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authorAl Viro <viro@zeniv.linux.org.uk>2014-10-23 21:26:21 +0400
committerAl Viro <viro@zeniv.linux.org.uk>2014-10-24 06:30:18 +0400
commit51486b900ee92856b977eacfc5bfbe6565028070 (patch)
tree7212a9d040a00c87bf8480d6ad4195658c4eca52 /fs/dcache.c
parentf114040e3ea6e07372334ade75d1ee0775c355e1 (diff)
downloadlinux-51486b900ee92856b977eacfc5bfbe6565028070.tar.xz
fix inode leaks on d_splice_alias() failure exits
d_splice_alias() callers expect it to either stash the inode reference into a new alias, or drop the inode reference. That makes it possible to just return d_splice_alias() result from ->lookup() instance, without any extra housekeeping required. Unfortunately, that should include the failure exits. If d_splice_alias() returns an error, it leaves the dentry it has been given negative and thus it *must* drop the inode reference. Easily fixed, but it goes way back and will need backporting. Cc: stable@vger.kernel.org Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/dcache.c')
-rw-r--r--fs/dcache.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/dcache.c b/fs/dcache.c
index d5a23fd0da90..3ffef7f4e5cd 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -2673,11 +2673,13 @@ struct dentry *d_splice_alias(struct inode *inode, struct dentry *dentry)
if (!IS_ROOT(new)) {
spin_unlock(&inode->i_lock);
dput(new);
+ iput(inode);
return ERR_PTR(-EIO);
}
if (d_ancestor(new, dentry)) {
spin_unlock(&inode->i_lock);
dput(new);
+ iput(inode);
return ERR_PTR(-EIO);
}
write_seqlock(&rename_lock);