Re: [BackupPC-devel] v4.0alpha2 backup error

[Craig B. <cba...@us...>]

Steve,

This looks like some sort of memory or freelist corruption in
BackupPC_tarExtract:

 *** glibc detected *** /usr/bin/perl: realloc(): invalid next size:
0x093bd438 ***


This error is deep inside perl, and normally shouldn't happen when you are
running any sort of perl code. But... a dynamically linked module like
BackupPC::XS could be a culprit.  I did run tests on the underlying library
using the address sanitizer checks in LLVM, and it was clean.  But maybe I
didn't have enough test cases.

The challenge is to replicate this on my machine (or get me access to a
machine that shows the problem).  I'm guessing it is subtly dependent on
the exact tar file being piped into BackupPC_tarExtract from the client.

The good new is the error appears to happen very early in the backup, which
makes debugging a bit easier.  Can you set the XferLOG level to say 9 and
send me the whole XferLOG file?  (Don't copy it to the list.)

Craig