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selinux: remove unnecessary selinux cred request

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task_security_struct was obtained at the beginning of may_create
and selinux_inode_init_security, no need to obtain again.
may_create will be called very frequently when create dir and file.

Cc: Paul Moore <paul@paul-moore.com>
Cc: Stephen Smalley <sds@tycho.nsa.gov>
Cc: Eric Paris <eparis@parisplace.org>
Signed-off-by: Yang Guo <guoyang2@huawei.com>
Signed-off-by: Shaokun Zhang <zhangshaokun@hisilicon.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
This commit is contained in:
Yang Guo 2019-12-12 10:02:24 +08:00 committed by Paul Moore
parent d8db60cb23
commit 210a292874
1 changed files with 3 additions and 4 deletions
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7
security/selinux/hooks.c
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@ -1833,8 +1833,8 @@ static int may_create(struct inode *dir,
if (rc)
return rc;
rc = selinux_determine_inode_label(selinux_cred(current_cred()), dir,
&dentry->d_name, tclass, &newsid);
rc = selinux_determine_inode_label(tsec, dir, &dentry->d_name, tclass,
&newsid);
if (rc)
return rc;
@ -2906,8 +2906,7 @@ static int selinux_inode_init_security(struct inode *inode, struct inode *dir,
newsid = tsec->create_sid;
rc = selinux_determine_inode_label(selinux_cred(current_cred()),
dir, qstr,
rc = selinux_determine_inode_label(tsec, dir, qstr,
inode_mode_to_security_class(inode->i_mode),
&newsid);
if (rc)