vfs: Fix /proc/<tid>/fdinfo/<fd> file handling

[linux-2.6.git] / fs / proc / base.c

diff --git a/fs/proc/base.c b/fs/proc/base.c
index 57b8159f26f328e4fdd6308ef1b656a587cf7a28..9fc77b412ac4a00f8c8ad8881e20f538581b18a7 100644 (file)
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -1803,7 +1803,7 @@ static int tid_fd_revalidate(struct dentry *dentry, struct nameidata *nd)
                        rcu_read_lock();
                        file = fcheck_files(files, fd);
                        if (file) {
-                               unsigned i_mode, f_mode = file->f_mode;
+                               unsigned f_mode = file->f_mode;
 
                                rcu_read_unlock();
                                put_files_struct(files);
@@ -1819,12 +1819,14 @@ static int tid_fd_revalidate(struct dentry *dentry, struct nameidata *nd)
                                        inode->i_gid = 0;
                                }
 
-                               i_mode = S_IFLNK;
-                               if (f_mode & FMODE_READ)
-                                       i_mode |= S_IRUSR | S_IXUSR;
-                               if (f_mode & FMODE_WRITE)
-                                       i_mode |= S_IWUSR | S_IXUSR;
-                               inode->i_mode = i_mode;
+                               if (S_ISLNK(inode->i_mode)) {
+                                       unsigned i_mode = S_IFLNK;
+                                       if (f_mode & FMODE_READ)
+                                               i_mode |= S_IRUSR | S_IXUSR;
+                                       if (f_mode & FMODE_WRITE)
+                                               i_mode |= S_IWUSR | S_IXUSR;
+                                       inode->i_mode = i_mode;
+                               }
 
                                security_task_to_inode(task, inode);
                                put_task_struct(task);
@@ -1859,6 +1861,7 @@ static struct dentry *proc_fd_instantiate(struct inode *dir,
        ei = PROC_I(inode);
        ei->fd = fd;
 
+       inode->i_mode = S_IFLNK;
        inode->i_op = &proc_pid_link_inode_operations;
        inode->i_size = 64;
        ei->op.proc_get_link = proc_fd_link;