pgbench: avoid FD_ISSET on an invalid file descriptor The original code wasn't careful to test the file descriptor returned by PQsocket() for an invalid socket. If an invalid socket did turn up, that would amount to calling FD_ISSET with fd = -1, whereby undefined behavior can be invoked.
To fix, test file descriptor for validity and stop further processing if that fails. Problem noticed by Coverity. There is an existing FD_ISSET callsite that does check for invalid sockets beforehand, but the error message reported by it was strerror(errno); in testing the aforementioned change, that turns out to result in "bad socket: Success" which isn't terribly helpful. Instead use PQerrorMessage() in both places which is more likely to contain an useful error message. Backpatch-through: 9.1. Branch ------ REL9_2_STABLE Details ------- http://git.postgresql.org/pg/commitdiff/daac53779acdab512e8347ce7472cf0923cd8598 Modified Files -------------- contrib/pgbench/pgbench.c | 20 +++++++++++++++----- 1 file changed, 15 insertions(+), 5 deletions(-) -- Sent via pgsql-committers mailing list ([email protected]) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-committers
