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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2021-10-06 15:50:24 -0400 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2021-10-06 15:50:24 -0400 |
| commit | 12ff678e1d657fc94a1cfa90f1b85dd9bd79e1e6 (patch) | |
| tree | 215080ea04ef91217e0a906bfea21b13f7ae4e32 /src/tutorial/complex.c | |
| parent | 8e26b868d5cfe9c746578aa3b172b6f24a5a310c (diff) | |
| download | postgresql-12ff678e1d657fc94a1cfa90f1b85dd9bd79e1e6.tar.gz postgresql-12ff678e1d657fc94a1cfa90f1b85dd9bd79e1e6.zip | |
Fix null-pointer crash in postgres_fdw's conversion_error_callback.
Commit c7b7311f6 adjusted conversion_error_callback to always use
information from the query's rangetable, to avoid doing catalog lookups
in an already-failed transaction. However, as a result of the utterly
inadequate documentation for make_tuple_from_result_row, I failed to
realize that fsstate could be NULL in some contexts. That led to a
crash if we got a conversion error in such a context. Fix by falling
back to the previous coding when fsstate is NULL. Improve the
commentary, too.
Per report from Andrey Borodin. Back-patch to 9.6, like the previous
patch.
Discussion: https://postgr.es/m/08916396-55E4-4D68-AB3A-BD6066F9E5C0@yandex-team.ru
Diffstat (limited to 'src/tutorial/complex.c')
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