Apply the LCONVPATH() to the (old) linux_stat() and linux_lstat() syscalls.

Without it, code has two problems:
- behaviour of the old and new [l]stat are different with regard of
  the /compat/linux
- directly accessing the userspace data from the kernel asks for
  the panics.

Reported and tested by:	Peter Holm
Reviewed by:	rdivacky
MFC after:	3 days

1 files changed, 12 insertions, 3 deletions

diff --git a/sys/compat/linux/linux_stats.c b/sys/compat/linux/linux_stats.c
index 4dd9419..048a401 100644
--- a/sys/compat/linux/linux_stats.c
+++ b/sys/compat/linux/linux_stats.c
@@ -263,12 +263,17 @@ int
 linux_stat(struct thread *td, struct linux_stat_args *args)
 {
 	struct stat buf;
+	char *path;
 	int error;
+
+	LCONVPATHEXIST(td, args->path, &path);
+
 #ifdef DEBUG
 	if (ldebug(stat))
-	printf(ARGS(stat, "%s, *"), args->path);
+		printf(ARGS(stat, "%s, *"), args->path);
 #endif
-	error = kern_stat(td, args->path, UIO_SYSSPACE, &buf);
+	error = kern_stat(td, path, UIO_SYSSPACE, &buf);
+	LFREEPATH(path);
 	if (error)
 		return (error);
 	translate_path_major_minor(td, args->path, &buf);
@@ -279,13 +284,17 @@ int
 linux_lstat(struct thread *td, struct linux_lstat_args *args)
 {
 	struct stat buf;
+	char *path;
 	int error;
 
+	LCONVPATHEXIST(td, args->path, &path);
+
 #ifdef DEBUG
 	if (ldebug(lstat))
-	printf(ARGS(lstat, "%s, *"), args->path);
+		printf(ARGS(lstat, "%s, *"), args->path);
 #endif
 	error = kern_lstat(td, args->path, UIO_SYSSPACE, &buf);
+	LFREEPATH(path);
 	if (error)
 		return (error);
 	translate_path_major_minor(td, args->path, &buf);