<div dir="ltr"><div>Hi,</div>I am trying to run systemd-udevd.service through valgrind for debugging some memory corruption issue. <div> OS info : 64 bit Ubuntu OS. This is run as guest vm. RAM memory /swap size : 4GB RAM and 3 GB SWAP space. systemd version : systemd v237. The command uname -a gives below result. Linux [xxx] 4.14.147-yocto-standard #1 SMP PREEMPT Thu Jan 30 18:52:38 UTC 2020 x86_64 GNU/Linux note : [xxx] is masked text. Referred to link <a href="https://lists.freedesktop.org/archives/systemd-devel/2015-April/030086.html">https://lists.freedesktop.org/archives/systemd-devel/2015-April/030086.html</a>. Followed below steps to run systemd-udev.service through valgrind. step 1 : On terminal, command "systemctl edit --full systemd-udev.service" Prefixed it's ExecStart= parameter with an invocation of valgrind as below, ExecStart=/usr/bin/valgrind --tool=memcheck /lib/systemd/systemd-udevd Step 2 : On terminal, command "systemctl daemon-reload" Step 3 : On terminal, command "systemctl restart systemd-udevd" Step 4 : On terminal, command ps command gave below result for udevd. [[0;1;32m●[[0m systemd-udevd.service - udev Kernel Device Manager Loaded: loaded (/etc/systemd/system/systemd-udevd.service; enabled; vendor preset: enabled) Active: [[0;1;32mactive (running)[[0m since Fri 2020-04-03 14:40:41 UTC; 9s ago Docs: man:systemd-udevd.service(8) man:udev(7) Main PID: 13179 (memcheck-amd64-) Status: "Processing with 16 children at max" Memory: 42.6M CGroup: /system.slice/systemd-udevd.service └─13179 /usr/bin/valgrind --tool=memcheck /lib/systemd/systemd-udevd Step 5 : Could see few lines of valgrind output with "systemctl status systemd-udev.service" command Apr 03 14:40:41 [xxx] valgrind[13179]: ==13179== by 0x4012BD1: ??? (in /lib/<a href="http://ld-2.27.so">ld-2.27.so</a>) Apr 03 14:40:41 [xxx] valgrind[13179]: ==13179== by 0x5BFCC8B: _dl_catch_exception (in /lib/<a href="http://libc-2.27.so">libc-2.27.so</a>) Apr 03 14:40:41 [xxx] valgrind[13179]: ==13179== by 0x4012789: ??? (in /lib/<a href="http://ld-2.27.so">ld-2.27.so</a>) Apr 03 14:40:41 [xxx] valgrind[13179]: ==13179== by 0x5BFC2DC: ??? (in /lib/<a href="http://libc-2.27.so">libc-2.27.so</a>) Apr 03 14:40:41 [xxx] valgrind[13179]: ==13179== by 0x5BFCC8B: _dl_catch_exception (in /lib/<a href="http://libc-2.27.so">libc-2.27.so</a>) Apr 03 14:40:41 [xxx] valgrind[13179]: ==13179== by 0x5BFCCFE: _dl_catch_error (in /lib/<a href="http://libc-2.27.so">libc-2.27.so</a>) Apr 03 14:40:41 [xxx] valgrind[13179]: ==13179== by 0x5BFC3A6: ??? (in /lib/<a href="http://libc-2.27.so">libc-2.27.so</a>) Apr 03 14:40:41 [xxx] valgrind[13179]: ==13179== by 0x5BFC436: __libc_dlopen_mode (in /lib/<a href="http://libc-2.27.so">libc-2.27.so</a>) Apr 03 14:40:41 [xxx] valgrind[13179]: ==13179== Address 0x650b1c0 is 16 bytes after a block of size 32 in arena "client" Apr 03 14:40:41 [xxx] valgrind[13179]: ==13179== Note : [xxx] is masked text. However, guest vm (Ubuntu OS) shut down within 2 minutes of restarting systemd-udevd service. Attempt to reboot the guest vm ( Ubuntu OS) failed. Can you please guide/suggest how to prevent the Ubuntu OS from shutting down after restarting systemd-udevd.service with valgrind. </div><div>Thanks, </div><div>Amit </div></div>