change_current_mood() receives an errmsg pointer which the callers
expect to be initialized with an error string if (and only if) the
function returns negative.
However, most error paths miss to initialize the pointer which results
in undefined behaviour in the caller which attempts to free(3)
uninitialized memory. The gcc AddressSanitizer and valgrind both
catch this:
gcc:
==14788==ERROR: AddressSanitizer: attempting free on address which was not malloc()-ed: 0x081af250 in thread T0
valgrind:
==4410== Invalid free() / delete / delete[] / realloc()
The bug was introduced half a year ago when version 2 moods were
introduced in commit
3d3a2f50.
*m = NULL;
ret = mood_get_name_and_def_by_row(mood_row, &mood_name, &mood_def);
*m = NULL;
ret = mood_get_name_and_def_by_row(mood_row, &mood_name, &mood_def);
+ if (ret < 0) {
+ if (errmsg)
+ *errmsg = make_message(
+ "could not read mood definition");
- if (!*mood_name)
- return -E_DUMMY_ROW;
+ }
+ assert(*mood_name);
mlpd.m = alloc_new_mood(mood_name);
ret = for_each_line(FELF_READ_ONLY, mood_def.data, mood_def.size,
parse_mood_line, &mlpd);
mlpd.m = alloc_new_mood(mood_name);
ret = for_each_line(FELF_READ_ONLY, mood_def.data, mood_def.size,
parse_mood_line, &mlpd);
};
ret = osl(osl_get_row(moods_table, BLOBCOL_NAME, &obj, &row));
if (ret < 0) {
};
ret = osl(osl_get_row(moods_table, BLOBCOL_NAME, &obj, &row));
if (ret < 0) {
- PARA_NOTICE_LOG("no such mood: %s\n", mood_name);
+ if (errmsg)
+ *errmsg = make_message("no such mood: %s",
+ mood_name);
return ret;
}
ret = load_mood(row, &m, errmsg);
return ret;
}
ret = load_mood(row, &m, errmsg);
aa.m = current_mood;
PARA_NOTICE_LOG("computing statistics of admissible files\n");
ret = audio_file_loop(&aa, add_if_admissible);
aa.m = current_mood;
PARA_NOTICE_LOG("computing statistics of admissible files\n");
ret = audio_file_loop(&aa, add_if_admissible);
+ if (ret < 0) {
+ if (errmsg)
+ *errmsg = make_message("audio file loop failed");
for (i = 0; i < statistics.num; i++) {
struct admissible_file_info *a = aa.array + i;
ret = add_to_score_table(a->aft_row, a->score);
for (i = 0; i < statistics.num; i++) {
struct admissible_file_info *a = aa.array + i;
ret = add_to_score_table(a->aft_row, a->score);
+ if (ret < 0) {
+ if (errmsg)
+ *errmsg = make_message(
+ "could not add row to score table");
}
log_statistics();
ret = statistics.num;
}
log_statistics();
ret = statistics.num;