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bd65cb3cd4
Previously, pg_logicalinspect functions were too trusting of their input and blindly passed it to SnapBuildRestoreSnapshot(). If the input pointed to a directory, the server could a PANIC error while attempting to fsync_fname() with isdir=false on a directory. This commit adds validation checks for input filenames and passes the LSN extracted from the filename to SnapBuildRestoreSnapshot() instead of the filename itself. It also adds regression tests for various input patterns and permission checks. Bug: #18828 Reported-by: Robins Tharakan <tharakan@gmail.com> Co-authored-by: Bertrand Drouvot <bertranddrouvot.pg@gmail.com> Co-authored-by: Masahiko Sawada <sawada.mshk@gmail.com> Discussion: https://postgr.es/m/18828-0f4701c635064211@postgresql.org
49 lines
2.0 KiB
SQL
49 lines
2.0 KiB
SQL
CREATE EXTENSION pg_logicalinspect;
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-- ===================================================================
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-- Tests for input validation
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-- ===================================================================
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SELECT pg_get_logical_snapshot_info('0-40796E18.foo');
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SELECT pg_get_logical_snapshot_info('0--40796E18.snap');
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SELECT pg_get_logical_snapshot_info('-1--40796E18.snap');
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SELECT pg_get_logical_snapshot_info('0/40796E18.foo.snap');
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SELECT pg_get_logical_snapshot_info('0/40796E18.snap');
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SELECT pg_get_logical_snapshot_info('');
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SELECT pg_get_logical_snapshot_info(NULL);
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SELECT pg_get_logical_snapshot_info('../snapshots');
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SELECT pg_get_logical_snapshot_info('../snapshots/0-40796E18.snap');
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SELECT pg_get_logical_snapshot_meta('0-40796E18.foo');
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SELECT pg_get_logical_snapshot_meta('0-40796E18.foo.snap');
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SELECT pg_get_logical_snapshot_meta('0/40796E18.snap');
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SELECT pg_get_logical_snapshot_meta('');
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SELECT pg_get_logical_snapshot_meta(NULL);
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SELECT pg_get_logical_snapshot_meta('../snapshots');
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-- ===================================================================
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-- Tests for permissions
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-- ===================================================================
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CREATE ROLE regress_pg_logicalinspect;
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SELECT has_function_privilege('regress_pg_logicalinspect',
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'pg_get_logical_snapshot_info(text)', 'EXECUTE'); -- no
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SELECT has_function_privilege('regress_pg_logicalinspect',
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'pg_get_logical_snapshot_meta(text)', 'EXECUTE'); -- no
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-- Functions accessible by users with role pg_read_server_files.
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GRANT pg_read_server_files TO regress_pg_logicalinspect;
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SELECT has_function_privilege('regress_pg_logicalinspect',
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'pg_get_logical_snapshot_info(text)', 'EXECUTE'); -- yes
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SELECT has_function_privilege('regress_pg_logicalinspect',
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'pg_get_logical_snapshot_meta(text)', 'EXECUTE'); -- yes
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-- ===================================================================
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-- Clean up
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-- ===================================================================
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DROP ROLE regress_pg_logicalinspect;
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DROP EXTENSION pg_logicalinspect;
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