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CRED: Wrap current->cred and a few other accessors 

Wrap current->cred and a few other accessors to hide their actual
implementation.

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: James Morris <jmorris@namei.org>
Acked-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: James Morris <jmorris@namei.org>
This commit is contained in:
David Howells 2008-11-14 10:39:18 +11:00 committed by James Morris
parent f1752eec61
commit 86a264abe5
27 changed files with 271 additions and 162 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
arch/ia64/ia32/sys_ia32.c
View File

@ -1767,25 +1767,24 @@ groups16_from_user(struct group_info *group_info, short __user *grouplist)
asmlinkage long
sys32_getgroups16 (int gidsetsize, short __user *grouplist)
{
const struct cred *cred = current_cred();
int i;
if (gidsetsize < 0)
return -EINVAL;
get_group_info(current->cred->group_info);
i = current->cred->group_info->ngroups;
i = cred->group_info->ngroups;
if (gidsetsize) {
if (i > gidsetsize) {
i = -EINVAL;
goto out;
}
if (groups16_to_user(grouplist, current->cred->group_info)) {
if (groups16_to_user(grouplist, cred->group_info)) {
i = -EFAULT;
goto out;
}
}
out:
put_group_info(current->cred->group_info);
return i;
}

8
drivers/net/tun.c
View File

@ -702,6 +702,7 @@ static int tun_set_iff(struct net *net, struct file *file, struct ifreq *ifr)
struct tun_net *tn;
struct tun_struct *tun;
struct net_device *dev;
const struct cred *cred = current_cred();
int err;
tn = net_generic(net, tun_net_id);
@ -712,11 +713,12 @@ static int tun_set_iff(struct net *net, struct file *file, struct ifreq *ifr)
/* Check permissions */
if (((tun->owner != -1 &&
current_euid() != tun->owner) ||
cred->euid != tun->owner) ||
(tun->group != -1 &&
current_egid() != tun->group)) &&
!capable(CAP_NET_ADMIN))
cred->egid != tun->group)) &&
!capable(CAP_NET_ADMIN)) {
return -EPERM;
}
}
else if (__dev_get_by_name(net, ifr->ifr_name))
return -EINVAL;

10
drivers/usb/core/devio.c
View File

@ -574,6 +574,7 @@ static int usbdev_open(struct inode *inode, struct file *file)
{
struct usb_device *dev = NULL;
struct dev_state *ps;
const struct cred *cred = current_cred();
int ret;
lock_kernel();
@ -617,8 +618,8 @@ static int usbdev_open(struct inode *inode, struct file *file)
init_waitqueue_head(&ps->wait);
ps->discsignr = 0;
ps->disc_pid = get_pid(task_pid(current));
ps->disc_uid = current_uid();
ps->disc_euid = current_euid();
ps->disc_uid = cred->uid;
ps->disc_euid = cred->euid;
ps->disccontext = NULL;
ps->ifclaimed = 0;
security_task_getsecid(current, &ps->secid);
@ -967,6 +968,7 @@ static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
struct usb_host_endpoint *ep;
struct async *as;
struct usb_ctrlrequest *dr = NULL;
const struct cred *cred = current_cred();
unsigned int u, totlen, isofrmlen;
int ret, ifnum = -1;
int is_in;
@ -1174,8 +1176,8 @@ static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
as->signr = uurb->signr;
as->ifnum = ifnum;
as->pid = get_pid(task_pid(current));
as->uid = current_uid();
as->euid = current_euid();
as->uid = cred->uid;
as->euid = cred->euid;
security_task_getsecid(current, &as->secid);
if (!is_in) {
if (copy_from_user(as->urb->transfer_buffer, uurb->buffer,

10
fs/binfmt_elf.c
View File

@ -157,7 +157,7 @@ create_elf_tables(struct linux_binprm *bprm, struct elfhdr *exec,
int items;
elf_addr_t *elf_info;
int ei_index = 0;
struct task_struct *tsk = current;
const struct cred *cred = current_cred();
struct vm_area_struct *vma;
/*
@ -223,10 +223,10 @@ create_elf_tables(struct linux_binprm *bprm, struct elfhdr *exec,
NEW_AUX_ENT(AT_BASE, interp_load_addr);
NEW_AUX_ENT(AT_FLAGS, 0);
NEW_AUX_ENT(AT_ENTRY, exec->e_entry);
NEW_AUX_ENT(AT_UID, tsk->cred->uid);
NEW_AUX_ENT(AT_EUID, tsk->cred->euid);
NEW_AUX_ENT(AT_GID, tsk->cred->gid);
NEW_AUX_ENT(AT_EGID, tsk->cred->egid);
NEW_AUX_ENT(AT_UID, cred->uid);
NEW_AUX_ENT(AT_EUID, cred->euid);
NEW_AUX_ENT(AT_GID, cred->gid);
NEW_AUX_ENT(AT_EGID, cred->egid);
NEW_AUX_ENT(AT_SECURE, security_bprm_secureexec(bprm));
NEW_AUX_ENT(AT_EXECFN, bprm->exec);
if (k_platform) {

