Index: qemu/linux-user/syscall.c
===================================================================
--- qemu.orig/linux-user/syscall.c	2007-09-17 01:06:41.000000000 -0400
+++ qemu/linux-user/syscall.c	2007-09-17 01:09:25.000000000 -0400
@@ -2462,7 +2462,7 @@
 long do_syscall(void *cpu_env, int num, long arg1, long arg2, long arg3,
                 long arg4, long arg5, long arg6)
 {
-    long ret;
+    long ret = 0;
     struct stat st;
     struct statfs stfs;
     void *p;
@@ -3352,25 +3352,25 @@
 #endif
     case TARGET_NR_statfs:
         p = lock_user_string(arg1);
+        if( !access_ok(VERIFY_READ,p,1) ) return -EFAULT;
         ret = get_errno(statfs(path(p), &stfs));
         unlock_user(p, arg1, 0);
     convert_statfs:
         if (!is_error(ret)) {
-            struct target_statfs *target_stfs;
+            struct target_statfs *target_stfs = (struct target_statfs *)arg2;;
            
-            lock_user_struct(target_stfs, arg2, 0);
-            /* ??? put_user is probably wrong.  */
-            put_user(stfs.f_type, &target_stfs->f_type);
-            put_user(stfs.f_bsize, &target_stfs->f_bsize);
-            put_user(stfs.f_blocks, &target_stfs->f_blocks);
-            put_user(stfs.f_bfree, &target_stfs->f_bfree);
-            put_user(stfs.f_bavail, &target_stfs->f_bavail);
-            put_user(stfs.f_files, &target_stfs->f_files);
-            put_user(stfs.f_ffree, &target_stfs->f_ffree);
-            put_user(stfs.f_fsid.__val[0], &target_stfs->f_fsid.val[0]);
-            put_user(stfs.f_fsid.__val[1], &target_stfs->f_fsid.val[1]);
-            put_user(stfs.f_namelen, &target_stfs->f_namelen);
-            unlock_user_struct(target_stfs, arg2, 1);
+            if( !access_ok(VERIFY_WRITE,target_stfs,sizeof(struct target_statfs)) ) return -EFAULT;
+            /* use __put_user since we just validated the entire bufffer.  */
+            __put_user(stfs.f_type, &target_stfs->f_type);
+            __put_user(stfs.f_bsize, &target_stfs->f_bsize);
+            __put_user(stfs.f_blocks, &target_stfs->f_blocks);
+            __put_user(stfs.f_bfree, &target_stfs->f_bfree);
+            __put_user(stfs.f_bavail, &target_stfs->f_bavail);
+            __put_user(stfs.f_files, &target_stfs->f_files);
+            __put_user(stfs.f_ffree, &target_stfs->f_ffree);
+            __put_user(stfs.f_fsid.__val[0], &target_stfs->f_fsid.val[0]);
+            __put_user(stfs.f_fsid.__val[1], &target_stfs->f_fsid.val[1]);
+            __put_user(stfs.f_namelen, &target_stfs->f_namelen);
         }
         break;
     case TARGET_NR_fstatfs:
@@ -3379,25 +3379,25 @@
 #ifdef TARGET_NR_statfs64
     case TARGET_NR_statfs64:
         p = lock_user_string(arg1);
+        if( !access_ok(VERIFY_READ,p,1) ) return -EFAULT;
         ret = get_errno(statfs(path(p), &stfs));
         unlock_user(p, arg1, 0);
     convert_statfs64:
         if (!is_error(ret)) {
-            struct target_statfs64 *target_stfs;
+            struct target_statfs64 *target_stfs = (struct target_statfs64 *)arg3;
            
-            lock_user_struct(target_stfs, arg3, 0);
-            /* ??? put_user is probably wrong.  */
-            put_user(stfs.f_type, &target_stfs->f_type);
-            put_user(stfs.f_bsize, &target_stfs->f_bsize);
-            put_user(stfs.f_blocks, &target_stfs->f_blocks);
-            put_user(stfs.f_bfree, &target_stfs->f_bfree);
-            put_user(stfs.f_bavail, &target_stfs->f_bavail);
-            put_user(stfs.f_files, &target_stfs->f_files);
-            put_user(stfs.f_ffree, &target_stfs->f_ffree);
-            put_user(stfs.f_fsid.__val[0], &target_stfs->f_fsid.val[0]);
-            put_user(stfs.f_fsid.__val[1], &target_stfs->f_fsid.val[1]);
-            put_user(stfs.f_namelen, &target_stfs->f_namelen);
-            unlock_user_struct(target_stfs, arg3, 0);
+            if( !access_ok(VERIFY_WRITE,target_stfs,sizeof(struct target_statfs64)) ) return -EFAULT;
+            /* use __put_user since we just validated the entire bufffer.  */
+            __put_user(stfs.f_type, &target_stfs->f_type);
+            __put_user(stfs.f_bsize, &target_stfs->f_bsize);
+            __put_user(stfs.f_blocks, &target_stfs->f_blocks);
+            __put_user(stfs.f_bfree, &target_stfs->f_bfree);
+            __put_user(stfs.f_bavail, &target_stfs->f_bavail);
+            __put_user(stfs.f_files, &target_stfs->f_files);
+            __put_user(stfs.f_ffree, &target_stfs->f_ffree);
+            __put_user(stfs.f_fsid.__val[0], &target_stfs->f_fsid.val[0]);
+            __put_user(stfs.f_fsid.__val[1], &target_stfs->f_fsid.val[1]);
+            __put_user(stfs.f_namelen, &target_stfs->f_namelen);
         }
         break;
     case TARGET_NR_fstatfs64:
@@ -4126,53 +4126,51 @@
             if (!is_error(ret)) {
 #ifdef TARGET_ARM
                 if (((CPUARMState *)cpu_env)->eabi) {
-                    struct target_eabi_stat64 *target_st;
-                    lock_user_struct(target_st, arg2, 1);
+                    struct target_eabi_stat64 *target_st = (struct target_eabi_stat64 *)arg2;
