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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2023-04-29 13:06:44 -0400 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2023-04-29 13:06:44 -0400 |
| commit | ee24b5e792e091b216db20b765d1dcb718abfdfc (patch) | |
| tree | b327bd330ce17fa96d41c6d484d2df5676e746e2 /src/tutorial | |
| parent | 7dcd9998c19d7e1a86bc0d76167e429455e3db5f (diff) | |
| download | postgresql-ee24b5e792e091b216db20b765d1dcb718abfdfc.tar.gz postgresql-ee24b5e792e091b216db20b765d1dcb718abfdfc.zip | |
Tighten array dimensionality checks in Perl -> SQL array conversion.
plperl_array_to_datum() wasn't sufficiently careful about checking
that nested lists represent a rectangular array structure; it would
accept inputs such as "[1, []]". This is a bit related to the
PL/Python bug fixed in commit 81eaaf65e, but it doesn't seem to
provide any direct route to a memory stomp. Instead the likely
failure mode is for makeMdArrayResult to be passed fewer Datums than
the claimed array dimensionality requires, possibly leading to a wild
pointer dereference and SIGSEGV.
Per report from Alexander Lakhin. It's been broken for a long
time, so back-patch to all supported branches.
Discussion: https://postgr.es/m/5ebae5e4-d401-fadf-8585-ac3eaf53219c@gmail.com
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