9
fs/binfmt_elf_fdpic.c
View File

@ -475,6 +475,7 @@ static int create_elf_fdpic_tables(struct linux_binprm *bprm,
struct elf_fdpic_params *exec_params,
struct elf_fdpic_params *interp_params)
{
const struct cred *cred = current_cred();
unsigned long sp, csp, nitems;
elf_caddr_t __user *argv, *envp;
size_t platform_len = 0, len;
@ -623,10 +624,10 @@ static int create_elf_fdpic_tables(struct linux_binprm *bprm,
NEW_AUX_ENT(AT_BASE, interp_params->elfhdr_addr);
NEW_AUX_ENT(AT_FLAGS, 0);
NEW_AUX_ENT(AT_ENTRY, exec_params->entry_addr);
NEW_AUX_ENT(AT_UID, (elf_addr_t) current->cred->uid);
NEW_AUX_ENT(AT_EUID, (elf_addr_t) current->cred->euid);
NEW_AUX_ENT(AT_GID, (elf_addr_t) current->cred->gid);
NEW_AUX_ENT(AT_EGID, (elf_addr_t) current->cred->egid);
NEW_AUX_ENT(AT_UID, (elf_addr_t) cred->uid);
NEW_AUX_ENT(AT_EUID, (elf_addr_t) cred->euid);
NEW_AUX_ENT(AT_GID, (elf_addr_t) cred->gid);
NEW_AUX_ENT(AT_EGID, (elf_addr_t) cred->egid);
NEW_AUX_ENT(AT_SECURE, security_bprm_secureexec(bprm));
NEW_AUX_ENT(AT_EXECFN, bprm->exec);

5
fs/exec.c
View File

@ -1388,6 +1388,7 @@ EXPORT_SYMBOL(set_binfmt);
*/
static int format_corename(char *corename, long signr)
{
const struct cred *cred = current_cred();
const char *pat_ptr = core_pattern;
int ispipe = (*pat_ptr == '|');
char *out_ptr = corename;
@ -1424,7 +1425,7 @@ static int format_corename(char *corename, long signr)
/* uid */
case 'u':
rc = snprintf(out_ptr, out_end - out_ptr,
"%d", current_uid());
"%d", cred->uid);
if (rc > out_end - out_ptr)
goto out;
out_ptr += rc;
@ -1432,7 +1433,7 @@ static int format_corename(char *corename, long signr)
/* gid */
case 'g':
rc = snprintf(out_ptr, out_end - out_ptr,
"%d", current_gid());
"%d", cred->gid);
if (rc > out_end - out_ptr)
goto out;
out_ptr += rc;

3
fs/fcntl.c
View File

@ -205,13 +205,14 @@ static void f_modown(struct file *filp, struct pid *pid, enum pid_type type,
int __f_setown(struct file *filp, struct pid *pid, enum pid_type type,
int force)
{
const struct cred *cred = current_cred();
int err;
err = security_file_set_fowner(filp);
if (err)
return err;
f_modown(filp, pid, type, current_uid(), current_euid(), force);
f_modown(filp, pid, type, cred->uid, cred->euid, force);
return 0;
}
EXPORT_SYMBOL(__f_setown);

7
fs/file_table.c
View File

@ -94,7 +94,7 @@ int proc_nr_files(ctl_table *table, int write, struct file *filp,
*/
struct file *get_empty_filp(void)
{
struct task_struct *tsk;
const struct cred *cred = current_cred();
static int old_max;
struct file * f;
@ -118,12 +118,11 @@ struct file *get_empty_filp(void)
if (security_file_alloc(f))
goto fail_sec;
tsk = current;
INIT_LIST_HEAD(&f->f_u.fu_list);
atomic_long_set(&f->f_count, 1);
rwlock_init(&f->f_owner.lock);
f->f_uid = tsk->cred->fsuid;
f->f_gid = tsk->cred->fsgid;
f->f_uid = cred->fsuid;
f->f_gid = cred->fsgid;
eventpoll_init_file(f);
/* f->f_version: 0 */
return f;

