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-rw-r--r--fs/proc/proc_sysctl.c15
1 files changed, 12 insertions, 3 deletions
diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c
index 8989936f2995..4d765e5e91ed 100644
--- a/fs/proc/proc_sysctl.c
+++ b/fs/proc/proc_sysctl.c
@@ -554,9 +554,8 @@ static struct dentry *proc_sys_lookup(struct inode *dir, struct dentry *dentry,
if (!inode)
goto out;
- err = NULL;
d_set_d_op(dentry, &proc_sys_dentry_operations);
- d_add(dentry, inode);
+ err = d_splice_alias(inode, dentry);
out:
if (h)
@@ -684,6 +683,7 @@ static bool proc_sys_fill_cache(struct file *file,
if (IS_ERR(child))
return false;
if (d_in_lookup(child)) {
+ struct dentry *res;
inode = proc_sys_make_inode(dir->d_sb, head, table);
if (!inode) {
d_lookup_done(child);
@@ -691,7 +691,16 @@ static bool proc_sys_fill_cache(struct file *file,
return false;
}
d_set_d_op(child, &proc_sys_dentry_operations);
- d_add(child, inode);
+ res = d_splice_alias(inode, child);
+ d_lookup_done(child);
+ if (unlikely(res)) {
+ if (IS_ERR(res)) {
+ dput(child);
+ return false;
+ }
+ dput(child);
+ child = res;
+ }
}
}
inode = d_inode(child);