From: Steven Whitehouse Date: Wed, 9 Dec 2009 13:55:12 +0000 (+0000) Subject: GFS2: Fix locking bug in rename X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=24b977b5fdea09bf356428870d32c09a275c8a3e;p=linux.git GFS2: Fix locking bug in rename The rename code was taking a resource group lock in cases where it wasn't actually needed, this caused problems if the rename was resulting in an inode being unlinked. The patch ensures that we only take the rgrp lock early if it is really needed. Signed-off-by: Steven Whitehouse --- diff --git a/fs/gfs2/ops_inode.c b/fs/gfs2/ops_inode.c index 247436c10deb8..78f73ca1ef3e8 100644 --- a/fs/gfs2/ops_inode.c +++ b/fs/gfs2/ops_inode.c @@ -748,7 +748,7 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry, struct gfs2_rgrpd *nrgd; unsigned int num_gh; int dir_rename = 0; - int alloc_required; + int alloc_required = 0; unsigned int x; int error; @@ -867,7 +867,9 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry, goto out_gunlock; } - alloc_required = error = gfs2_diradd_alloc_required(ndir, &ndentry->d_name); + if (nip == NULL) + alloc_required = gfs2_diradd_alloc_required(ndir, &ndentry->d_name); + error = alloc_required; if (error < 0) goto out_gunlock; error = 0;