Add initial wallet_bdb_parser corpus #140

1. 
   Sjors commented at 10:30 am on August 1, 2023: member

   Generated on Ubuntu 23.04 using Clang 15.0.7 and libFuzzer --with-sanitizers=fuzzer

   Generated by running the wallet_bdb_parser target in https://github.com/bitcoin/bitcoin/pull/26606 for about a day on AMD Ryzen 9 7950X.

   I used test/fuzz/test_runner.py --m_dir which reduced the inputs from 1210 (200KB) to 116 (2 KB).

   I wonder if it makes sense to manually generate some inputs based on real (testnet) wallets.

2. Add initial wallet_bdb_parser corpus

   Generated on Ubuntu 23.04 using Clang 15.0.7.
   --with-sanitizers=fuzzer

   d2b9afd099
3. 
   Sjors commented at 10:34 am on August 1, 2023: member

   cc @achow101 @thecharlatan
4. 
   maflcko commented at 11:02 am on August 1, 2023: contributor

   I wonder if it makes sense to manually generate some inputs based on real (testnet) wallets.

   This should be trivially possible by removing the use of ConsumeRandomLengthByteVector/FuzzedDataProvider and replace it with outfile << Span{buffer};

5. Additional wallet_bdb_parser coverage from real wallet

   3ae851ea6b6b5a15fa168c598b15aee1282d2b0f is a regtest wallet
   90090898d8dd570e4003cfb42b0eaf97e05290ee produces a crash

   28d9be11b8
6. 
   Sjors commented at 5:59 pm on August 2, 2023: member

   Pushed a commit that contains a wallet and a crash. Let me know if it’s non-trivial to reproduce.
7. Add wallet_bdb_parser crash 485cd07607
8. 
   Sjors commented at 8:55 am on August 3, 2023: member

   bda20e7f3777a147f944da4a50b9147e68b7f4b0 produces a UndefinedBehaviorSanitizer for me with https://github.com/bitcoin/bitcoin/pull/26606/commits/a7508fedcb529324bb1009455151800138e09022.
9. 
   maflcko commented at 2:19 pm on June 3, 2024: contributor

   Are you still working on this?
10. 
    Sjors commented at 3:04 pm on June 4, 2024: member

    Probably not, will the commits up for grabs if someone wants to take a stab.
11. Sjors closed this on Jun 4, 2024

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Contributors
Sjors maflcko