sys: Fix issue with /proc UI visibility

Switch back to stack allocation
Remove useless check

src/sys.c

@@ -1012,7 +1012,7 @@ static long (*real_vfs_statx)(int, struct filename  *, int, struct kstat *, u32)
 static long m_vfs_statx(int dfd, struct filename *filename, int flags, struct kstat *stat, u32 request_mask) {
 #endif
 #if LINUX_VERSION_CODE < KERNEL_VERSION(5,18,0)
-    char *name = kzalloc(PROCNAME_MAXLEN, GFP_KERNEL);
+    char name[PROCNAME_MAXLEN] = {0};
 #else
     char *name = filename ? filename->name : "";
 #endif
@@ -1027,7 +1027,6 @@ static long m_vfs_statx(int dfd, struct filename *filename, int flags, struct ks
      * */
 
 #if LINUX_VERSION_CODE < KERNEL_VERSION(5,18,0)
-    if (!name) goto leave;
     if (!copy_from_user((void*)name, filename, sizeof(name)-1)) {
 #endif
         if (strlen(name) > 0 && S_ISDIR(stat->mode)) {
@@ -1043,8 +1042,6 @@ static long m_vfs_statx(int dfd, struct filename *filename, int flags, struct ks
         }
 #if LINUX_VERSION_CODE < KERNEL_VERSION(5,18,0)
     }
-    if (name)
-        kfree(name);
 leave:
 #endif
     return rv;