AFL++ run 14276794805: crashes or hangs found for read_csv() on: 946a2bd1bf8a72997f3d8e99420790a6df17166a

[fuzzerofducks]

Issue found by csv_multi_param_fuzzer for duckdb commit hash 946a2bd1bf8a72997f3d8e99420790a6df17166a

• crashes found: 15
• hangs found: 4

Scenario

duckdb:

• SHA: 946a2bd1bf8a72997f3d8e99420790a6df17166a
• version: v1.3.0-dev2212 946a2bd1bf
• ref: main

fuzzer:

• scenrio: csv_multi_param_fuzzer
• CI: duckdblabs/duckdb-fuzzer-ci -> Fuzz DuckDb File Readers -> run 14276794805
• reproduction files

Reproduction

steps:

1. download the csv files generated by the fuzzer from https://github.com/duckdb/duckdb-fuzzer/tree/main/fuzz_result_duckdb_file_readers/run_14276794805/main-946a2bd1bf8a72997f3d8e99420790a6df17166a/csv_multi_param_fuzzer

git clone --no-checkout git@github.com:duckdb/duckdb-fuzzer.git afl_repr
cd afl_repr
git sparse-checkout set --no-cone fuzz_result_duckdb_file_readers/run_14276794805/main-946a2bd1bf8a72997f3d8e99420790a6df17166a/csv_multi_param_fuzzer
git checkout

2. copy the sqllogic test to a local duckdb repo; update the paths in the file to point to the location where you downloaded the csv files
   https://github.com/duckdb/duckdb-fuzzer/tree/main/fuzz_result_duckdb_file_readers/run_14276794805/main-946a2bd1bf8a72997f3d8e99420790a6df17166a/csv_multi_param_fuzzer/csv_multi_param_fuzzer-946a2bd1bf8a72997f3d8e99420790a6df17166a.test
   https://github.com/duckdb/duckdb-fuzzer/tree/main/fuzz_result_duckdb_file_readers/run_14276794805/main-946a2bd1bf8a72997f3d8e99420790a6df17166a/csv_multi_param_fuzzer/csv_multi_param_fuzzer-946a2bd1bf8a72997f3d8e99420790a6df17166a-hangs.test

3. run the sqllogic tests to reproduce the error. Note that some crashes do not occur every run, so run multiple times if needed.