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_15_STABLE
Details
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https://git.postgresql.org/pg/commitdiff/00ac61695e5c7d573b14bb7a61387a3fae017928
Modified Files
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src/backend/parser/parse_clause.c | 3 +++
1 file changed, 3 insertions(+)