Merge #731

731: don't leak memory if the environment is empty r=stlankes a=stlankes



Co-authored-by: Stefan Lankes <slankes@eonerc.rwth-aachen.de>

src/arch/x86_64/kernel/processor.rs

@@ -288,6 +288,7 @@ impl CpuFrequency {
 			source: CpuFrequencySources::Invalid,
 		}
 	}
+
 	fn set_detected_cpu_frequency(
 		&mut self,
 		mhz: u16,

src/syscalls/interfaces/mod.rs

@@ -41,7 +41,12 @@ pub trait SyscallInterface: Send + Sync {
 
 		let argc = argv.len() as i32;
 		let argv = argv.leak().as_ptr();
-		let envv = envv.leak().as_ptr();
+		// do we have more than a end marker? If not, return as null pointer
+		let envv = if envv.len() == 1 {
+			core::ptr::null::<*const u8>()
+		} else {
+			envv.leak().as_ptr()
+		};
 
 		(argc, argv, envv)
 	}