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XPDF v4.04
poc: https://github.com/huanglei3/xpdf_Stack-backtracking/blob/main/gstring_poc
pdftotext gstring_poc
Syntax Error: Couldn't read xref table
Syntax Warning: PDF file is damaged - attempting to reconstruct xref table...
Syntax Error (2786): Dictionary key must be a name object
Syntax Error (2790): Dictionary key must be a name object
Syntax Error (2795): Dictionary key must be a name object
Syntax Error: Dictionary key must be a name object
Syntax Error: End of file inside dictionary
Syntax Error (485): Illegal character <3d> in hex string
Syntax Error (490): Illegal character <80> in hex string
Syntax Error (491): Illegal character <67> in hex string
Syntax Error (492): Illegal character <74> in hex string
Syntax Error (493): Illegal character <68> in hex string
Syntax Error (501): Illegal character '>'
Syntax Error (49): Dictionary key must be a name object
Syntax Error (54): Dictionary key must be a name object
Syntax Error (60): Dictionary key must be a name object
Syntax Error (65): Dictionary key must be a name object
Syntax Error (70): Dictionary key must be a name object
Syntax Error (80): Dictionary key must be a name object
Syntax Error (203): Dictionary key must be a name object
Syntax Error (243): Dictionary key must be a name object
Syntax Error (401): Dictionary key must be a name object
Syntax Error (410): Dictionary key must be a name object
Syntax Error (411): Dictionary key must be a name object
Syntax Error (422): Dictionary key must be a name object
Syntax Error (485): Illegal character <3d> in hex string
Syntax Error (490): Illegal character <80> in hex string
Syntax Error (491): Illegal character <67> in hex string
Syntax Error (492): Illegal character <74> in hex string
Syntax Error (493): Illegal character <68> in hex string
Syntax Error (501): Illegal character '>'
Syntax Error (1028): Illegal character ')'
Syntax Error (1437): Illegal character ')'
Syntax Error (1643): Dictionary key must be a name object
Syntax Error (1941): Illegal character ')'
Syntax Error (2035): Illegal character ')'
Syntax Error (2474): Illegal character '>'
Syntax Error (2476): Illegal character <2f> in hex string
Syntax Error (2477): Illegal character <72> in hex string
Syntax Error (2480): Illegal character <54> in hex string
Syntax Error (2481): Illegal character <73> in hex string
Syntax Error (2482): Illegal character <69> in hex string
Syntax Error (2484): Illegal character <6e> in hex string
Syntax Error (2486): Illegal character <6f> in hex string
Syntax Error (2488): Illegal character <69> in hex string
Syntax Error (2489): Illegal character <6e> in hex string
Syntax Error (2490): Illegal character <67> in hex string
Syntax Error (2494): Illegal character '>'
Syntax Error: Unterminated string
Syntax Error: End of file inside dictionary
Syntax Error: End of file inside array
Syntax Error: End of file inside dictionary
Syntax Error (401): Dictionary key must be a name object
Syntax Error (410): Dictionary key must be a name object
Syntax Error (411): Dictionary key must be a name object
Syntax Error (422): Dictionary key must be a name object
Syntax Error (485): Illegal character <3d> in hex string
Syntax Error (490): Illegal character <80> in hex string
Syntax Error (491): Illegal character <67> in hex string
Syntax Error (492): Illegal character <74> in hex string
Syntax Error (493): Illegal character <68> in hex string
Syntax Error (501): Illegal character '>'
Syntax Error (1643): Dictionary key must be a name object
Program received signal SIGSEGV, Segmentation fault.
► f 0 0x555555846739 GString::resize(int)+1305
f 1 0x55555583fea1 GString::GString(GString*)+33
f 2 0x5555557c01de Object::copy(Object*)+270
f 3 0x5555557c01de Object::copy(Object*)+270
f 4 0x55555582cbd8
f 5 0x555555675364 Catalog::countPageTree(Object*)+228
f 6 0x555555675364 Catalog::countPageTree(Object*)+228
f 7 0x5555556754d3 Catalog::countPageTree(Object*)+595
(gdb) bt
#0 0x0000555555846739 in GString::resize (this=this@entry=0x555555b88a20, length1=<optimized out>) at /home/fuzz/fuzzing_xpdf/xpdf-4.04/goo/GString.cc:109
#1 0x000055555583fea1 in GString::GString (this=0x555555b88a20, str=0x555555b88760) at /home/fuzz/fuzzing_xpdf/xpdf-4.04/goo/GString.h:80
#2 0x00005555557c01de in GString::copy (this=0x555555b88760) at /home/fuzz/fuzzing_xpdf/xpdf-4.04/goo/GString.h:42
#3 Object::copy (this=this@entry=0x555555b84078, obj=obj@entry=0x7fffff7ff1a0) at /home/fuzz/fuzzing_xpdf/xpdf-4.04/xpdf/Object.cc:84
#4 0x000055555582cbd8 in XRef::fetch (this=0x555555b83990, num=<optimized out>, gen=<optimized out>, obj=0x7fffff7ff1a0, recursion=<optimized out>) at /home/fuzz/fuzzing_xpdf/xpdf-4.04/xpdf/XRef.cc:1212
#5 0x0000555555675364 in Object::dictLookup (this=<optimized out>, recursion=0, obj=0x7fffff7ff1a0, key=0x5555558a07c7 "Kids") at /home/fuzz/fuzzing_xpdf/xpdf-4.04/xpdf/Object.h:267
#6 Catalog::countPageTree (this=0x555555b5d4a0, pagesObj=<optimized out>) at /home/fuzz/fuzzing_xpdf/xpdf-4.04/xpdf/Catalog.cc:563
#7 0x00005555556754d3 in Catalog::countPageTree (this=0x555555b5d4a0, pagesObj=<optimized out>) at /home/fuzz/fuzzing_xpdf/xpdf-4.04/xpdf/Catalog.cc:567
#8 0x00005555556754d3 in Catalog::countPageTree (this=0x555555b5d4a0, pagesObj=<optimized out>) at /home/fuzz/fuzzing_xpdf/xpdf-4.04/xpdf/Catalog.cc:567
#9 0x00005555556754d3 in Catalog::countPageTree (this=0x555555b5d4a0, pagesObj=<optimized out>) at /home/fuzz/fuzzing_xpdf/xpdf-4.04/xpdf/Catalog.cc:567
#10 0x00005555556754d3 in Catalog::countPageTree (this=0x555555b5d4a0, pagesObj=<optimized out>) at /home/fuzz/fuzzing_xpdf/xpdf-4.04/xpdf/Catalog.cc:567
#11 0x00005555556754d3 in Catalog::countPageTree (this=0x555555b5d4a0, pagesObj=<optimized out>) at /home/fuzz/fuzzing_xpdf/xpdf-4.04/xpdf/Catalog.cc:567