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| author | Alan Modra <amodra@gmail.com> | 2022-12-20 23:47:03 +1030 |
|---|---|---|
| committer | Alan Modra <amodra@gmail.com> | 2022-12-21 17:55:34 +1030 |
| commit | 8f2c64de86bc3d7556121fe296dd679000283931 (patch) | |
| tree | a327022ff9118436e4629396e2752513d2202f2c /bfd | |
| parent | 8df77a27a3a329ba7c1611f4dbbc32f39d4734bb (diff) | |
| download | fsf-binutils-gdb-8f2c64de86bc3d7556121fe296dd679000283931.zip fsf-binutils-gdb-8f2c64de86bc3d7556121fe296dd679000283931.tar.gz fsf-binutils-gdb-8f2c64de86bc3d7556121fe296dd679000283931.tar.bz2 | |
PR29922, SHT_NOBITS section avoids section size sanity check
PR 29922
* dwarf2.c (find_debug_info): Ignore sections without
SEC_HAS_CONTENTS.
Diffstat (limited to 'bfd')
| -rw-r--r-- | bfd/dwarf2.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/bfd/dwarf2.c b/bfd/dwarf2.c index 95f4570..0cd8152 100644 --- a/bfd/dwarf2.c +++ b/bfd/dwarf2.c @@ -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; |