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[ Upstream commit8cc27f5c6d] The debugfs_create_str() API assumes that the string pointer is either NULL or points to valid kmalloc() memory. Leaving the pointer uninitialized can cause problems. Initialize src_node and dst_node to empty strings before creating the debugfs entries to guarantee that reads and writes are safe. Fixes:770c69f037("interconnect: Add debugfs test client") Signed-off-by: Georgi Djakov <djakov@kernel.org> Reviewed-by: Kuan-Wei Chiu <visitorckw@gmail.com> Tested-by: Kuan-Wei Chiu <visitorckw@gmail.com> Link: https://lore.kernel.org/r/20260109122523.125843-1-djakov@kernel.org Signed-off-by: Georgi Djakov <djakov@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>