Thread: pgsql: Fix overflow danger in SampleHeapTupleVisible(), take 2

Fix overflow danger in SampleHeapTupleVisible(), take 2

28328ec87b45725 addressed one overflow danger in
SampleHeapTupleVisible() but introduced another, albeit a less likely
one. Modify the binary search code to remove this danger.

Reported-by: Richard Guo
Reviewed-by: Richard Guo, Ranier Vilela
Discussion: https://postgr.es/m/CAMbWs4_bE%2BNscChbKWzw6HZOipCUyXfA5133qvoXQ654D3B2gQ%40mail.gmail.com

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/94bb6c4410d81ccc019bb60d8aedb73dbc85df76

Modified Files
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src/backend/access/heap/heapam_handler.c | 16 +++++-----------
1 file changed, 5 insertions(+), 11 deletions(-)