Catch stack overflow when recursing in transformFromClauseItem().
Most parts of the parser can expect that the stack overflow check
in transformExprRecurse() will trigger before things get desperate.
However, transformFromClauseItem() can recurse directly to self
without having analyzed any expressions, so it's possible to drive
it to a stack-overrun crash. Add a check to prevent that.
Per bug #17583 from Egor Chindyaskin. Back-patch to all supported
branches.
Richard Guo
Discussion: https://postgr.es/m/17583-33be55b9f981f75c@postgresql.org
Branch
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REL_12_STABLE
Details
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https://git.postgresql.org/pg/commitdiff/ba516fb0715c75b1b2d393c3de7b99fca6a1ac67
Modified Files
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src/backend/parser/parse_clause.c | 3 +++
1 file changed, 3 insertions(+)