[PATCH] namei fixes (12/19)

In open_namei() we take mntput(nd->mnt);nd->mnt=path.mnt; out of the if
(__follow_mount(...)), making it conditional on nd->mnt != path.mnt instead.

Then we shift the result downstream.

Equivalent transformations.

Signed-off-by: Al Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 9 insertions, 2 deletions

diff --git a/fs/namei.c b/fs/namei.c
index 907a3f2b4c9c..37fcf941fa3f 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1506,8 +1506,6 @@ do_last:
                         mntput(path.mnt);
                         goto exit;
                 }
-                mntput(nd->mnt);
-                nd->mnt = path.mnt;
         }
         error = -ENOENT;
         if (!path.dentry->d_inode)
@@ -1517,6 +1515,9 @@ do_last:
 
         dput(nd->dentry);
         nd->dentry = path.dentry;
+        if (nd->mnt != path.mnt)
+                mntput(nd->mnt);
+        nd->mnt = path.mnt;
         error = -EISDIR;
         if (path.dentry->d_inode && S_ISDIR(path.dentry->d_inode->i_mode))
                 goto exit;
@@ -1528,6 +1529,9 @@ ok:
 
 exit_dput:
         dput(path.dentry);
+        if (nd->mnt != path.mnt)
+                mntput(nd->mnt);
+        nd->mnt = path.mnt;
 exit:
         path_release(nd);
         return error;
@@ -1550,6 +1554,9 @@ do_link:
         error = security_inode_follow_link(path.dentry, nd);
         if (error)
                 goto exit_dput;
+        if (nd->mnt != path.mnt)
+                mntput(nd->mnt);
+        nd->mnt = path.mnt;
         error = __do_follow_link(&path, nd);
         if (error)
                 return error;