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| author | H.J. Lu <hjl.tools@gmail.com> | 2017-06-26 09:24:49 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2017-06-26 09:30:20 -0700 |
| commit | 0630b49c470ca2e3c3f74da4c7e4ff63440dd71f (patch) | |
| tree | 25a1dd82b803549a5cc0c33d417ae6d63dadd2d9 /bfd/libbfd.c | |
| parent | 515a4464176efc6ac31c83bd40b5c67f61c3b044 (diff) | |
| download | fsf-binutils-gdb-0630b49c470ca2e3c3f74da4c7e4ff63440dd71f.zip fsf-binutils-gdb-0630b49c470ca2e3c3f74da4c7e4ff63440dd71f.tar.gz fsf-binutils-gdb-0630b49c470ca2e3c3f74da4c7e4ff63440dd71f.tar.bz2 | |
Check file size before getting section contents
Don't check the section size in bfd_get_full_section_contents since
the size of a decompressed section may be larger than the file size.
Instead, check file size in _bfd_generic_get_section_contents.
PR binutils/21665
* compress.c (bfd_get_full_section_contents): Don't check the
file size here.
* libbfd.c (_bfd_generic_get_section_contents): Check for and
reject a section whoes size + offset is greater than the size
of the entire file.
(_bfd_generic_get_section_contents_in_window): Likewise.
Diffstat (limited to 'bfd/libbfd.c')
| -rw-r--r-- | bfd/libbfd.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/bfd/libbfd.c b/bfd/libbfd.c index 554234f..b903328 100644 --- a/bfd/libbfd.c +++ b/bfd/libbfd.c @@ -789,6 +789,7 @@ _bfd_generic_get_section_contents (bfd *abfd, bfd_size_type count) { bfd_size_type sz; + file_ptr filesz; if (count == 0) return TRUE; @@ -811,8 +812,15 @@ _bfd_generic_get_section_contents (bfd *abfd, sz = section->rawsize; else sz = section->size; + filesz = bfd_get_file_size (abfd); + if (filesz < 0) + { + /* This should never happen. */ + abort (); + } if (offset + count < count - || offset + count > sz) + || offset + count > sz + || (section->filepos + offset + sz) > (bfd_size_type) filesz) { bfd_set_error (bfd_error_invalid_operation); return FALSE; @@ -835,6 +843,7 @@ _bfd_generic_get_section_contents_in_window { #ifdef USE_MMAP bfd_size_type sz; + file_ptr filesz; if (count == 0) return TRUE; @@ -867,7 +876,13 @@ _bfd_generic_get_section_contents_in_window sz = section->rawsize; else sz = section->size; + filesz = bfd_get_file_size (abfd); + { + /* This should never happen. */ + abort (); + } if (offset + count > sz + || (section->filepos + offset + sz) > (bfd_size_type) filesz || ! bfd_get_file_window (abfd, section->filepos + offset, count, w, TRUE)) return FALSE; |