]> git.ipfire.org Git - thirdparty/postgresql.git/commit
Avoid crash in rare case of concurrent DROP
authorAlvaro Herrera <alvherre@alvh.no-ip.org>
Fri, 5 Nov 2021 15:29:34 +0000 (12:29 -0300)
committerAlvaro Herrera <alvherre@alvh.no-ip.org>
Fri, 5 Nov 2021 15:29:34 +0000 (12:29 -0300)
commit58b600f64bfb80ca6daf6d9f27af9c3105e13500
tree1410af9793ae5fb2f2147b4723ddd48d8fac56ea
parent245799d39c378b03021304c69cae9dd79f0937e3
Avoid crash in rare case of concurrent DROP

When a role being dropped contains is referenced by catalog objects that
are concurrently also being dropped, a crash can result while trying to
construct the string that describes the objects.  Suppress that by
ignoring objects whose descriptions are returned as NULL.

The majority of relevant codesites were already cautious about this
already; we had just missed a couple.

This is an old bug, so backpatch all the way back.

Reported-by: Alexander Lakhin <exclusion@gmail.com>
Discussion: https://postgr.es/m/17126-21887f04508cb5c8@postgresql.org
src/backend/catalog/dependency.c
src/backend/catalog/pg_shdepend.c