Merge PR #29316 into master

* refs/pull/29316/head:
	common,tools: make sure the destination buffer can handle the size of the string
	src/tools: initialize variables before the goto statement
	src/mount: check before dereference buf
	src/crush: check before dereference out2
	src/test: s/strcpy/strncpy

Reviewed-by: Neha Ojha <nojha@redhat.com>
Reviewed-by: Kefu Chai <kchai@redhat.com>