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-rw-r--r--security/device_cgroup.c15
1 files changed, 7 insertions, 8 deletions
diff --git a/security/device_cgroup.c b/security/device_cgroup.c
index 44dfc415a379..46d01fcc0d15 100644
--- a/security/device_cgroup.c
+++ b/security/device_cgroup.c
@@ -533,10 +533,10 @@ struct cgroup_subsys devices_subsys = {
533 * 533 *
534 * returns 0 on success, -EPERM case the operation is not permitted 534 * returns 0 on success, -EPERM case the operation is not permitted
535 */ 535 */
536static int __devcgroup_check_permission(struct dev_cgroup *dev_cgroup, 536static int __devcgroup_check_permission(short type, u32 major, u32 minor,
537 short type, u32 major, u32 minor,
538 short access) 537 short access)
539{ 538{
539 struct dev_cgroup *dev_cgroup;
540 struct dev_exception_item ex; 540 struct dev_exception_item ex;
541 int rc; 541 int rc;
542 542
@@ -547,6 +547,7 @@ static int __devcgroup_check_permission(struct dev_cgroup *dev_cgroup,
547 ex.access = access; 547 ex.access = access;
548 548
549 rcu_read_lock(); 549 rcu_read_lock();
550 dev_cgroup = task_devcgroup(current);
550 rc = may_access(dev_cgroup, &ex); 551 rc = may_access(dev_cgroup, &ex);
551 rcu_read_unlock(); 552 rcu_read_unlock();
552 553
@@ -558,7 +559,6 @@ static int __devcgroup_check_permission(struct dev_cgroup *dev_cgroup,
558 559
559int __devcgroup_inode_permission(struct inode *inode, int mask) 560int __devcgroup_inode_permission(struct inode *inode, int mask)
560{ 561{
561 struct dev_cgroup *dev_cgroup = task_devcgroup(current);
562 short type, access = 0; 562 short type, access = 0;
563 563
564 if (S_ISBLK(inode->i_mode)) 564 if (S_ISBLK(inode->i_mode))
@@ -570,13 +570,12 @@ int __devcgroup_inode_permission(struct inode *inode, int mask)
570 if (mask & MAY_READ) 570 if (mask & MAY_READ)
571 access |= ACC_READ; 571 access |= ACC_READ;
572 572
573 return __devcgroup_check_permission(dev_cgroup, type, imajor(inode), 573 return __devcgroup_check_permission(type, imajor(inode), iminor(inode),
574 iminor(inode), access); 574 access);
575} 575}
576 576
577int devcgroup_inode_mknod(int mode, dev_t dev) 577int devcgroup_inode_mknod(int mode, dev_t dev)
578{ 578{
579 struct dev_cgroup *dev_cgroup = task_devcgroup(current);
580 short type; 579 short type;
581 580
582 if (!S_ISBLK(mode) && !S_ISCHR(mode)) 581 if (!S_ISBLK(mode) && !S_ISCHR(mode))
@@ -587,7 +586,7 @@ int devcgroup_inode_mknod(int mode, dev_t dev)
587 else 586 else
588 type = DEV_CHAR; 587 type = DEV_CHAR;
589 588
590 return __devcgroup_check_permission(dev_cgroup, type, MAJOR(dev), 589 return __devcgroup_check_permission(type, MAJOR(dev), MINOR(dev),
591 MINOR(dev), ACC_MKNOD); 590 ACC_MKNOD);
592 591
593} 592}