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| author | Dan Carpenter <error27@gmail.com> | 2010-06-01 09:14:04 +0200 |
|---|---|---|
| committer | James Morris <jmorris@namei.org> | 2010-08-02 15:33:39 +1000 |
| commit | 3e62cbb8436f6c0cb799c8b7f106de7f662a7b8d (patch) | |
| tree | d36565a4a6f7e0372a1fd9a8750b005635c9c335 /security/smack/smack_lsm.c | |
| parent | c3ef1500ec833890275172c7d063333404b64d60 (diff) | |
| download | lwn-3e62cbb8436f6c0cb799c8b7f106de7f662a7b8d.tar.gz lwn-3e62cbb8436f6c0cb799c8b7f106de7f662a7b8d.zip | |
smack: opt_dentry is never null in in smack_d_instantiate()
This patch removes some unneeded code for if opt_dentry is null because
that can never happen.
The function dereferences "opt_dentry" earlier when it checks
"if (opt_dentry->d_parent == opt_dentry) {". That code was added in
2008.
This function called from security_d_instantiate(). I checked all the
places which call security_d_instantiate() and dentry is always non-null.
I also checked the selinux version of this hook and there is a comment
which says that dentry should be non-null if called from
d_instantiate().
Signed-off-by: Dan Carpenter <error27@gmail.com>
Acked-by: Casey Schaufler <casey@schaufler-ca.com>
Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'security/smack/smack_lsm.c')
| -rw-r--r-- | security/smack/smack_lsm.c | 14 |
1 files changed, 2 insertions, 12 deletions
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c index 0f2fc480fc61..07abc9ce72f2 100644 --- a/security/smack/smack_lsm.c +++ b/security/smack/smack_lsm.c @@ -2191,7 +2191,7 @@ static void smack_ipc_getsecid(struct kern_ipc_perm *ipp, u32 *secid) /** * smack_d_instantiate - Make sure the blob is correct on an inode - * @opt_dentry: unused + * @opt_dentry: dentry where inode will be attached * @inode: the object * * Set the inode's security blob if it hasn't been done already. @@ -2310,20 +2310,10 @@ static void smack_d_instantiate(struct dentry *opt_dentry, struct inode *inode) /* * Get the dentry for xattr. */ - if (opt_dentry == NULL) { - dp = d_find_alias(inode); - if (dp == NULL) - break; - } else { - dp = dget(opt_dentry); - if (dp == NULL) - break; - } - + dp = dget(opt_dentry); fetched = smk_fetch(inode, dp); if (fetched != NULL) final = fetched; - dput(dp); break; } |