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authorDavid Howells <dhowells@redhat.com>2008-11-14 10:39:22 +1100
committerJames Morris <jmorris@namei.org>2008-11-14 10:39:22 +1100
commit745ca2475a6ac596e3d8d37c2759c0fbe2586227 (patch)
treef87c34bdfbc8542477b16a014bbb4e3b415b286a /security/selinux
parent88e67f3b8898c5ea81d2916dd5b8bc9c0c35ba13 (diff)
downloadlinux-2.6.38-lt-ux500-745ca2475a6ac596e3d8d37c2759c0fbe2586227.tar.gz
CRED: Pass credentials through dentry_open()
Pass credentials through dentry_open() so that the COW creds patch can have SELinux's flush_unauthorized_files() pass the appropriate creds back to itself when it opens its null chardev. The security_dentry_open() call also now takes a creds pointer, as does the dentry_open hook in struct security_operations. Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: James Morris <jmorris@namei.org> Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'security/selinux')
-rw-r--r--security/selinux/hooks.c15
1 files changed, 9 insertions, 6 deletions
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index cc6e5a3f10c..f20cbd681ba 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -2150,9 +2150,9 @@ extern struct vfsmount *selinuxfs_mount;
extern struct dentry *selinux_null;
/* Derived from fs/exec.c:flush_old_files. */
-static inline void flush_unauthorized_files(struct files_struct *files)
+static inline void flush_unauthorized_files(const struct cred *cred,
+ struct files_struct *files)
{
- const struct cred *cred = current_cred();
struct avc_audit_data ad;
struct file *file, *devnull = NULL;
struct tty_struct *tty;
@@ -2222,7 +2222,10 @@ static inline void flush_unauthorized_files(struct files_struct *files)
if (devnull) {
get_file(devnull);
} else {
- devnull = dentry_open(dget(selinux_null), mntget(selinuxfs_mount), O_RDWR);
+ devnull = dentry_open(
+ dget(selinux_null),
+ mntget(selinuxfs_mount),
+ O_RDWR, cred);
if (IS_ERR(devnull)) {
devnull = NULL;
put_unused_fd(fd);
@@ -2302,6 +2305,7 @@ static void selinux_bprm_apply_creds(struct linux_binprm *bprm, int unsafe)
*/
static void selinux_bprm_post_apply_creds(struct linux_binprm *bprm)
{
+ const struct cred *cred = current_cred();
struct task_security_struct *tsec;
struct rlimit *rlim, *initrlim;
struct itimerval itimer;
@@ -2321,7 +2325,7 @@ static void selinux_bprm_post_apply_creds(struct linux_binprm *bprm)
return;
/* Close files for which the new task SID is not authorized. */
- flush_unauthorized_files(current->files);
+ flush_unauthorized_files(cred, current->files);
/* Check whether the new SID can inherit signal state
from the old SID. If not, clear itimers to avoid
@@ -3202,9 +3206,8 @@ static int selinux_file_receive(struct file *file)
return file_has_perm(cred, file, file_to_av(file));
}
-static int selinux_dentry_open(struct file *file)
+static int selinux_dentry_open(struct file *file, const struct cred *cred)
{
- const struct cred *cred = current_cred();
struct file_security_struct *fsec;
struct inode *inode;
struct inode_security_struct *isec;