kernel: Slab corruption

[dahyippur]

Recently picked up a second hand ac86u and flashed merlin's latest firmware. Have not made a ton of changes , just restored factory defaults, loaded flexqos, disable 5ghz radio, couple other minor things. I noticed this in the syslog today and couldn't find any posts about it, anyone know what this means?

Mar 24 22:06:18 wlceventd: wlceventd_proc_event(507): eth5: Disassoc 70:F1:xx:xx:xx:xx, status: 0, reason: Disassociated because sending station is leaving (or has left) BSS (8), rssi:0
Mar 24 22:30:31 wlceventd: wlceventd_proc_event(526): eth5: Auth 70:F1:xx:xx:xx:xx, status: Successful (0), rssi:0
Mar 24 22:30:31 kernel: Slab corruption (Tainted: P O ): bridge_fdb_cache start=ffffffc0191babc0, len=72
Mar 24 22:30:31 kernel: 040: 00 00 00 00 6b 6b 6b a5 ....kkk.
Mar 24 22:30:31 kernel: Prev obj: start=ffffffc0191bab40, len=72
Mar 24 22:30:31 kernel: 000: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
Mar 24 22:30:31 kernel: 010: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
Mar 24 22:30:31 kernel: Next obj: start=ffffffc0191bac40, len=72
Mar 24 22:30:31 kernel: 000: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
Mar 24 22:30:31 kernel: 010: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
Mar 24 22:30:31 wlceventd: wlceventd_proc_event(536): eth5: ReAssoc 70:F1:xx:xx:xx:xx, status: Successful (0), rssi:0
Mar 24 22:30:31 dnsmasq-dhcp[17872]: DHCPREQUEST(br0) 192.168.50.5 70:f1:xx:xx:xx:xx
Mar 24 22:30:31 dnsmasq-dhcp[17872]: DHCPACK(br0) 192.168.50.5 70:f1:xx:xx:xx:xx pguru
Mar 24 22:30:31 kernel: 70:F1:xx:xx:xx:xx not mesh client, can't update it's ip
Mar 24 22:30:33 dnsmasq-dhcp[17872]: DHCPREQUEST(br0) 192.168.50.5 70:f1:xx:xx:xx:xx
Mar 24 22:30:33 dnsmasq-dhcp[17872]: DHCPACK(br0) 192.168.50.5 70:f1:xx:xx:xx:xx pguru
Mar 24 22:31:19 wlceventd: wlceventd_proc_event(490): eth5: Deauth_ind 70:F1:xx:xx:xx:xx, status: 0, reason: Disassociated due to inactivity (4), rssi:0

 

[joe scian]

Recently picked up a second hand ac86u and flashed merlin's latest firmware. Have not made a ton of changes , just restored factory defaults, loaded flexqos, disable 5ghz radio, couple other minor things. I noticed this in the syslog today and couldn't find any posts about it, anyone know what this means?

too much gravel in the mix

 

[dahyippur]

Happened again this morning as I woke the desktop pc, very mysterious

Mar 26 03:30:00 FlexQoS: No TC modifications necessary
Mar 26 03:58:09 kernel: eth4 (Ext switch port: 3) (Logical Port: 11) Link UP 1000 mbps full duplex
Mar 26 03:58:09 kernel: br0: port 4(eth4) entered listening state
Mar 26 03:58:09 kernel: br0: port 4(eth4) entered listening state
Mar 26 03:58:11 kernel: br0: port 4(eth4) entered learning state
Mar 26 03:58:13 kernel: br0: topology change detected, propagating
Mar 26 03:58:13 kernel: br0: port 4(eth4) entered forwarding state
Mar 26 03:58:13 kernel: Slab corruption (Tainted: P O ): bridge_fdb_cache start=ffffffc015b95240, len=72
Mar 26 03:58:13 kernel: 040: 00 00 00 00 6b 6b 6b a5 ....kkk.
Mar 26 03:58:13 kernel: Prev obj: start=ffffffc015b951c0, len=72
Mar 26 03:58:13 kernel: 000: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
Mar 26 03:58:13 kernel: 010: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
Mar 26 03:58:13 kernel: Next obj: start=ffffffc015b952c0, len=72
Mar 26 03:58:13 kernel: 000: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
Mar 26 03:58:13 kernel: 010: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
Mar 26 03:58:15 dnsmasq-dhcp[1165]: DHCPREQUEST(br0) 192.168.50.138 bc:ee:xx:xx:xx:xx

 

[Begotten]

Hi all,
I've got the same question (in this link), but still dont know what's the meaning
btw I'm not seeing any real problem

 

[raven-au]

It's not hard to find out what the linux kernel slab allocator is with a web search.

I don't think the memory used by the slab allocator is swapable so it might be faulty memory hardware, or a bug in the kernel. It might be from a failure to allocate a chunk of memory from the memory reserved for the slab. You have not way of knowing unless you have the source code for the kernel component issuing the messages.