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authorDavid Howells <dhowells@redhat.com>2008-11-14 10:39:16 +1100
committerJames Morris <jmorris@namei.org>2008-11-14 10:39:16 +1100
commitb6dff3ec5e116e3af6f537d4caedcad6b9e5082a (patch)
tree9e76f972eb7ce9b84e0146c8e4126a3f86acb428 /mm/migrate.c
parent15a2460ed0af7538ca8e6c610fe607a2cd9da142 (diff)
CRED: Separate task security context from task_struct
Separate the task security context from task_struct. At this point, the security data is temporarily embedded in the task_struct with two pointers pointing to it. Note that the Alpha arch is altered as it refers to (E)UID and (E)GID in entry.S via asm-offsets. With comment fixes Signed-off-by: Marc Dionne <marc.c.dionne@gmail.com> 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>
Diffstat (limited to 'mm/migrate.c')
-rw-r--r--mm/migrate.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/mm/migrate.c b/mm/migrate.c
index 6263c24c4af..794443da1b4 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -1045,10 +1045,10 @@ asmlinkage long sys_move_pages(pid_t pid, unsigned long nr_pages,
const int __user *nodes,
int __user *status, int flags)
{
+ struct cred *cred, *tcred;
struct task_struct *task;
struct mm_struct *mm;
int err;
- uid_t uid, euid;
/* Check flags */
if (flags & ~(MPOL_MF_MOVE|MPOL_MF_MOVE_ALL))
@@ -1076,10 +1076,10 @@ asmlinkage long sys_move_pages(pid_t pid, unsigned long nr_pages,
* capabilities, superuser privileges or the same
* userid as the target process.
*/
- uid = current_uid();
- euid = current_euid();
- if (euid != task->suid && euid != task->uid &&
- uid != task->suid && uid != task->uid &&
+ cred = current->cred;
+ tcred = task->cred;
+ if (cred->euid != tcred->suid && cred->euid != tcred->uid &&
+ cred->uid != tcred->suid && cred->uid != tcred->uid &&
!capable(CAP_SYS_NICE)) {
err = -EPERM;
goto out;