+		    if( !access_ok(VERIFY_WRITE,target_st,sizeof(struct target_eabi_stat64)) ) return -EFAULT;
                     memset(target_st, 0, sizeof(struct target_eabi_stat64));
-                    /* put_user is probably wrong.  */
-                    put_user(st.st_dev, &target_st->st_dev);
-                    put_user(st.st_ino, &target_st->st_ino);
+                    /* use __put_user() since we just checked that the buffer is valid  */
+                    __put_user(st.st_dev, &target_st->st_dev);
+                    __put_user(st.st_ino, &target_st->st_ino);
 #ifdef TARGET_STAT64_HAS_BROKEN_ST_INO
-                    put_user(st.st_ino, &target_st->__st_ino);
+                    __put_user(st.st_ino, &target_st->__st_ino);
 #endif
-                    put_user(st.st_mode, &target_st->st_mode);
-                    put_user(st.st_nlink, &target_st->st_nlink);
-                    put_user(st.st_uid, &target_st->st_uid);
-                    put_user(st.st_gid, &target_st->st_gid);
-                    put_user(st.st_rdev, &target_st->st_rdev);
+                    __put_user(st.st_mode, &target_st->st_mode);
+                    __put_user(st.st_nlink, &target_st->st_nlink);
+                    __put_user(st.st_uid, &target_st->st_uid);
+                    __put_user(st.st_gid, &target_st->st_gid);
+                    __put_user(st.st_rdev, &target_st->st_rdev);
                     /* XXX: better use of kernel struct */
-                    put_user(st.st_size, &target_st->st_size);
-                    put_user(st.st_blksize, &target_st->st_blksize);
-                    put_user(st.st_blocks, &target_st->st_blocks);
-                    put_user(st.st_atime, &target_st->target_st_atime);
-                    put_user(st.st_mtime, &target_st->target_st_mtime);
-                    put_user(st.st_ctime, &target_st->target_st_ctime);
-                    unlock_user_struct(target_st, arg2, 0);
+                    __put_user(st.st_size, &target_st->st_size);
+                    __put_user(st.st_blksize, &target_st->st_blksize);
+                    __put_user(st.st_blocks, &target_st->st_blocks);
+                    __put_user(st.st_atime, &target_st->target_st_atime);
+                    __put_user(st.st_mtime, &target_st->target_st_mtime);
+                    __put_user(st.st_ctime, &target_st->target_st_ctime);
                 } else
 #endif
                 {
-                    struct target_stat64 *target_st;
-                    lock_user_struct(target_st, arg2, 1);
+                    struct target_stat64 *target_st = (struct target_stat64 *)arg2;
+		    if( !access_ok(VERIFY_WRITE,target_st,sizeof(struct target_stat64)) ) return -EFAULT;
                     memset(target_st, 0, sizeof(struct target_stat64));
-                    /* ??? put_user is probably wrong.  */
-                    put_user(st.st_dev, &target_st->st_dev);
-                    put_user(st.st_ino, &target_st->st_ino);
+                    /* use __put_user() since we just checked that the buffer is valid  */
+                    __put_user(st.st_dev, &target_st->st_dev);
+                    __put_user(st.st_ino, &target_st->st_ino);
 #ifdef TARGET_STAT64_HAS_BROKEN_ST_INO
-                    put_user(st.st_ino, &target_st->__st_ino);
+                    __put_user(st.st_ino, &target_st->__st_ino);
 #endif
-                    put_user(st.st_mode, &target_st->st_mode);
-                    put_user(st.st_nlink, &target_st->st_nlink);
-                    put_user(st.st_uid, &target_st->st_uid);
-                    put_user(st.st_gid, &target_st->st_gid);
-                    put_user(st.st_rdev, &target_st->st_rdev);
+                    __put_user(st.st_mode, &target_st->st_mode);
+                    __put_user(st.st_nlink, &target_st->st_nlink);
+                    __put_user(st.st_uid, &target_st->st_uid);
+                    __put_user(st.st_gid, &target_st->st_gid);
+                    __put_user(st.st_rdev, &target_st->st_rdev);
                     /* XXX: better use of kernel struct */
-                    put_user(st.st_size, &target_st->st_size);
-                    put_user(st.st_blksize, &target_st->st_blksize);
-                    put_user(st.st_blocks, &target_st->st_blocks);
-                    put_user(st.st_atime, &target_st->target_st_atime);
-                    put_user(st.st_mtime, &target_st->target_st_mtime);
-                    put_user(st.st_ctime, &target_st->target_st_ctime);
-                    unlock_user_struct(target_st, arg2, 0);
+                    __put_user(st.st_size, &target_st->st_size);
+                    __put_user(st.st_blksize, &target_st->st_blksize);
+                    __put_user(st.st_blocks, &target_st->st_blocks);
+                    __put_user(st.st_atime, &target_st->target_st_atime);
+                    __put_user(st.st_mtime, &target_st->target_st_mtime);
+                    __put_user(st.st_ctime, &target_st->target_st_ctime);
                 }
             }
         }