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| author | Ingo Molnar <mingo@elte.hu> | 2008-12-29 13:09:40 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-12-29 13:09:40 +0100 |
| commit | 75329f1f0c0e2e2ad611734a2ef08309391a4d9f (patch) | |
| tree | 67ca1a13f51fbf2f5af8557e6ff0bb722efab3e6 /mm/mempolicy.c | |
| parent | b6b301aa9fba57b114c3a00f5f43abf672bd4ecd (diff) | |
| parent | 3c92ec8ae91ecf59d88c798301833d7cf83f2179 (diff) | |
Merge branch 'linus' into x86/cleanups
Diffstat (limited to 'mm/mempolicy.c')
| -rw-r--r-- | mm/mempolicy.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/mm/mempolicy.c b/mm/mempolicy.c index e9493b1c1117..e412ffa8e52e 100644 --- a/mm/mempolicy.c +++ b/mm/mempolicy.c @@ -1114,6 +1114,7 @@ asmlinkage long sys_migrate_pages(pid_t pid, unsigned long maxnode, const unsigned long __user *old_nodes, const unsigned long __user *new_nodes) { + const struct cred *cred = current_cred(), *tcred; struct mm_struct *mm; struct task_struct *task; nodemask_t old; @@ -1148,12 +1149,16 @@ asmlinkage long sys_migrate_pages(pid_t pid, unsigned long maxnode, * capabilities, superuser privileges or the same * userid as the target process. */ - if ((current->euid != task->suid) && (current->euid != task->uid) && - (current->uid != task->suid) && (current->uid != task->uid) && + rcu_read_lock(); + tcred = __task_cred(task); + if (cred->euid != tcred->suid && cred->euid != tcred->uid && + cred->uid != tcred->suid && cred->uid != tcred->uid && !capable(CAP_SYS_NICE)) { + rcu_read_unlock(); err = -EPERM; goto out; } + rcu_read_unlock(); task_nodes = cpuset_mems_allowed(task); /* Is the user allowed to access the target nodes? */ |