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PR29922, SHT_NOBITS section avoids section size sanity check

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PR 29922
	* dwarf2.c (find_debug_info): Ignore sections without
	SEC_HAS_CONTENTS.
This commit is contained in:
Alan Modra 2022-12-20 23:47:03 +10:30
parent 8df77a27a3
commit 8f2c64de86
1 changed files with 9 additions and 3 deletions
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12
bfd/dwarf2.c
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@ -4831,16 +4831,19 @@ find_debug_info (bfd *abfd, const struct dwarf_debug_section *debug_sections,
{
look = debug_sections[debug_info].uncompressed_name;
msec = bfd_get_section_by_name (abfd, look);
if (msec != NULL)
/* Testing SEC_HAS_CONTENTS is an anti-fuzzer measure. Of
course debug sections always have contents. */
if (msec != NULL && (msec->flags & SEC_HAS_CONTENTS) != 0)
return msec;
look = debug_sections[debug_info].compressed_name;
msec = bfd_get_section_by_name (abfd, look);
if (msec != NULL)
if (msec != NULL && (msec->flags & SEC_HAS_CONTENTS) != 0)
return msec;
for (msec = abfd->sections; msec != NULL; msec = msec->next)
if (startswith (msec->name, GNU_LINKONCE_INFO))
if ((msec->flags & SEC_HAS_CONTENTS) != 0
&& startswith (msec->name, GNU_LINKONCE_INFO))
return msec;
return NULL;
@ -4848,6 +4851,9 @@ find_debug_info (bfd *abfd, const struct dwarf_debug_section *debug_sections,
for (msec = after_sec->next; msec != NULL; msec = msec->next)
{
if ((msec->flags & SEC_HAS_CONTENTS) == 0)
continue;
look = debug_sections[debug_info].uncompressed_name;
if (strcmp (msec->name, look) == 0)
return msec;