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Check criticalSharedRelcachesBuilt in GetSharedSecurityLabel().

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An extension may want to call GetSecurityLabel() on a shared object
before the shared relcaches are fully initialized. For instance, a
ClientAuthentication_hook might want to retrieve the security label on
a role.

Discussion: https://postgr.es/m/ecb7af0b26e3be1d96d291c8453a86f1f82d9061.camel@j-davis.com
Backpatch-through: 9.6
This commit is contained in:
Jeff Davis
2021-10-14 12:25:30 -07:00
parent 6287b8e195
commit 3f5d481ef5
1 changed files with 2 additions and 2 deletions
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4
src/backend/commands/seclabel.c
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@ -169,8 +169,8 @@ GetSharedSecurityLabel(const ObjectAddress *object, const char *provider)
pg_shseclabel = heap_open(SharedSecLabelRelationId, AccessShareLock); pg_shseclabel = heap_open(SharedSecLabelRelationId, AccessShareLock);
scan = systable_beginscan(pg_shseclabel, SharedSecLabelObjectIndexId, true, scan = systable_beginscan(pg_shseclabel, SharedSecLabelObjectIndexId,
NULL, 3, keys); criticalSharedRelcachesBuilt, NULL, 3, keys);
tuple = systable_getnext(scan); tuple = systable_getnext(scan);
if (HeapTupleIsValid(tuple)) if (HeapTupleIsValid(tuple))