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pg_verifybackup failed to detect truncated compressed tar backups for zstd, lz4 and gzip compression. astreamer_zstd_decompressor checked whether ZSTD_decompressStream() returned an error. However, a positive return value at end-of-input means that the final zstd frame has not completed. Record the state and verify at finalization that zstd completed the frame. Also flush any pending internally buffered output before performing that check. astreamer_gzip_decompressor did not check whether inflate() had reached Z_STREAM_END before finalizing. Record whether inflate() completed the gzip stream, and reject finalization if it did not. astreamer_lz4_decompressor did not check whether LZ4F_decompress() completed the final frame before finalizing. Record the status of decompression and reject finalization unless the frame completed. This prevents pg_verifybackup from accepting a truncated compressed tar backup. Author: Chao Li <lic@highgo.com> Co-authored-by: Daniel Gustafsson <daniel@yesql.se> Reviewed-by: Osama Abdul Qader <osamaabdulqader.cs@gmail.com> Reviewed-by: Zsolt Parragi <zsolt.parragi@percona.com> Reviewed-by: Japin Li <japinli@hotmail.com> Discussion: https://postgr.es/m/5962B878-C43D-4EBC-9E95-1F945CE5E586@gmail.com Backpatch-through: 19
PostgreSQL Database Management System
This directory contains the source code distribution of the PostgreSQL database management system.
PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings.
Copyright and license information can be found in the file COPYRIGHT.
General documentation about this version of PostgreSQL can be found at https://www.postgresql.org/docs/devel/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/devel/installation.html.
The latest version of this software, and related software, may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.