OpenWrt/LEDE Project

  • Status Closed
  • Percent Complete
    100%
  • Task Type Bug Report
  • Category Kernel
  • Assigned To No-one
  • Operating System All
  • Severity Low
  • Priority Very Low
  • Reported Version Trunk
  • Due in Version Undecided
  • Due Date Undecided
  • Private
Attached to Project: OpenWrt/LEDE Project
Opened by camel - 22.03.2019
Last edited by Yousong Zhou - 22.07.2020

FS#2201 - kernel error: do_page_fault(): sending SIGSEGV to reader#1 for invalid read access from 77a87d90

current trunk from 22.3.2019
git-19.079.18950-11e64f8) / OpenWrt SNAPSHOT r9672-d78e229903

i see in the logs that having more often kernel error:

Fri Mar 22 15:14:27 2019 kern.info kernel: [11750.766284] do_page_fault(): sending SIGSEGV to reader#1 for invalid read access from 77a87d90
Fri Mar 22 15:14:27 2019 kern.info kernel: [11750.774984] epc = 77f55944 in libc.so[77edb000+94000]
Fri Mar 22 15:14:27 2019 kern.info kernel: [11750.780320] ra  = 77f558e0 in libc.so[77edb000+94000]

any idea about what can be the reason for it ? or how i can give you more infos ?

Closed by  Yousong Zhou
22.07.2020 08:21
Reason for closing:  Fixed
Additional comments about closing:  

Should be collectd and now fixed in collectd 5.11.

camel commented on 30.03.2019 11:01

i have this kernel issue every day around 2-3 times ... :(
same address

Sat Mar 30 07:48:57 2019 kern.info kernel: [524298.382997] do_page_fault(): sending SIGSEGV to reader#1 for invalid read access from 77ac1d90
Sat Mar 30 07:48:57 2019 kern.info kernel: [524298.391883] epc = 77f8f944 in libc.so[77f15000+94000]
Sat Mar 30 07:48:57 2019 kern.info kernel: [524298.397135] ra  = 77f8f8e0 in libc.so[77f15000+94000]

device: ZBT-3526 16MB (mt7621)
and i see no lines before or afterwards :(

camel commented on 02.05.2019 14:55

any news ?
was anyone looking on that ?
nothing ?

Simon Tretter commented on 14.07.2019 01:59

Did you build yourself? If so, any changes to the defaults (gcc version, optmization flags...)?

Project Manager
Yousong Zhou commented on 06.11.2019 13:42

Are you running collectd and do you happen to have more than 1 WriteThreads? This one and  FS#2264  are likely the same issue

camel commented on 13.11.2019 17:38

yes, I'm using the collectd very much ...
and writethreads are on 2 or 4 - depends on cpu and mem (eg: mt7621 - using 4 / mt7620 - using 2)
should i try to set it to 1 ?

Project Manager
Yousong Zhou commented on 13.11.2019 18:20

It's worth a try. I worked around it that way after https://github.com/collectd/collectd/pull/3310

camel commented on 17.11.2019 09:25

hmm, i will test with deactivated nf_cache module

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