Submitted by: Claudio Valderrama C. (robocop)

Assigned to: Claudio Valderrama C. (robocop)

SFID: 1030572#⁠
Submitted By: robocop

The functions IB_UDF_lpad and IB_UDF_rpad declared in
ib_udf.sql as lpad and rpad respectively will enter an
infinite loop if the last parameter (pad char) is ''
(empty string, two consecutive single quotes) or NULL
(interpreted as an empty string), making the owner
process (fbserver) consume 100% CPU. Despite the udf is
in an endless loop, if the server runs as an
application, it's possible to shutdown it from the tray.

The cause is flawed logic in the code of the two
external functions.