Thread: pgsql: Avoid crash in rare case of concurrent DROP
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 Branch ------ REL_12_STABLE Details ------- https://git.postgresql.org/pg/commitdiff/3eff168a29ca6d737611e8608504537d4ff18d50 Modified Files -------------- src/backend/catalog/dependency.c | 31 ++++++++++++++++++++----------- src/backend/catalog/pg_shdepend.c | 6 ++++++ 2 files changed, 26 insertions(+), 11 deletions(-)