From 3e62cbb8436f6c0cb799c8b7f106de7f662a7b8d Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Tue, 1 Jun 2010 09:14:04 +0200 Subject: [PATCH] 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 Acked-by: Casey Schaufler Signed-off-by: James Morris --- security/smack/smack_lsm.c | 14 ++------------ 1 file 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; } -- GitLab