debug/elf: slice bounds out of range (original) (raw)

Description

The following program crashes with the panic on the provided inputs:

package main

import ( "bytes" "debug/elf" "io/ioutil" "os" )

func main() { data, _ := ioutil.ReadFile(os.Args[1]) f, err := elf.NewFile(bytes.NewReader(data)) if err != nil { if f != nil { panic("file is not nil on error") } return } defer f.Close() f.DynamicSymbols() f.ImportedLibraries() f.ImportedSymbols() f.Section(".data") f.SectionByType(elf.SHT_GNU_VERSYM) f.Symbols() dw, err := f.DWARF() if err != nil { if dw != nil { panic("dwarf is not nil on error") } return } dr := dw.Reader() for { e, _ := dr.Next() if e == nil { break } } }

On input https://drive.google.com/file/d/0B20Uwp8Hs1oCQmk0YU1JaXM1N0E/view?usp=sharing

panic: runtime error: slice bounds out of range

goroutine 1 [running]:
debug/elf.(*File).DynString(0xc208076000, 0x1, 0x0, 0x0, 0x0, 0x0, 0x0)
    src/debug/elf/file.go:1053 +0x6ad
debug/elf.(*File).ImportedLibraries(0xc208076000, 0x0, 0x0, 0x0, 0x0, 0x0)
    src/debug/elf/file.go:1015 +0x4e
main.main()
    elftest.go:21 +0x1ec

On input https://drive.google.com/file/d/0B20Uwp8Hs1oCOXlsZGhXY2NhOW8/view?usp=sharing

panic: runtime error: index out of range

goroutine 1 [running]:
encoding/binary.(*littleEndian).Uint16(0x645be8, 0xc20800a954, 0x1, 0x1, 0xc208040003)
    <autogenerated>:8 +0xc9
debug/elf.(*File).gnuVersion(0xc208076000, 0x14, 0xc2080800f0)
    src/debug/elf/file.go:1002 +0xb8
debug/elf.(*File).ImportedSymbols(0xc208076000, 0x0, 0x0, 0x0, 0x0, 0x0)
    src/debug/elf/file.go:914 +0x348
main.main()
    elftest.go:22 +0x1fa

on commit 596bb76