5
fs/hugetlbfs/inode.c
View File

@ -951,6 +951,7 @@ struct file *hugetlb_file_setup(const char *name, size_t size)
struct inode *inode;
struct dentry *dentry, *root;
struct qstr quick_string;
struct user_struct *user = current_user();
if (!hugetlbfs_vfsmount)
return ERR_PTR(-ENOENT);
@ -958,7 +959,7 @@ struct file *hugetlb_file_setup(const char *name, size_t size)
if (!can_do_hugetlb_shm())
return ERR_PTR(-EPERM);
if (!user_shm_lock(size, current->cred->user))
if (!user_shm_lock(size, user))
return ERR_PTR(-ENOMEM);
root = hugetlbfs_vfsmount->mnt_root;
@ -998,7 +999,7 @@ out_inode:
out_dentry:
dput(dentry);
out_shm_unlock:
user_shm_unlock(size, current->cred->user);
user_shm_unlock(size, user);
return ERR_PTR(error);
}

4
fs/ioprio.c
View File

@ -123,7 +123,7 @@ asmlinkage long sys_ioprio_set(int which, int who, int ioprio)
break;
case IOPRIO_WHO_USER:
if (!who)
user = current->cred->user;
user = current_user();
else
user = find_user(who);
@ -216,7 +216,7 @@ asmlinkage long sys_ioprio_get(int which, int who)
break;
case IOPRIO_WHO_USER:
if (!who)
user = current->cred->user;
user = current_user();
else
user = find_user(who);

3
fs/smbfs/dir.c
View File

@ -667,8 +667,7 @@ smb_make_node(struct inode *dir, struct dentry *dentry, int mode, dev_t dev)
attr.ia_valid = ATTR_MODE | ATTR_UID | ATTR_GID;
attr.ia_mode = mode;
attr.ia_uid = current_euid();
attr.ia_gid = current_egid();
current_euid_egid(&attr.ia_uid, &attr.ia_gid);
if (!new_valid_dev(dev))
return -EINVAL;

