mirror of
https://git.postgresql.org/git/postgresql.git
synced 2026-02-15 19:06:59 +08:00
0f08df4068
Consistently prevent nbtree array advancement from treating a scankey as required when operating in pstate.forcenonrequired mode. Otherwise, we risk a NULL pointer dereference. This was possible in the path where _bt_check_compare is called to recheck a tuple that advanced all of the scan's arrays to matching values: its continuescan=false handling expects _bt_advance_array_keys to have been called with a valid pstate, but it'll always be NULL during sktrig_required=false calls (which is how _bt_advance_array_keys must be called when pstate.forcenonrequired). Oversight in commit 8a510275, which optimized nbtree search scan key comparisons. Author: Peter Geoghegan <pg@bowt.ie> Reported-By: Mark Dilger <mark.dilger@enterprisedb.com> Discussion: https://postgr.es/m/CAHgHdKsn2W=gPBmj7p6MjQFvxB+zZDBkwTSg0o3f5Hh8rkRrsA@mail.gmail.com Discussion: https://postgr.es/m/CAH2-WzmodSE+gpTd1CRGU9ez8ytyyDS+Kns2r9NzgUp1s56kpw@mail.gmail.com