Thread: pgsql: pgstat: Acquire lock when reading variable-numbered stats
pgstat: Acquire lock when reading variable-numbered stats Somewhere during the development of the patch acquiring a lock during read access to variable-numbered stats got lost. The missing lock acquisition won't cause corruption, but can lead to reading torn values when accessing stats. Add the missing lock acquisitions. Reported-by: Greg Stark <stark@mit.edu> Reviewed-by: "Drouvot, Bertrand" <bdrouvot@amazon.com> Reviewed-by: Andres Freund <andres@anarazel.de> Author: Kyotaro Horiguchi <horikyota.ntt@gmail.com> Discussion: https://postgr.es/m/CAM-w4HMYkM_DkYhWtUGV+qE_rrBxKOzOF0+5faozxO3vXrc9wA@mail.gmail.com Backpatch: 15- Branch ------ REL_15_STABLE Details ------- https://git.postgresql.org/pg/commitdiff/045ec347857b66e8a494b2c12126a6d476702065 Modified Files -------------- src/backend/utils/activity/pgstat.c | 9 +++++++++ src/backend/utils/activity/pgstat_shmem.c | 16 ++++++++++++++++ src/include/utils/pgstat_internal.h | 1 + 3 files changed, 26 insertions(+)