187
include/linux/cred.h
View File

@ -37,15 +37,16 @@ struct group_info {
* get_group_info - Get a reference to a group info structure
* @group_info: The group info to reference
*
* This must be called with the owning task locked (via task_lock()) when task
* != current. The reason being that the vast majority of callers are looking
* at current->group_info, which can not be changed except by the current task.
* Changing current->group_info requires the task lock, too.
* This gets a reference to a set of supplementary groups.
*
* If the caller is accessing a task's credentials, they must hold the RCU read
* lock when reading.
*/
#define get_group_info(group_info) \
do { \
atomic_inc(&(group_info)->usage); \
} while (0)
static inline struct group_info *get_group_info(struct group_info *gi)
{
atomic_inc(&gi->usage);
return gi;
}
/**
* put_group_info - Release a reference to a group info structure
@ -61,7 +62,7 @@ extern struct group_info *groups_alloc(int);
extern void groups_free(struct group_info *);
extern int set_current_groups(struct group_info *);
extern int set_groups(struct cred *, struct group_info *);
extern int groups_search(struct group_info *, gid_t);
extern int groups_search(const struct group_info *, gid_t);
/* access the groups "array" with this macro */
#define GROUP_AT(gi, i) \
@ -123,41 +124,6 @@ struct cred {
spinlock_t lock; /* lock for pointer changes */
};
#define get_current_user() (get_uid(current->cred->user))
#define task_uid(task) ((task)->cred->uid)
#define task_gid(task) ((task)->cred->gid)
#define task_euid(task) ((task)->cred->euid)
#define task_egid(task) ((task)->cred->egid)
#define current_uid() (current->cred->uid)
#define current_gid() (current->cred->gid)
#define current_euid() (current->cred->euid)
#define current_egid() (current->cred->egid)
#define current_suid() (current->cred->suid)
#define current_sgid() (current->cred->sgid)
#define current_fsuid() (current->cred->fsuid)
#define current_fsgid() (current->cred->fsgid)
#define current_cap() (current->cred->cap_effective)
#define current_uid_gid(_uid, _gid) \
do { \
*(_uid) = current->cred->uid; \
*(_gid) = current->cred->gid; \
} while(0)
#define current_euid_egid(_uid, _gid) \
do { \
*(_uid) = current->cred->euid; \
*(_gid) = current->cred->egid; \
} while(0)
#define current_fsuid_fsgid(_uid, _gid) \
do { \
*(_uid) = current->cred->fsuid; \
*(_gid) = current->cred->fsgid; \
} while(0)
extern void __put_cred(struct cred *);
extern int copy_creds(struct task_struct *, unsigned long);
@ -187,4 +153,137 @@ static inline void put_cred(struct cred *cred)
__put_cred(cred);
}
/**
* current_cred - Access the current task's credentials
*
* Access the credentials of the current task.
*/
#define current_cred() \
(current->cred)
/**
* __task_cred - Access another task's credentials
* @task: The task to query
*
* Access the credentials of another task. The caller must hold the
* RCU readlock.
*
* The caller must make sure task doesn't go away, either by holding a ref on
* task or by holding tasklist_lock to prevent it from being unlinked.
*/
#define __task_cred(task) \
((const struct cred *)(rcu_dereference((task)->cred)))
/**
* get_task_cred - Get another task's credentials
* @task: The task to query
*
* Get the credentials of a task, pinning them so that they can't go away.
* Accessing a task's credentials directly is not permitted.
*
* The caller must make sure task doesn't go away, either by holding a ref on
* task or by holding tasklist_lock to prevent it from being unlinked.
*/
#define get_task_cred(task) \
({ \
struct cred *__cred; \
rcu_read_lock(); \
__cred = (struct cred *) __task_cred((task)); \
get_cred(__cred); \
rcu_read_unlock(); \
__cred; \
})
/**
* get_current_cred - Get the current task's credentials
*
* Get the credentials of the current task, pinning them so that they can't go
* away. Accessing the current task's credentials directly is not permitted.
*/
#define get_current_cred() \
(get_cred(current_cred()))
/**
* get_current_user - Get the current task's user_struct
*
* Get the user record of the current task, pinning it so that it can't go
* away.
*/
#define get_current_user() \
({ \
struct user_struct *__u; \
struct cred *__cred; \
__cred = (struct cred *) current_cred(); \
__u = get_uid(__cred->user); \
__u; \
})
/**
* get_current_groups - Get the current task's supplementary group list
*
* Get the supplementary group list of the current task, pinning it so that it
* can't go away.
*/
#define get_current_groups() \
({ \
struct group_info *__groups; \
struct cred *__cred; \
__cred = (struct cred *) current_cred(); \
__groups = get_group_info(__cred->group_info); \
__groups; \
})
#define task_cred_xxx(task, xxx) \
({ \
__typeof__(task->cred->xxx) ___val; \
rcu_read_lock(); \
___val = __task_cred((task))->xxx; \
rcu_read_unlock(); \
___val; \
})
#define task_uid(task) (task_cred_xxx((task), uid))
#define task_euid(task) (task_cred_xxx((task), euid))
#define current_cred_xxx(xxx) \
({ \
current->cred->xxx; \
})
#define current_uid() (current_cred_xxx(uid))
#define current_gid() (current_cred_xxx(gid))
#define current_euid() (current_cred_xxx(euid))
#define current_egid() (current_cred_xxx(egid))
#define current_suid() (current_cred_xxx(suid))
#define current_sgid() (current_cred_xxx(sgid))
#define current_fsuid() (current_cred_xxx(fsuid))
#define current_fsgid() (current_cred_xxx(fsgid))
#define current_cap() (current_cred_xxx(cap_effective))
#define current_user() (current_cred_xxx(user))
#define current_security() (current_cred_xxx(security))
#define current_uid_gid(_uid, _gid) \
do { \
const struct cred *__cred; \
__cred = current_cred(); \
*(_uid) = __cred->uid; \
*(_gid) = __cred->gid; \
} while(0)
#define current_euid_egid(_euid, _egid) \
do { \
const struct cred *__cred; \
__cred = current_cred(); \
*(_euid) = __cred->euid; \
*(_egid) = __cred->egid; \
} while(0)
#define current_fsuid_fsgid(_fsuid, _fsgid) \
do { \
const struct cred *__cred; \
__cred = current_cred(); \
*(_fsuid) = __cred->fsuid; \
*(_fsgid) = __cred->fsgid; \
} while(0)
#endif /* _LINUX_CRED_H */

2
include/linux/securebits.h
View File

@ -32,7 +32,7 @@
setting is locked or not. A setting which is locked cannot be
changed from user-level. */
#define issecure_mask(X) (1 << (X))
#define issecure(X) (issecure_mask(X) & current->cred->securebits)
#define issecure(X) (issecure_mask(X) & current_cred_xxx(securebits))
#define SECURE_ALL_BITS (issecure_mask(SECURE_NOROOT) | \
issecure_mask(SECURE_NO_SETUID_FIXUP) | \

2
ipc/mqueue.c
View File

@ -112,6 +112,7 @@ static inline struct mqueue_inode_info *MQUEUE_I(struct inode *inode)
static struct inode *mqueue_get_inode(struct super_block *sb, int mode,
struct mq_attr *attr)
{
struct user_struct *u = current_user();
struct inode *inode;
inode = new_inode(sb);
@ -126,7 +127,6 @@ static struct inode *mqueue_get_inode(struct super_block *sb, int mode,
if (S_ISREG(mode)) {
struct mqueue_inode_info *info;
struct task_struct *p = current;
struct user_struct *u = p->cred->user;
unsigned long mq_bytes, mq_msg_tblsz;
inode->i_fop = &mqueue_file_operations;

