Be more wary about partially-valid LOCALLOCK data in RemoveLocalLock().
RemoveLocalLock() must consider the possibility that LockAcquireExtended()
failed to palloc the initial space for a locallock's lockOwners array.
I had evidently meant to cope with this hazard when the code was originally
written (commit 1785acebf2ed14fd66955e2d9a55d77a025f418d), but missed that
the pfree needed to be protected with an if-test. Just to make sure things
are left in a clean state, reset numLockOwners as well.
Per low-memory testing by Andreas Seltenreich. Back-patch to all supported
branches.
Branch
------
REL9_4_STABLE
Details
-------
http://git.postgresql.org/pg/commitdiff/e32c5f118ec2da80fd76da1241dd721ceb3e9127
Modified Files
--------------
src/backend/storage/lmgr/lock.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)