[FS#3331] network restart endless

OpenWrt Bugs openwrt-bugs at lists.openwrt.org
Fri Sep 11 00:27:50 EDT 2020


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

User who did this - WengZuyang (wengzuyang) 

Attached to Project - OpenWrt/LEDE Project
Summary - network restart endless
Task Type - Bug Report
Category - Base system
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - Low
Priority - Very Low
Reported Version - All
Due in Version - Undecided
Due Date - Undecided
Details - 1. Software versions
    Chaos Calmer
2. there is two ways to reproduce:
   a).type commond "/etc/init.d/network restart" when device power on and starting network.(small chance to reproduce in this way)
   b). type commond "/etc/init.d/network restart;/etc/init.d/network restart".(always reproduce in this way)
3. I fllowed codes and find the reason:
    netifd can not be terminate by "ubus call service delete '{"name":"network"}'"
    there are multiple netifd processing:

    5962 ?        S      0:02 [kworker/0:0]
    7576 ttymxc0  Ss     0:00 -ash
    8708 ?        S      0:00 /sbin/netifd
    8723 ?        S      0:00 [kworker/0:1]
    8965 ?        S      0:00 /sbin/netifd
    9011 ?        S      0:00 /sbin/netifd
    9054 ?        S      0:00 /sbin/netifd
    9125 ?        S      0:00 /sbin/netifd
    9212 ?        S      0:00 /sbin/netifd
    9317 ?        S      0:00 /sbin/netifd
    9392 ?        S      0:00 /sbin/netifd

    the reason of netifd can not be killed is:
    netifd reseived TERM signal and run uloop_end() before uloop_run()
    so uloop_cancelled(in libubox) is reset to false when uloop_run()
4. my solution:
    delete the line:
    uloop_cancelled = false; --> in void uloop_run(void) --> in uloop.c --> in libubox-2015-11-08(new version libubox have this line too)
    uloop_cancelled is already init by "bool uloop_cancelled = false;",it is no need reset to false by uloop_run() again.

More information can be found at the following URL:
https://bugs.openwrt.org/index.php?do=details&task_id=3331

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