postgres.git / summary / log / commit / refs
commit 419bd6371d557f5aa687e56ebe04e4946db0b8a4
Author: Michael Paquier <michael@paquier.xyz>
Date: Mon Dec 17 03:43:57 2018 +0000
Fix use-after-free bug when renaming constraints
This is an oversight from recent commit b13fd344. While on it, tweak
the previous test with a better name for the renamed primary key.
Detected by buildfarm member prion which forces relation cache release
with -DRELCACHE_FORCE_RELEASE. Back-patch down to 9.4 as the previous
commit.
src/backend/commands/tablecmds.c | 4 ++--
src/test/regress/expected/alter_table.out | 2 +-
src/test/regress/sql/alter_table.sql | 2 +-
3 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/src/backend/commands/tablecmds.c b/src/backend/commands/tablecmds.c
index 0747f90c341..7a30da5d0db 100644
--- a/src/backend/commands/tablecmds.c
+++ b/src/backend/commands/tablecmds.c
@@ -2495,12 +2495,12 @@ rename_constraint_internal(Oid myrelid,
if (targetrelation)
{
- relation_close(targetrelation, NoLock); /* close rel but keep lock */
-
/*
* Invalidate relcache so as others can see the new constraint name.
*/
CacheInvalidateRelcache(targetrelation);
+
+ relation_close(targetrelation, NoLock); /* close rel but keep lock */
}
return address;
diff --git a/src/test/regress/expected/alter_table.out b/src/test/regress/expected/alter_table.out
index b860caadf63..b5c4e82410c 100644
--- a/src/test/regress/expected/alter_table.out
+++ b/src/test/regress/expected/alter_table.out
@@ -349,7 +349,7 @@ CREATE TABLE constraint_rename_cache (a int,
ALTER TABLE constraint_rename_cache
RENAME CONSTRAINT chk_a TO chk_a_new;
ALTER TABLE constraint_rename_cache
- RENAME CONSTRAINT constraint_rename_cache_pkey TO chk_a_gt_zero;
+ RENAME CONSTRAINT constraint_rename_cache_pkey TO constraint_rename_pkey_new;
CREATE TABLE like_constraint_rename_cache
(LIKE constraint_rename_cache INCLUDING ALL);
\d like_constraint_rename_cache
diff --git a/src/test/regress/sql/alter_table.sql b/src/test/regress/sql/alter_table.sql
index 522e96c0119..fdc300d6b72 100644
--- a/src/test/regress/sql/alter_table.sql
+++ b/src/test/regress/sql/alter_table.sql
@@ -258,7 +258,7 @@ CREATE TABLE constraint_rename_cache (a int,
ALTER TABLE constraint_rename_cache
RENAME CONSTRAINT chk_a TO chk_a_new;
ALTER TABLE constraint_rename_cache
- RENAME CONSTRAINT constraint_rename_cache_pkey TO chk_a_gt_zero;
+ RENAME CONSTRAINT constraint_rename_cache_pkey TO constraint_rename_pkey_new;
CREATE TABLE like_constraint_rename_cache
(LIKE constraint_rename_cache INCLUDING ALL);
\d like_constraint_rename_cache
[parent: d79cd555da11]