mirror of https://github.com/postgres/postgres
Fix out-of-bound read in gtsvector_picksplit()
This could lead to an imprecise choice when splitting an index page of a
GiST index on a tsvector, deciding which entries should remain on the
old page and which entries should move to a new page.
This is wrong since tsearch2 has been moved into core with commit
140d4ebcb4
, so backpatch all the way down. This error has been
spotted by valgrind.
Author: Alexander Lakhin
Discussion: https://postgr.es/m/17950-6c80a8d2b94ec695@postgresql.org
Backpatch-through: 11
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@ -730,7 +730,7 @@ gtsvector_picksplit(PG_FUNCTION_ARGS)
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size_alpha = SIGLENBIT(siglen) -
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sizebitvec((cache[j].allistrue) ?
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GETSIGN(datum_l) :
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GETSIGN(cache[j].sign),
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cache[j].sign,
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siglen);
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}
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else
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@ -744,7 +744,7 @@ gtsvector_picksplit(PG_FUNCTION_ARGS)
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size_beta = SIGLENBIT(siglen) -
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sizebitvec((cache[j].allistrue) ?
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GETSIGN(datum_r) :
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GETSIGN(cache[j].sign),
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cache[j].sign,
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siglen);
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}
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else
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