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Merge pull request #377 from jwrdegoede/oss-fuzz-35972-null-ptr-deref-fix

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Always check mdb_read_table() return value
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Evan Miller 2022-01-25 10:46:43 -05:00 committed by GitHub
commit ff085816b2
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3 changed files with 12 additions and 0 deletions
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4
src/libmdb/backend.c
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@ -872,6 +872,10 @@ generate_table_schema(FILE *outfile, MdbCatalogEntry *entry, char *dbnamespace,
fprintf (outfile, " (\n");
table = mdb_read_table (entry);
if (!table) {
fprintf(stderr, "Error: Table %s does not exist\n", entry->object_name);
return;
}
/* get the columns */
mdb_read_columns(table);

3
src/libmdb/table.c
View File

@ -361,6 +361,9 @@ unsigned int i, bitn;
guint32 pgnum;
table = mdb_read_table(entry);
if (!table)
return;
fprintf(stdout,"definition page = %lu\n",entry->table_pg);
fprintf(stdout,"number of datarows = %d\n",table->num_rows);
fprintf(stdout,"number of columns = %d\n",table->num_cols);

5
src/util/mdb-header.c
View File

@ -92,6 +92,11 @@ FILE *cfile;
entry->object_name, entry->object_name);
fprintf (cfile, "\tfprintf (stdout, \"**************** %s ****************\\n\");\n", entry->object_name);
table = mdb_read_table (entry);
if (!table) {
fprintf(stderr, "Error: Table %s does not exist in this database.\n", entry->object_name);
/* Don't bother clean up memory before exit */
exit(1);
}
/* get the columns */
mdb_read_columns (table);