4
ipc/shm.c
View File

@ -366,7 +366,7 @@ static int newseg(struct ipc_namespace *ns, struct ipc_params *params)
if (shmflg & SHM_HUGETLB) {
/* hugetlb_file_setup takes care of mlock user accounting */
file = hugetlb_file_setup(name, size);
shp->mlock_user = current->cred->user;
shp->mlock_user = current_user();
} else {
int acctflag = VM_ACCOUNT;
/*
@ -767,7 +767,7 @@ asmlinkage long sys_shmctl(int shmid, int cmd, struct shmid_ds __user *buf)
goto out_unlock;
if(cmd==SHM_LOCK) {
struct user_struct *user = current->cred->user;
struct user_struct *user = current_user();
if (!is_file_hugepages(shp->shm_file)) {
err = shmem_lock(shp->shm_file, 1, user);
if (!err && !(shp->shm_perm.mode & SHM_LOCKED)){

59
kernel/sys.c
View File

@ -143,6 +143,7 @@ asmlinkage long sys_setpriority(int which, int who, int niceval)
{
struct task_struct *g, *p;
struct user_struct *user;
const struct cred *cred = current_cred();
int error = -EINVAL;
struct pid *pgrp;
@ -176,18 +177,18 @@ asmlinkage long sys_setpriority(int which, int who, int niceval)
} while_each_pid_thread(pgrp, PIDTYPE_PGID, p);
break;
case PRIO_USER:
user = current->cred->user;
user = cred->user;
if (!who)
who = current_uid();
else
if (who != current_uid() && !(user = find_user(who)))
goto out_unlock; /* No processes for this user */
who = cred->uid;
else if ((who != cred->uid) &&
!(user = find_user(who)))
goto out_unlock; /* No processes for this user */
do_each_thread(g, p)
if (p->cred->uid == who)
if (__task_cred(p)->uid == who)
error = set_one_prio(p, niceval, error);
while_each_thread(g, p);
if (who != current_uid())
if (who != cred->uid)
free_uid(user); /* For find_user() */
break;
}
@ -207,6 +208,7 @@ asmlinkage long sys_getpriority(int which, int who)
{
struct task_struct *g, *p;
struct user_struct *user;
const struct cred *cred = current_cred();
long niceval, retval = -ESRCH;
struct pid *pgrp;
@ -238,21 +240,21 @@ asmlinkage long sys_getpriority(int which, int who)
} while_each_pid_thread(pgrp, PIDTYPE_PGID, p);
break;
case PRIO_USER:
user = current->cred->user;
user = (struct user_struct *) cred->user;
if (!who)
who = current_uid();
else
if (who != current_uid() && !(user = find_user(who)))
goto out_unlock; /* No processes for this user */
who = cred->uid;
else if ((who != cred->uid) &&
!(user = find_user(who)))
goto out_unlock; /* No processes for this user */
do_each_thread(g, p)
if (p->cred->uid == who) {
if (__task_cred(p)->uid == who) {
niceval = 20 - task_nice(p);
if (niceval > retval)
retval = niceval;
}
while_each_thread(g, p);
if (who != current_uid())
if (who != cred->uid)
free_uid(user); /* for find_user() */
break;
}
@ -743,11 +745,11 @@ asmlinkage long sys_setresuid(uid_t ruid, uid_t euid, uid_t suid)
asmlinkage long sys_getresuid(uid_t __user *ruid, uid_t __user *euid, uid_t __user *suid)
{
struct cred *cred = current->cred;
const struct cred *cred = current_cred();
int retval;
if (!(retval = put_user(cred->uid, ruid)) &&
!(retval = put_user(cred->euid, euid)))
if (!(retval = put_user(cred->uid, ruid)) &&
!(retval = put_user(cred->euid, euid)))
retval = put_user(cred->suid, suid);
return retval;
@ -796,11 +798,11 @@ asmlinkage long sys_setresgid(gid_t rgid, gid_t egid, gid_t sgid)
asmlinkage long sys_getresgid(gid_t __user *rgid, gid_t __user *egid, gid_t __user *sgid)
{
struct cred *cred = current->cred;
const struct cred *cred = current_cred();
int retval;
if (!(retval = put_user(cred->gid, rgid)) &&
!(retval = put_user(cred->egid, egid)))
if (!(retval = put_user(cred->gid, rgid)) &&
!(retval = put_user(cred->egid, egid)))
retval = put_user(cred->sgid, sgid);
return retval;
@ -1199,7 +1201,7 @@ static void groups_sort(struct group_info *group_info)
}
/* a simple bsearch */
int groups_search(struct group_info *group_info, gid_t grp)
int groups_search(const struct group_info *group_info, gid_t grp)
{
unsigned int left, right;
@ -1268,13 +1270,8 @@ EXPORT_SYMBOL(set_current_groups);
asmlinkage long sys_getgroups(int gidsetsize, gid_t __user *grouplist)
{
struct cred *cred = current->cred;
int i = 0;
/*
* SMP: Nobody else can change our grouplist. Thus we are
* safe.
*/
const struct cred *cred = current_cred();
int i;
if (gidsetsize < 0)
return -EINVAL;
@ -1330,8 +1327,9 @@ asmlinkage long sys_setgroups(int gidsetsize, gid_t __user *grouplist)
*/
int in_group_p(gid_t grp)
{
struct cred *cred = current->cred;
const struct cred *cred = current_cred();
int retval = 1;
if (grp != cred->fsgid)
retval = groups_search(cred->group_info, grp);
return retval;
@ -1341,8 +1339,9 @@ EXPORT_SYMBOL(in_group_p);
int in_egroup_p(gid_t grp)
{
struct cred *cred = current->cred;
const struct cred *cred = current_cred();
int retval = 1;
if (grp != cred->egid)
retval = groups_search(cred->group_info, grp);
return retval;

