chdir: Fix SMAP violation

Dennisbonke · Dennisbonke · commit ca372f3f4802 · 2022-03-28T00:01:17.000+02:00
Signed-off-by: Dennis Bonke &lt;admin@dennisbonke.com&gt;
diff --git a/src/aero_kernel/src/syscall/fs.rs b/src/aero_kernel/src/syscall/fs.rs
@@ -138,7 +138,7 @@ pub fn close(fd: usize) -> Result<usize, AeroSyscallError> {
 }
 
 pub fn chdir(path: usize, size: usize) -> Result<usize, AeroSyscallError> {
-    let buffer = validate_str(path as *mut u8, size).ok_or(AeroSyscallError::EINVAL)?;
+    let buffer = controlregs::with_userspace_access(||validate_str(path as *mut u8, size).ok_or(AeroSyscallError::EINVAL))?;
     let inode = fs::lookup_path(Path::new(buffer))?;
 
     if !inode.inode().metadata()?.is_directory() {

Original file line number	Diff line number	Diff line change
`@@ -138,7 +138,7 @@ pub fn close(fd: usize) -> Result<usize, AeroSyscallError> {`
`138`	`138`	`}`
`139`	`139`
`140`	`140`	`pub fn chdir(path: usize, size: usize) -> Result<usize, AeroSyscallError> {`
`141`		`- let buffer = validate_str(path as *mut u8, size).ok_or(AeroSyscallError::EINVAL)?;`
	`141`	`+ let buffer = controlregs::with_userspace_access(\|\|validate_str(path as *mut u8, size).ok_or(AeroSyscallError::EINVAL))?;`
`142`	`142`	`let inode = fs::lookup_path(Path::new(buffer))?;`
`143`	`143`
`144`	`144`	`if !inode.inode().metadata()?.is_directory() {`