tracker-extract crashed with SIGSEGV in memcpy()

[Michael Gratton]

Crashes when extracting a specific PDF.

ProblemType: Crash
DistroRelease: Ubuntu 14.04
Package: tracker-extract 1.0.1-2ubuntu1~trusty1 [origin: LP-PPA-gnome3-team-gnome3-staging]
ProcVersionSignature: Ubuntu 3.13.0-19.40-generic 3.13.6
Uname: Linux 3.13.0-19-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.1
Architecture: amd64
CrashCounter: 1
CurrentDesktop: GNOME
Date: Fri May 16 13:07:40 2014
ExecutablePath: /usr/lib/tracker/tracker-extract
InstallationDate: Installed on 2011-06-03 (1077 days ago)
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
ProcCmdline: /usr/lib/tracker/tracker-extract
SegvAnalysis:
 Segfault happened at: 0x7f92dc030ff0: movzbl (%rsi,%rax,1),%edx
 PC (0x7f92dc030ff0) ok
 source "(%rsi,%rax,1)" (0x7f92ddfdbffe) not located in a known VMA region (needed readable region)!
 destination "%edx" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: tracker
StacktraceTop:
 ?? () from /lib/x86_64-linux-gnu/libc.so.6
 MemStream::getChars(int, unsigned char*) () from /usr/lib/x86_64-linux-gnu/libpoppler.so.44
 Stream::fillGooString(GooString*) () from /usr/lib/x86_64-linux-gnu/libpoppler.so.44
 Catalog::readMetadata() () from /usr/lib/x86_64-linux-gnu/libpoppler.so.44
 poppler_document_get_metadata () from /usr/lib/x86_64-linux-gnu/libpoppler-glib.so.8
Title: tracker-extract crashed with SIGSEGV in MemStream::getChars()
UpgradeStatus: Upgraded to trusty on 2014-02-28 (76 days ago)
UserGroups: adm admin cdrom dialout libvirtd lpadmin plugdev sambashare video

[Michael Gratton (mjog)]

Running "/usr/lib/tracker/tracker-extract -v 3", the following is reported just before the crash:

> Tracker-Message: Extracting metadata for 'file:///home/redacted/IJCAI13-512.pdf'
> Tracker-Message: MIME type passed to us as 'application/pdf'
> (tracker-extract:26961): Tracker-DEBUG: Using /usr/lib/x86_64-linux-gnu/tracker-1.0/extract-modules/libextract-pdf.so...
> Syntax Error (475118): Illegal character <7e> in hex string
> Syntax Error (475119): Illegal character <c7> in hex string
> Syntax Error (475121): Illegal character <7b> in hex string
> Syntax Error: Couldn't find trailer dictionary
> Syntax Error: Invalid XRef entry
> Syntax Error: Invalid XRef entry
> Syntax Error: Missing 'endstream' or incorrect stream length
> Segmentation fault (core dumped)

[Ubuntu GNOME (ug-bot)]

StacktraceTop:
 memcpy (__len=18446744073709081993, __src=<optimized out>, __dest=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/string3.h:51
 MemStream::getChars (this=0xa1c0d0, nChars=<optimized out>, buffer=<optimized out>) at Stream.cc:1014
 doGetChars (buffer=0x7fff7ccfe480 ' ' <repeats 75 times>, "\n", ' ' <repeats 100 times>, "\n", ' ' <repeats 23 times>..., nChars=4096, this=0xa1c0d0) at Stream.h:123
 Stream::fillGooString (this=0xa1c0d0, s=s@entry=0xaf44b0) at Stream.h:139
 Catalog::readMetadata (this=0xf779e0) at Catalog.cc:218

[Michael Gratton (mjog)]

GNOME bug: https://bugzilla.gnome.org/show_bug.cgi?id=730229