default or selected kernelversion does not have config value CONFIG_KMEMCHECK_QUEUE_SIZE.
Result is shown for kernelversion 6.5.1

kmemcheck: error queue size

configname: CONFIG_KMEMCHECK_QUEUE_SIZE

Linux Kernel Configuration
└─>Memory Debugging
└─>kmemcheck: trap use of uninitialized memory
└─>kmemcheck: error queue size
In linux kernel since version 2.6.31 (release Date: 2009-09-09)  
Select the maximum number of errors to store in the queue. Since
errors can occur virtually anywhere and in any context, we need a
temporary storage area which is guarantueed not to generate any
other faults. The queue will be emptied as soon as a tasklet may
be scheduled. If the queue is full, new error reports will be
lost.