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| author | Alan Modra <amodra@gmail.com> | 2022-05-24 10:47:35 +0930 |
|---|---|---|
| committer | Alan Modra <amodra@gmail.com> | 2022-05-24 12:05:39 +0930 |
| commit | be38442ddacf1fd25c8868d0491ea9e98b0e9ca7 (patch) | |
| tree | dc3cbbe07971ea3269eedaae5aef5ea1150d3300 /binutils/dwarf.c | |
| parent | 5fbb38fcc5b2157729407f182287b93531066890 (diff) | |
| download | gdb-be38442ddacf1fd25c8868d0491ea9e98b0e9ca7.zip gdb-be38442ddacf1fd25c8868d0491ea9e98b0e9ca7.tar.gz gdb-be38442ddacf1fd25c8868d0491ea9e98b0e9ca7.tar.bz2 | |
PR29171, invalid read causing SIGSEGV
The fix here is to pass "section" down to read_and_display_attr_value.
The test in read_and_display_attr_value is a little bit of hardening.
PR 29171
* dwarf.c (display_debug_macro, display_debug_names): Pass section
to read_and_display_attr_value2.
(read_and_display_attr_value): Don't attempt to check for .dwo
section name when section is NULL.
Diffstat (limited to 'binutils/dwarf.c')
| -rw-r--r-- | binutils/dwarf.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/binutils/dwarf.c b/binutils/dwarf.c index d820c21..a0dfd4d 100644 --- a/binutils/dwarf.c +++ b/binutils/dwarf.c @@ -2717,7 +2717,7 @@ read_and_display_attr_value (unsigned long attribute, case DW_FORM_strx4: if (!do_loc) { - const char *suffix = strrchr (section->name, '.'); + const char *suffix = section ? strrchr (section->name, '.') : NULL; bool dwo = suffix && strcmp (suffix, ".dwo") == 0; if (do_wide) @@ -6273,8 +6273,9 @@ display_debug_macro (struct dwarf_section *section, SAFE_BYTE_GET_AND_INC (val, desc, 1, end); curr = read_and_display_attr_value (0, val, 0, - start, curr, end, 0, 0, offset_size, - version, NULL, 0, NULL, + start, curr, end, 0, 0, + offset_size, version, + NULL, 0, section, NULL, ' ', -1); if (n != nargs - 1) printf (","); @@ -10310,7 +10311,7 @@ display_debug_names (struct dwarf_section *section, void *file) unit_start, entryptr, unit_end, 0, 0, offset_size, dwarf_version, NULL, - (tagno < 0), NULL, + (tagno < 0), section, NULL, '=', -1); } ++tagno; |