Thread: pgsql: Fix some possible low-memory failures in regexp compilation.

Fix some possible low-memory failures in regexp compilation.

newnfa() failed to set the regex error state when malloc() fails.
Several places in regcomp.c failed to check for an error after calling
subre().  Each of these mistakes could lead to null-pointer-dereference
crashes in memory-starved backends.

Report and patch by Andreas Seltenreich.  Back-patch to all branches.

Branch
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REL9_0_STABLE

Details
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http://git.postgresql.org/pg/commitdiff/7e23b63bd8e0776f90c915d72fced4215eefadb0

Modified Files
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src/backend/regex/regc_nfa.c |    3 +++
src/backend/regex/regcomp.c  |    3 +++
2 files changed, 6 insertions(+)