[tor-bugs] #26311 [Core Tor/Tor]: Error in `/usr/bin/tor': free(): invalid next size (normal): 0x000055ed468598d0

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#26311: Error in `/usr/bin/tor': free(): invalid next size (normal):
0x000055ed468598d0
--------------------------+---------------------------------
 Reporter:  cypherpunks   |          Owner:  (none)
     Type:  defect        |         Status:  new
 Priority:  Medium        |      Milestone:
Component:  Core Tor/Tor  |        Version:  Tor: 0.3.3.5-rc
 Severity:  Normal        |     Resolution:
 Keywords:                |  Actual Points:
Parent ID:                |         Points:
 Reviewer:                |        Sponsor:
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Comment (by starlight):

 Replying to [comment:11 pascal.levasseur]:
 >
 > The disk system is a "Virtual SSD" somewhere in the infrastructure using
 nbd. . .

 Crossed my mind the "network block device" (iSCSI?) could be corrupting
 MMAP'ed cached-* or diff-cache files somehow.  I distrust network storage
 for critical applications and have not seen a network solution half as
 reliable a set of locally attached drives in RAID1/5/6.  I'd take a single
 bare SSD over network storage.

 If not already configured, try adding

 {{{
 DisableAllSwap 1
 }}}

 to `torrc`, which should eliminate paging and lower the probabality of the
 aforesaid.  Verify it's working by issuing

 {{{
 cat /proc/<tor_pid>/status
 }}}

 and checking that `VmLck` is the same as `VmSize` less 4 or something like
 that.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/26311#comment:20>
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