Messages in this thread Patch in this message | | | Date | Mon, 16 Sep 2013 15:34:22 +0200 | From | Miklos Szeredi <> | Subject | Re: [PATCH 07/11] gfs2: pass correct dentry to finish_open() in __gfs2_lookup() |
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On Mon, Sep 16, 2013 at 02:13:14PM +0100, Steven Whitehouse wrote: > Hi, > > On Mon, 2013-09-16 at 14:52 +0200, Miklos Szeredi wrote: > > From: Miklos Szeredi <mszeredi@suse.cz> > > > > AFAICS if d_splice_alias() returned non-NULL, this code would Oops > > (finish_open expects an instantiated dentry). > > > > Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> > > Cc: Steven Whitehouse <swhiteho@redhat.com> > > Cc: stable@vger.kernel.org > > --- > > fs/gfs2/inode.c | 2 +- > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c > > index 6d7f976..abe7dae 100644 > > --- a/fs/gfs2/inode.c > > +++ b/fs/gfs2/inode.c > > @@ -774,7 +774,7 @@ static struct dentry *__gfs2_lookup(struct inode *dir, struct dentry *dentry, > > > > d = d_splice_alias(inode, dentry); > > if (file && S_ISREG(inode->i_mode)) > > - error = finish_open(file, dentry, gfs2_open_common, opened); > > + error = finish_open(file, d ? d : dentry, gfs2_open_common, opened); > > > > gfs2_glock_dq_uninit(&gh); > > if (error) > > Not sure I understand why this is required... when the inode is a > regular file, d can only be an error (if the inode is an error) or it > will be NULL.
Okay, you're right. Still, something like the following should make this clear and ensure things don't break in the future.
Thanks, Miklos
--- fs/gfs2/inode.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
--- a/fs/gfs2/inode.c +++ b/fs/gfs2/inode.c @@ -775,8 +775,10 @@ static struct dentry *__gfs2_lookup(stru } d = d_splice_alias(inode, dentry); - if (file && S_ISREG(inode->i_mode)) + if (file && S_ISREG(inode->i_mode)) { + BUG_ON(d); error = finish_open(file, dentry, gfs2_open_common, opened); + } gfs2_glock_dq_uninit(&gh); if (error)
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