ext4: ext4_chmod now only allows modifying the lowest 12bit of i_mode.

diff --git a/lwext4/ext4.c b/lwext4/ext4.c
index 236cb09e5d4c276fb13bdceae6aba60ed70ea743..38ec6d405118dbc7a0ac6910574d68af7a962c76 100644 (file)
--- a/lwext4/ext4.c
+++ b/lwext4/ext4.c
@@ -1989,7 +1989,7 @@ uint64_t ext4_fsize(ext4_file *f)
 int ext4_chmod(const char *path, uint32_t mode)
 {
        int r;
-       uint32_t ino;
+       uint32_t ino, orig_mode;
        ext4_file f;
        struct ext4_sblock *sb;
        struct ext4_inode_ref inode_ref;
@@ -2017,7 +2017,10 @@ int ext4_chmod(const char *path, uint32_t mode)
                return r;
        }
 
-       ext4_inode_set_mode(sb, inode_ref.inode, mode);
+       orig_mode = ext4_inode_get_mode(sb, inode_ref.inode);
+       orig_mode &= ~0xFFF;
+       orig_mode |= mode & 0xFFF;
+       ext4_inode_set_mode(sb, inode_ref.inode, orig_mode);
        inode_ref.dirty = true;
 
        r = ext4_fs_put_inode_ref(&inode_ref);