[Crash-utility] WARNING: malloc/free mismatch

Pierguido Lambri plambri at redhat.com
Thu Apr 18 14:02:38 UTC 2019


Hello,

Today while I was looking into a vmcore, I got suddenly the message in $SUBJECT.
It started after I did a search into the process stack pages (search -t) 
and for each command I run afterwards I kept getting that message.
For example:

$ retrace-server-interact 603967269 crash
...
crash> search -t ffff88040a0d5280

search: invalid list entry: 0

search: invalid list entry: 0

search: invalid list entry: 0
PID: 606    TASK: ffff88082d226eb0  CPU: 5   COMMAND: "xfsaild/dm-0"
ffff88083ff5b948: ffff88040a0d5280 
ffff88083ff5b990: ffff88040a0d5280 
ffff88083ff5baa8: ffff88040a0d5280 
ffff88083ff5baf0: ffff88040a0d5280 
ffff88083ff5bcf0: ffff88040a0d5280 
ffff88083ff5bd38: ffff88040a0d5280 
ffff88083ff5bd98: ffff88040a0d5280 


WARNING: malloc/free mismatch (29/32)

crash> ps -m | grep UN
[ 0 00:00:00.146] [UN]  PID: 1811   TASK: ffff880c17bd1fa0  CPU: 1   COMMAND: "cp"
WARNING: malloc/free mismatch (29/32)

I guess this comes from a possible corrupted vmcore (I just got it from this vmcore),
but I wonder why every new command keeps returning the same message.

Thanks,

Pier




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