31
kernel/uid16.c
View File

@ -84,11 +84,12 @@ asmlinkage long sys_setresuid16(old_uid_t ruid, old_uid_t euid, old_uid_t suid)
asmlinkage long sys_getresuid16(old_uid_t __user *ruid, old_uid_t __user *euid, old_uid_t __user *suid)
{
const struct cred *cred = current_cred();
int retval;
if (!(retval = put_user(high2lowuid(current->cred->uid), ruid)) &&
!(retval = put_user(high2lowuid(current->cred->euid), euid)))
retval = put_user(high2lowuid(current->cred->suid), suid);
if (!(retval = put_user(high2lowuid(cred->uid), ruid)) &&
!(retval = put_user(high2lowuid(cred->euid), euid)))
retval = put_user(high2lowuid(cred->suid), suid);
return retval;
}
@ -104,11 +105,12 @@ asmlinkage long sys_setresgid16(old_gid_t rgid, old_gid_t egid, old_gid_t sgid)
asmlinkage long sys_getresgid16(old_gid_t __user *rgid, old_gid_t __user *egid, old_gid_t __user *sgid)
{
const struct cred *cred = current_cred();
int retval;
if (!(retval = put_user(high2lowgid(current->cred->gid), rgid)) &&
!(retval = put_user(high2lowgid(current->cred->egid), egid)))
retval = put_user(high2lowgid(current->cred->sgid), sgid);
if (!(retval = put_user(high2lowgid(cred->gid), rgid)) &&
!(retval = put_user(high2lowgid(cred->egid), egid)))
retval = put_user(high2lowgid(cred->sgid), sgid);
return retval;
}
@ -161,25 +163,24 @@ static int groups16_from_user(struct group_info *group_info,
asmlinkage long sys_getgroups16(int gidsetsize, old_gid_t __user *grouplist)
{
int i = 0;
const struct cred *cred = current_cred();
int i;
if (gidsetsize < 0)
return -EINVAL;
get_group_info(current->cred->group_info);
i = current->cred->group_info->ngroups;
i = cred->group_info->ngroups;
if (gidsetsize) {
if (i > gidsetsize) {
i = -EINVAL;
goto out;
}
if (groups16_to_user(grouplist, current->cred->group_info)) {
if (groups16_to_user(grouplist, cred->group_info)) {
i = -EFAULT;
goto out;
}
}
out:
put_group_info(current->cred->group_info);
return i;
}
@ -210,20 +211,20 @@ asmlinkage long sys_setgroups16(int gidsetsize, old_gid_t __user *grouplist)
asmlinkage long sys_getuid16(void)
{
return high2lowuid(current->cred->uid);
return high2lowuid(current_uid());
}
asmlinkage long sys_geteuid16(void)
{
return high2lowuid(current->cred->euid);
return high2lowuid(current_euid());
}
asmlinkage long sys_getgid16(void)
{
return high2lowgid(current->cred->gid);
return high2lowgid(current_gid());
}
asmlinkage long sys_getegid16(void)
{
return high2lowgid(current->cred->egid);
return high2lowgid(current_egid());
}

2
net/core/scm.c
View File

@ -44,7 +44,7 @@
static __inline__ int scm_check_creds(struct ucred *creds)
{
struct cred *cred = current->cred;
const struct cred *cred = current_cred();
if ((creds->pid == task_tgid_vnr(current) || capable(CAP_SYS_ADMIN)) &&
((creds->uid == cred->uid || creds->uid == cred->euid ||

