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More fixes for invalid memory accesses triggered by fuzzed binaries.

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PR binutils/17531
	* dwarf.c (alloc_num_debug_info_entries): New variable.
	(process_debug_info): Set it.  Use it to avoid displaying
	attributes for which there is no info.
	(display_debug_abbrev): Check that the debug_info_entry index is
	valid before using it.
	(display_loc_list_dwo): Likewise.
	(process_cu_tu_index): Add range check for an overlarge dw_sect
	value.
	(free_debug_memory): Reset alloc_num_debug_info_entries.
	* readelf.c (slurp_ia64_unwind_table): Warn if the reloc could not
	be indentified.
	(dynamic_section_mips_val): Warn if the timestamp is invalid.
	(print_mips_got_entry): Add a data_end parameter.  Warn if a read
	would go beyond the end of the data, and return an error value.
	(process_mips_specific): Do not read options from beyond the end
	of the section.
	Correct code to display optional data at the end of an option.
	Warn if there are too many GOT symbols.
	Update calls to print_mips_got_entry, and handle error returns.
This commit is contained in:
Nick Clifton
2015-01-05 13:54:22 +00:00
parent c1724c7fd3
commit 82b1b41bcd
4 changed files with 180 additions and 58 deletions
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8
binutils/dwarf.h
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@@ -248,10 +248,10 @@ extern void dwarf_select_sections_by_names (const char *);
extern void dwarf_select_sections_by_letters (const char *);
extern void dwarf_select_sections_all (void);
unsigned int * find_cu_tu_set (void *, unsigned int);
extern unsigned int * find_cu_tu_set (void *, unsigned int);
void * cmalloc (size_t, size_t);
void * xcmalloc (size_t, size_t);
void * xcrealloc (void *, size_t, size_t);
extern void * cmalloc (size_t, size_t);
extern void * xcmalloc (size_t, size_t);
extern void * xcrealloc (void *, size_t, size_t);
extern dwarf_vma read_leb128 (unsigned char *, unsigned int *, bfd_boolean, const unsigned char * const);