>From 6a3fb632f67f8425c6e76c65dad8115f1550d2a0 Mon Sep 17 00:00:00 2001
From: Serge Hallyn <serge@xxxxxxxxxx>
Date: Sun, 7 May 2017 23:40:42 -0500
Subject: [PATCH 1/1] cap_inode_getsecurity: don't pin dentry (fold up)
This should fix the "Dentry_still_in_use" reported by the kernel
test robot.
Signed-off-by: Serge Hallyn <serge@xxxxxxxxxx>
---
security/commoncap.c | 27 +++++++++++++++------------
1 file changed, 15 insertions(+), 12 deletions(-)
diff --git a/security/commoncap.c b/security/commoncap.c
index a1a2935..c970b71 100644
--- a/security/commoncap.c
+++ b/security/commoncap.c
@@ -406,21 +406,21 @@ int cap_inode_getsecurity(struct inode *inode, const char *name, void **buffer,
&tmpbuf, size, GFP_NOFS);
if (ret < 0)
- return ret;
+ goto out;
fs_ns = inode->i_sb->s_user_ns;
cap = (struct vfs_cap_data *) tmpbuf;
if (is_v2header(ret, cap->magic_etc)) {
/* If this is sizeof(vfs_cap_data) then we're ok with the
* on-disk value, so return that. */
- if (alloc)
+ if (alloc) {
*buffer = tmpbuf;
- else
- kfree(tmpbuf);
- return ret;
+ tmpbuf = NULL;
+ }
+ goto out;
} else if (!is_v3header(ret, cap->magic_etc)) {
- kfree(tmpbuf);
- return -EINVAL;
+ ret = -EINVAL;
+ goto out;
}
nscap = (struct vfs_ns_cap_data *) tmpbuf;
@@ -434,14 +434,14 @@ int cap_inode_getsecurity(struct inode *inode, const char *name, void **buffer,
if (alloc) {
*buffer = tmpbuf;
nscap->rootid = cpu_to_le32(mappedroot);
- } else
- kfree(tmpbuf);
- return size;
+ tmpbuf = NULL;
+ }
+ goto out;
}
if (!rootid_owns_currentns(kroot)) {
- kfree(tmpbuf);
- return -EOPNOTSUPP;
+ ret = -EOPNOTSUPP;
+ goto out;
}
/* This comes from a parent namespace. Return as a v2 capability */
@@ -459,6 +459,9 @@ int cap_inode_getsecurity(struct inode *inode, const char *name, void **buffer,
cap->magic_etc = cpu_to_le32(magic);
}
}
+
+out:
+ dput(dentry);
kfree(tmpbuf);
return size;
}
--
2.7.4
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