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In get_perl_array_ref(), for a PostgreSQL::InServer::ARRAY object, we look up its "array" key with hv_fetch_string() and then inspect the returned SV. However, hv_fetch_string() returns a NULL pointer when the key is absent, and the code dereferenced that result without first checking whether the pointer itself was NULL. As a result, a plperl function returning a forged PostgreSQL::InServer::ARRAY object that lacks the "array" key would crash the backend with a segmentation fault. Fix this by checking the pointer returned by hv_fetch_string() before dereferencing it, matching how other callers in this file already guard the result. With the check in place, such an object falls through to the existing error report instead of crashing. Author: Xing Guo <higuoxing@gmail.com> Reviewed-by: Richard Guo <guofenglinux@gmail.com> Discussion: https://postgr.es/m/CACpMh+DYgcnqZwQLXXuxQcehJTd7T8UmKWSLsK4mFBEp9G2ajA@mail.gmail.com Backpatch-through: 14 |
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| .. | ||
| expected | ||
| po | ||
| sql | ||
| .gitignore | ||
| GNUmakefile | ||
| meson.build | ||
| nls.mk | ||
| plc_perlboot.pl | ||
| plc_trusted.pl | ||
| plperl--1.0.sql | ||
| plperl.c | ||
| plperl.control | ||
| plperl.h | ||
| plperl_opmask.pl | ||
| plperl_system.h | ||
| plperlu--1.0.sql | ||
| plperlu.control | ||
| ppport.h | ||
| README | ||
| SPI.xs | ||
| text2macro.pl | ||
| Util.xs | ||
src/pl/plperl/README PL/Perl allows you to write PostgreSQL functions and procedures in Perl. To include PL/Perl in the build use './configure --with-perl'. To build from this directory use 'make all; make install'. libperl must have been built as a shared library, which is usually not the case in standard installations. Consult the PostgreSQL User's Guide for more information.