From 9548906b2bb7ff09e12c013a55d669bef2c8e121 Mon Sep 17 00:00:00 2001 From: Tetsuo Handa Date: Thu, 25 Jul 2013 05:44:02 +0900 Subject: xattr: Constify ->name member of "struct xattr". Since everybody sets kstrdup()ed constant string to "struct xattr"->name but nobody modifies "struct xattr"->name , we can omit kstrdup() and its failure checking by constifying ->name member of "struct xattr". Signed-off-by: Tetsuo Handa Reviewed-by: Joel Becker [ocfs2] Acked-by: Serge E. Hallyn Acked-by: Casey Schaufler Acked-by: Mimi Zohar Reviewed-by: Paul Moore Tested-by: Paul Moore Acked-by: Eric Paris Signed-off-by: James Morris --- security/capability.c | 2 +- security/integrity/evm/evm_main.c | 2 +- security/security.c | 8 +++----- security/selinux/hooks.c | 17 ++++++----------- security/smack/smack_lsm.c | 9 +++------ 5 files changed, 14 insertions(+), 24 deletions(-) (limited to 'security') diff --git a/security/capability.c b/security/capability.c index 32b515766df1..dbeb9bc27b24 100644 --- a/security/capability.c +++ b/security/capability.c @@ -129,7 +129,7 @@ static void cap_inode_free_security(struct inode *inode) } static int cap_inode_init_security(struct inode *inode, struct inode *dir, - const struct qstr *qstr, char **name, + const struct qstr *qstr, const char **name, void **value, size_t *len) { return -EOPNOTSUPP; diff --git a/security/integrity/evm/evm_main.c b/security/integrity/evm/evm_main.c index df0fa451a871..af9b6852f4e1 100644 --- a/security/integrity/evm/evm_main.c +++ b/security/integrity/evm/evm_main.c @@ -418,7 +418,7 @@ int evm_inode_init_security(struct inode *inode, evm_xattr->value = xattr_data; evm_xattr->value_len = sizeof(*xattr_data); - evm_xattr->name = kstrdup(XATTR_EVM_SUFFIX, GFP_NOFS); + evm_xattr->name = XATTR_EVM_SUFFIX; return 0; out: kfree(xattr_data); diff --git a/security/security.c b/security/security.c index 94b35aef6871..4dc31f4f2700 100644 --- a/security/security.c +++ b/security/security.c @@ -348,10 +348,10 @@ int security_inode_init_security(struct inode *inode, struct inode *dir, if (unlikely(IS_PRIVATE(inode))) return 0; - memset(new_xattrs, 0, sizeof new_xattrs); if (!initxattrs) return security_ops->inode_init_security(inode, dir, qstr, NULL, NULL, NULL); + memset(new_xattrs, 0, sizeof(new_xattrs)); lsm_xattr = new_xattrs; ret = security_ops->inode_init_security(inode, dir, qstr, &lsm_xattr->name, @@ -366,16 +366,14 @@ int security_inode_init_security(struct inode *inode, struct inode *dir, goto out; ret = initxattrs(inode, new_xattrs, fs_data); out: - for (xattr = new_xattrs; xattr->name != NULL; xattr++) { - kfree(xattr->name); + for (xattr = new_xattrs; xattr->value != NULL; xattr++) kfree(xattr->value); - } return (ret == -EOPNOTSUPP) ? 0 : ret; } EXPORT_SYMBOL(security_inode_init_security); int security_old_inode_init_security(struct inode *inode, struct inode *dir, - const struct qstr *qstr, char **name, + const struct qstr *qstr, const char **name, void **value, size_t *len) { if (unlikely(IS_PRIVATE(inode))) diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index c956390a9136..a5091ec06aa6 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -2587,7 +2587,8 @@ static int selinux_dentry_init_security(struct dentry *dentry, int mode, } static int selinux_inode_init_security(struct inode *inode, struct inode *dir, - const struct qstr *qstr, char **name, + const struct qstr *qstr, + const char **name, void **value, size_t *len) { const struct task_security_struct *tsec = current_security(); @@ -2595,7 +2596,7 @@ static int selinux_inode_init_security(struct inode *inode, struct inode *dir, struct superblock_security_struct *sbsec; u32 sid, newsid, clen; int rc; - char *namep = NULL, *context; + char *context; dsec = dir->i_security; sbsec = dir->i_sb->s_security; @@ -2631,19 +2632,13 @@ static int selinux_inode_init_security(struct inode *inode, struct inode *dir, if (!ss_initialized || !(sbsec->flags & SE_SBLABELSUPP)) return -EOPNOTSUPP; - if (name) { - namep = kstrdup(XATTR_SELINUX_SUFFIX, GFP_NOFS); - if (!namep) - return -ENOMEM; - *name = namep; - } + if (name) + *name = XATTR_SELINUX_SUFFIX; if (value && len) { rc = security_sid_to_context_force(newsid, &context, &clen); - if (rc) { - kfree(namep); + if (rc) return rc; - } *value = context; *len = clen; } diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c index 3f7682a387b7..a113a779f00c 100644 --- a/security/smack/smack_lsm.c +++ b/security/smack/smack_lsm.c @@ -582,7 +582,7 @@ static void smack_inode_free_security(struct inode *inode) * Returns 0 if it all works out, -ENOMEM if there's no memory */ static int smack_inode_init_security(struct inode *inode, struct inode *dir, - const struct qstr *qstr, char **name, + const struct qstr *qstr, const char **name, void **value, size_t *len) { struct inode_smack *issp = inode->i_security; @@ -591,11 +591,8 @@ static int smack_inode_init_security(struct inode *inode, struct inode *dir, char *dsp = smk_of_inode(dir); int may; - if (name) { - *name = kstrdup(XATTR_SMACK_SUFFIX, GFP_NOFS); - if (*name == NULL) - return -ENOMEM; - } + if (name) + *name = XATTR_SMACK_SUFFIX; if (value) { rcu_read_lock(); -- cgit v1.2.3-59-g8ed1b