14
net/sunrpc/auth.c
View File

@ -350,16 +350,18 @@ EXPORT_SYMBOL_GPL(rpcauth_lookup_credcache);
struct rpc_cred *
rpcauth_lookupcred(struct rpc_auth *auth, int flags)
{
struct auth_cred acred = {
.uid = current_fsuid(),
.gid = current_fsgid(),
.group_info = current->cred->group_info,
};
struct auth_cred acred;
struct rpc_cred *ret;
const struct cred *cred = current_cred();
dprintk("RPC: looking up %s cred\n",
auth->au_ops->au_name);
get_group_info(acred.group_info);
memset(&acred, 0, sizeof(acred));
acred.uid = cred->fsuid;
acred.gid = cred->fsgid;
acred.group_info = get_group_info(((struct cred *)cred)->group_info);
ret = auth->au_ops->lookup_cred(auth, &acred, flags);
put_group_info(acred.group_info);
return ret;

2
security/commoncap.c
View File

@ -641,7 +641,7 @@ int cap_task_setnice (struct task_struct *p, int nice)
int cap_task_prctl(int option, unsigned long arg2, unsigned long arg3,
unsigned long arg4, unsigned long arg5, long *rc_p)
{
struct cred *cred = current->cred;
struct cred *cred = current_cred();
long error = 0;
switch (option) {

2
security/keys/process_keys.c
View File

@ -582,7 +582,7 @@ key_ref_t lookup_user_key(key_serial_t id, int create, int partial,
{
struct request_key_auth *rka;
struct task_struct *t = current;
struct cred *cred = t->cred;
struct cred *cred = current_cred();
struct key *key;
key_ref_t key_ref, skey_ref;
int ret;

11
security/keys/request_key.c
View File

@ -67,6 +67,7 @@ static int call_sbin_request_key(struct key_construction *cons,
void *aux)
{
struct task_struct *tsk = current;
const struct cred *cred = current_cred();
key_serial_t prkey, sskey;
struct key *key = cons->key, *authkey = cons->authkey, *keyring;
char *argv[9], *envp[3], uid_str[12], gid_str[12];
@ -96,16 +97,16 @@ static int call_sbin_request_key(struct key_construction *cons,
goto error_link;
/* record the UID and GID */
sprintf(uid_str, "%d", current_fsuid());
sprintf(gid_str, "%d", current_fsgid());
sprintf(uid_str, "%d", cred->fsuid);
sprintf(gid_str, "%d", cred->fsgid);
/* we say which key is under construction */
sprintf(key_str, "%d", key->serial);
/* we specify the process's default keyrings */
sprintf(keyring_str[0], "%d",
tsk->cred->thread_keyring ?
tsk->cred->thread_keyring->serial : 0);
cred->thread_keyring ?
cred->thread_keyring->serial : 0);
prkey = 0;
if (tsk->signal->process_keyring)
@ -118,7 +119,7 @@ static int call_sbin_request_key(struct key_construction *cons,
sskey = rcu_dereference(tsk->signal->session_keyring)->serial;
rcu_read_unlock();
} else {
sskey = tsk->cred->user->session_keyring->serial;
sskey = cred->user->session_keyring->serial;
}
sprintf(keyring_str[2], "%d", sskey);

8
security/selinux/exports.c
View File

@ -39,9 +39,13 @@ EXPORT_SYMBOL_GPL(selinux_string_to_sid);
int selinux_secmark_relabel_packet_permission(u32 sid)
{
if (selinux_enabled) {
struct task_security_struct *tsec = current->cred->security;
const struct task_security_struct *__tsec;
u32 tsid;
return avc_has_perm(tsec->sid, sid, SECCLASS_PACKET,
__tsec = current_security();
tsid = __tsec->sid;
return avc_has_perm(tsid, sid, SECCLASS_PACKET,
PACKET__RELABELTO, NULL);
}
return 0;

6
security/selinux/xfrm.c
View File

@ -197,7 +197,7 @@ static int selinux_xfrm_sec_ctx_alloc(struct xfrm_sec_ctx **ctxp,
struct xfrm_user_sec_ctx *uctx, u32 sid)
{
int rc = 0;
struct task_security_struct *tsec = current->cred->security;
const struct task_security_struct *tsec = current_security();
struct xfrm_sec_ctx *ctx = NULL;
char *ctx_str = NULL;
u32 str_len;
@ -333,7 +333,7 @@ void selinux_xfrm_policy_free(struct xfrm_sec_ctx *ctx)
*/
int selinux_xfrm_policy_delete(struct xfrm_sec_ctx *ctx)
{
struct task_security_struct *tsec = current->cred->security;
const struct task_security_struct *tsec = current_security();
int rc = 0;
if (ctx) {
@ -378,7 +378,7 @@ void selinux_xfrm_state_free(struct xfrm_state *x)
*/
int selinux_xfrm_state_delete(struct xfrm_state *x)
{
struct task_security_struct *tsec = current->cred->security;
const struct task_security_struct *tsec = current_security();
struct xfrm_sec_ctx *ctx = x->security;
int rc = 0;

