summaryrefslogtreecommitdiffstats
path: root/fs/dcache.c
diff options
context:
space:
mode:
authorJ. Bruce Fields <bfields@redhat.com>2014-03-12 12:19:23 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2014-08-07 14:40:11 -0400
commit95ad5c291313b66a98a44dc92b57e0b37c1dd589 (patch)
tree280b21d80632acd09ae17b9eace58e321bda41fb /fs/dcache.c
parent9635389534a765c8357d988e53d323bf033dcdd0 (diff)
downloadlinux-95ad5c291313b66a98a44dc92b57e0b37c1dd589.tar.bz2
dcache: d_splice_alias should detect loops
I believe this can only happen in the case of a corrupted filesystem. So -EIO looks like the appropriate error. Signed-off-by: J. Bruce Fields <bfields@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/dcache.c')
-rw-r--r--fs/dcache.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/dcache.c b/fs/dcache.c
index 85a2aad3dcb3..ad137005cda7 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -2706,6 +2706,11 @@ struct dentry *d_splice_alias(struct inode *inode, struct dentry *dentry)
dput(new);
return ERR_PTR(-EIO);
}
+ if (d_ancestor(new, dentry)) {
+ spin_unlock(&inode->i_lock);
+ dput(new);
+ return ERR_PTR(-EIO);
+ }
write_seqlock(&rename_lock);
__d_materialise_dentry(dentry, new);
write_sequnlock(&rename_lock);