[FS#1526] rpcd: memory leak in the current package version

[LEDE Bugs]

A new Flyspray task has been opened.  Details are below. 

User who did this - Yuubari (Yuubari) 

Attached to Project - OpenWrt/LEDE Project
Summary - rpcd: memory leak in the current package version
Task Type - Bug Report
Category - Base system
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - High
Priority - Very Low
Reported Version - Trunk
Due in Version - Undecided
Due Date - Undecided
Details -  - Device problem occurs on

Netgear WNDR3800.

 - Software versions of OpenWrt/LEDE release, packages, etc.

OpenWrt SNAPSHOT r6775-afdca53 / LuCI Master (git-18.118.21533-00d2429)
rpcd - 2018-04-20-66a9bad1-1 (https://git.openwrt.org/?p=project/rpcd.git;a=commit;h=66a9bad1a73bc33c4c5a9a00de8dc8ad35bdfaf1) — after the supposed memory leak fix.

 - Steps to reproduce

Leaving the router running normally is enough.

After about 3 days rpcd was consuming 40% of RAM and the OOM killer was wreaking mayhem in the system. Restarting rpcd solved the issue for now, but it already went from 0.7 to 4.2% memory usage. Accessing a luci page increases its RES by 4 KB every time. It looks like JS-based access (like leaving the interface overview page open) also produces these increases.

More information can be found at the following URL:
https://bugs.openwrt.org/index.php?do=details&task_id=1526