| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | pgsql-committers(at)postgresql(dot)org |
| Subject: | pgsql: Fix VM buffer pin management in heap_lock_updated_tuple_rec(). |
| Date: | 2018-03-02 22:41:00 |
| Message-ID: | E1ertMK-0001qC-37@gemulon.postgresql.org |
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| Lists: | pgsql-committers |
Fix VM buffer pin management in heap_lock_updated_tuple_rec().
Sloppy coding in this function could lead to leaking a VM buffer pin,
or to attempting to free the same pin twice. Repair. While at it,
reduce the code's tendency to free and reacquire the same page pin.
Back-patch to 9.6; before that, this routine did not concern itself
with VM pages.
Amit Kapila and Tom Lane
Discussion: https://postgr.es/m/CAA4eK1KJKwhc=isgTQHjM76CAdVswzNeAuZkh_cx-6QgGkSEgA@mail.gmail.com
Branch
------
REL_10_STABLE
Details
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https://git.postgresql.org/pg/commitdiff/76ec45756644e5d46301ee292f8f951f9f835fae
Modified Files
--------------
src/backend/access/heap/heapam.c | 24 ++++++++++++++++--------
1 file changed, 16 insertions(+), 8 deletions(-)
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