpv4.ipk

[miegl]

Thu Apr 12 14:33:59 2018 daemon.notice procd: /etc/rc.d/S90zerotier: Generate secret - please wait...
Thu Apr 12 14:33:59 2018 daemon.notice procd: /etc/rc.d/S90zerotier: Segmentation fault
Thu Apr 12 14:33:59 2018 daemon.notice procd: /etc/rc.d/S90zerotier: cat: can't open '/tmp/zt.sample_config.secret': No such file or directory
Thu Apr 12 14:33:59 2018 daemon.notice procd: /etc/rc.d/S90zerotier: rm: can't remove '/tmp/zt.sample_config.secret': No such file or directory

[mwarning]

@miegl thanks, I can reproduce the error now. :-)

[delandtj]

@miegl how did you get that output from procd ?

[mwarning]

@miegl please try again: https://mwarning.de/misc/zerotier_1.2.4-4_arm_cortex-a15_neon-vfpv4.ipk

[delandtj]

@mwarning do you have a branch or commit ? did you find to fix the segfault ?

[mwarning]

@delandtj I hope to have fixed it in 2ef2c02 (remove -pie from linker options)
.. though, it is not a bugfix.

[miegl]

@mwarning wow it actually seems to work! Thank you 👍