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PR28542, Undefined behaviours in readelf.c

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PR 28542
	* readelf.c (dump_relocations): Check that section headers have
	been read before attempting to access section name.
	(print_dynamic_symbol): Likewise.
	(process_mips_specific): Delete dead code.
This commit is contained in:
Alan Modra
2021-11-09 09:02:03 +10:30
parent 5da7a3deab
commit b9af637988
1 changed files with 3 additions and 2 deletions
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5
binutils/readelf.c
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@ -1934,7 +1934,8 @@ dump_relocations (Filedata * filedata,
if (ELF_ST_TYPE (psym->st_info) == STT_SECTION)
{
if (psym->st_shndx < filedata->file_header.e_shnum)
if (psym->st_shndx < filedata->file_header.e_shnum
&& filedata->section_headers != NULL)
sec_name = section_name_print (filedata,
filedata->section_headers
+ psym->st_shndx);
@ -12861,6 +12862,7 @@ print_dynamic_symbol (Filedata *filedata, unsigned long si,
if (ELF_ST_TYPE (psym->st_info) == STT_SECTION
&& psym->st_shndx < filedata->file_header.e_shnum
&& filedata->section_headers != NULL
&& psym->st_name == 0)
{
is_valid
@ -18262,7 +18264,6 @@ process_mips_specific (Filedata * filedata)
Elf_External_Options * eopt;
size_t offset;
int cnt;
sect = filedata->section_headers;
/* Find the section header so that we get the size. */
sect = find_section_by_type (filedata, SHT_MIPS_OPTIONS);