diff options
| author | David Howells <dhowells@redhat.com> | 2008-11-14 02:39:12 +0300 |
|---|---|---|
| committer | James Morris <jmorris@namei.org> | 2008-11-14 02:39:12 +0300 |
| commit | 76aac0e9a17742e60d408be1a706e9aaad370891 (patch) | |
| tree | e873a000d9c96209726e0958e311f005c13b2ed5 /kernel/futex_compat.c | |
| parent | b103c59883f1ec6e4d548b25054608cb5724453c (diff) | |
| download | linux-76aac0e9a17742e60d408be1a706e9aaad370891.tar.xz | |
CRED: Wrap task credential accesses in the core kernel
Wrap access to task credentials so that they can be separated more easily from
the task_struct during the introduction of COW creds.
Change most current->(|e|s|fs)[ug]id to current_(|e|s|fs)[ug]id().
Change some task->e?[ug]id to task_e?[ug]id(). In some places it makes more
sense to use RCU directly rather than a convenient wrapper; these will be
addressed by later patches.
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: James Morris <jmorris@namei.org>
Acked-by: Serge Hallyn <serue@us.ibm.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: linux-audit@redhat.com
Cc: containers@lists.linux-foundation.org
Cc: linux-mm@kvack.org
Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'kernel/futex_compat.c')
| -rw-r--r-- | kernel/futex_compat.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/futex_compat.c b/kernel/futex_compat.c index 04ac3a9e42cf..3254d4e41e88 100644 --- a/kernel/futex_compat.c +++ b/kernel/futex_compat.c @@ -135,6 +135,7 @@ compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr, { struct compat_robust_list_head __user *head; unsigned long ret; + uid_t euid = current_euid(); if (!futex_cmpxchg_enabled) return -ENOSYS; @@ -150,7 +151,7 @@ compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr, if (!p) goto err_unlock; ret = -EPERM; - if ((current->euid != p->euid) && (current->euid != p->uid) && + if (euid != p->euid && euid != p->uid && !capable(CAP_SYS_PTRACE)) goto err_unlock; head = p->compat_robust_list; |