Merge branch 'for-3.5/core' of git://git.kernel.dk/linux-block

[linux-2.6-block.git] / fs / ioprio.c

diff --git a/fs/ioprio.c b/fs/ioprio.c
index 48644373de58a2c5c16524579734d075db105f09..e50170ca7c33f446acc16e29a0d0097828919c30 100644 (file)
--- a/fs/ioprio.c
+++ b/fs/ioprio.c
@@ -37,8 +37,8 @@ int set_task_ioprio(struct task_struct *task, int ioprio)
 
        rcu_read_lock();
        tcred = __task_cred(task);
-       if (tcred->uid != cred->euid &&
-           tcred->uid != cred->uid && !capable(CAP_SYS_NICE)) {
+       if (!uid_eq(tcred->uid, cred->euid) &&
+           !uid_eq(tcred->uid, cred->uid) && !capable(CAP_SYS_NICE)) {
                rcu_read_unlock();
                return -EPERM;
        }
@@ -65,6 +65,7 @@ SYSCALL_DEFINE3(ioprio_set, int, which, int, who, int, ioprio)
        struct task_struct *p, *g;
        struct user_struct *user;
        struct pid *pgrp;
+       kuid_t uid;
        int ret;
 
        switch (class) {
@@ -110,16 +111,19 @@ SYSCALL_DEFINE3(ioprio_set, int, which, int, who, int, ioprio)
                        } while_each_pid_thread(pgrp, PIDTYPE_PGID, p);
                        break;
                case IOPRIO_WHO_USER:
+                       uid = make_kuid(current_user_ns(), who);
+                       if (!uid_valid(uid))
+                               break;
                        if (!who)
                                user = current_user();
                        else
-                               user = find_user(who);
+                               user = find_user(uid);
 
                        if (!user)
                                break;
 
                        do_each_thread(g, p) {
-                               if (__task_cred(p)->uid != who)
+                               if (!uid_eq(task_uid(p), uid))
                                        continue;
                                ret = set_task_ioprio(p, ioprio);
                                if (ret)
@@ -174,6 +178,7 @@ SYSCALL_DEFINE2(ioprio_get, int, which, int, who)
        struct task_struct *g, *p;
        struct user_struct *user;
        struct pid *pgrp;
+       kuid_t uid;
        int ret = -ESRCH;
        int tmpio;
 
@@ -203,16 +208,17 @@ SYSCALL_DEFINE2(ioprio_get, int, which, int, who)
                        } while_each_pid_thread(pgrp, PIDTYPE_PGID, p);
                        break;
                case IOPRIO_WHO_USER:
+                       uid = make_kuid(current_user_ns(), who);
                        if (!who)
                                user = current_user();
                        else
-                               user = find_user(who);
+                               user = find_user(uid);
 
                        if (!user)
                                break;
 
                        do_each_thread(g, p) {
-                               if (__task_cred(p)->uid != user->uid)
+                               if (!uid_eq(task_uid(p), user->uid))
                                        continue;
                                tmpio = get_task_ioprio(p);
                                if (tmpio < 0)