2
security/smack/smack_access.c
View File

@ -164,7 +164,7 @@ int smk_curacc(char *obj_label, u32 mode)
{
int rc;
rc = smk_access(current->cred->security, obj_label, mode);
rc = smk_access(current_security(), obj_label, mode);
if (rc == 0)
return 0;

26
security/smack/smack_lsm.c
View File

@ -143,7 +143,7 @@ static int smack_ptrace_traceme(struct task_struct *ptp)
static int smack_syslog(int type)
{
int rc;
char *sp = current->cred->security;
char *sp = current_security();
rc = cap_syslog(type);
if (rc != 0)
@ -375,7 +375,7 @@ static int smack_sb_umount(struct vfsmount *mnt, int flags)
*/
static int smack_inode_alloc_security(struct inode *inode)
{
inode->i_security = new_inode_smack(current->cred->security);
inode->i_security = new_inode_smack(current_security());
if (inode->i_security == NULL)
return -ENOMEM;
return 0;
@ -820,7 +820,7 @@ static int smack_file_permission(struct file *file, int mask)
*/
static int smack_file_alloc_security(struct file *file)
{
file->f_security = current->cred->security;
file->f_security = current_security();
return 0;
}
@ -918,7 +918,7 @@ static int smack_file_fcntl(struct file *file, unsigned int cmd,
*/
static int smack_file_set_fowner(struct file *file)
{
file->f_security = current->cred->security;
file->f_security = current_security();
return 0;
}
@ -986,8 +986,7 @@ static int smack_file_receive(struct file *file)
*/
static int smack_cred_alloc_security(struct cred *cred)
{
cred->security = current->cred->security;
cred->security = current_security();
return 0;
}
@ -1225,7 +1224,7 @@ static void smack_task_to_inode(struct task_struct *p, struct inode *inode)
*/
static int smack_sk_alloc_security(struct sock *sk, int family, gfp_t gfp_flags)
{
char *csp = current->cred->security;
char *csp = current_security();
struct socket_smack *ssp;
ssp = kzalloc(sizeof(struct socket_smack), gfp_flags);
@ -1450,7 +1449,7 @@ static int smack_flags_to_may(int flags)
*/
static int smack_msg_msg_alloc_security(struct msg_msg *msg)
{
msg->security = current->cred->security;
msg->security = current_security();
return 0;
}
@ -1486,7 +1485,7 @@ static int smack_shm_alloc_security(struct shmid_kernel *shp)
{
struct kern_ipc_perm *isp = &shp->shm_perm;
isp->security = current->cred->security;
isp->security = current_security();
return 0;
}
@ -1595,7 +1594,7 @@ static int smack_sem_alloc_security(struct sem_array *sma)
{
struct kern_ipc_perm *isp = &sma->sem_perm;
isp->security = current->cred->security;
isp->security = current_security();
return 0;
}
@ -1699,7 +1698,7 @@ static int smack_msg_queue_alloc_security(struct msg_queue *msq)
{
struct kern_ipc_perm *kisp = &msq->q_perm;
kisp->security = current->cred->security;
kisp->security = current_security();
return 0;
}
@ -1854,7 +1853,7 @@ static void smack_d_instantiate(struct dentry *opt_dentry, struct inode *inode)
struct super_block *sbp;
struct superblock_smack *sbsp;
struct inode_smack *isp;
char *csp = current->cred->security;
char *csp = current_security();
char *fetched;
char *final;
struct dentry *dp;
@ -2290,8 +2289,7 @@ static void smack_sock_graft(struct sock *sk, struct socket *parent)
return;
ssp = sk->sk_security;
ssp->smk_in = current->cred->security;
ssp->smk_out = current->cred->security;
ssp->smk_in = ssp->smk_out = current_security();
ssp->smk_packet[0] = '\0';
rc = smack_netlabel(sk);

4
security/smack/smackfs.c
View File

@ -336,7 +336,7 @@ static void smk_cipso_doi(void)
audit_info.loginuid = audit_get_loginuid(current);
audit_info.sessionid = audit_get_sessionid(current);
audit_info.secid = smack_to_secid(current->cred->security);
audit_info.secid = smack_to_secid(current_security());
rc = netlbl_cfg_map_del(NULL, &audit_info);
if (rc != 0)
@ -371,7 +371,7 @@ static void smk_unlbl_ambient(char *oldambient)
audit_info.loginuid = audit_get_loginuid(current);
audit_info.sessionid = audit_get_sessionid(current);
audit_info.secid = smack_to_secid(current->cred->security);
audit_info.secid = smack_to_secid(current_security());
if (oldambient != NULL) {
rc = netlbl_cfg_map_del(oldambient, &audit_info);