diff options
Diffstat (limited to 'kernel/futex.c')
| -rw-r--r-- | kernel/futex.c | 27 |
1 files changed, 16 insertions, 11 deletions
diff --git a/kernel/futex.c b/kernel/futex.c index e45a65e4168..86b2600381b 100644 --- a/kernel/futex.c +++ b/kernel/futex.c @@ -53,6 +53,9 @@ #include <linux/signal.h> #include <linux/module.h> #include <linux/magic.h> +#include <linux/pid.h> +#include <linux/nsproxy.h> + #include <asm/futex.h> #include "rtmutex_common.h" @@ -443,7 +446,8 @@ static struct task_struct * futex_find_get_task(pid_t pid) struct task_struct *p; rcu_read_lock(); - p = find_task_by_pid(pid); + p = find_task_by_pid_ns(pid, + current->nsproxy->pid_ns); if (!p || ((current->euid != p->euid) && (current->euid != p->uid))) p = ERR_PTR(-ESRCH); @@ -653,7 +657,7 @@ static int wake_futex_pi(u32 __user *uaddr, u32 uval, struct futex_q *this) if (!(uval & FUTEX_OWNER_DIED)) { int ret = 0; - newval = FUTEX_WAITERS | new_owner->pid; + newval = FUTEX_WAITERS | task_pid_vnr(new_owner); curval = cmpxchg_futex_value_locked(uaddr, uval, newval); @@ -1106,7 +1110,7 @@ static void unqueue_me_pi(struct futex_q *q) static int fixup_pi_state_owner(u32 __user *uaddr, struct futex_q *q, struct task_struct *curr) { - u32 newtid = curr->pid | FUTEX_WAITERS; + u32 newtid = task_pid_vnr(curr) | FUTEX_WAITERS; struct futex_pi_state *pi_state = q->pi_state; u32 uval, curval, newval; int ret; @@ -1368,7 +1372,7 @@ static int futex_lock_pi(u32 __user *uaddr, struct rw_semaphore *fshared, * (by doing a 0 -> TID atomic cmpxchg), while holding all * the locks. It will most likely not succeed. */ - newval = current->pid; + newval = task_pid_vnr(current); curval = cmpxchg_futex_value_locked(uaddr, 0, newval); @@ -1379,7 +1383,7 @@ static int futex_lock_pi(u32 __user *uaddr, struct rw_semaphore *fshared, * Detect deadlocks. In case of REQUEUE_PI this is a valid * situation and we return success to user space. */ - if (unlikely((curval & FUTEX_TID_MASK) == current->pid)) { + if (unlikely((curval & FUTEX_TID_MASK) == task_pid_vnr(current))) { ret = -EDEADLK; goto out_unlock_release_sem; } @@ -1408,7 +1412,7 @@ static int futex_lock_pi(u32 __user *uaddr, struct rw_semaphore *fshared, */ if (unlikely(ownerdied || !(curval & FUTEX_TID_MASK))) { /* Keep the OWNER_DIED bit */ - newval = (curval & ~FUTEX_TID_MASK) | current->pid; + newval = (curval & ~FUTEX_TID_MASK) | task_pid_vnr(current); ownerdied = 0; lock_taken = 1; } @@ -1587,7 +1591,7 @@ retry: /* * We release only a lock we actually own: */ - if ((uval & FUTEX_TID_MASK) != current->pid) + if ((uval & FUTEX_TID_MASK) != task_pid_vnr(current)) return -EPERM; /* * First take all the futex related locks: @@ -1608,7 +1612,7 @@ retry_unlocked: * anyone else up: */ if (!(uval & FUTEX_OWNER_DIED)) - uval = cmpxchg_futex_value_locked(uaddr, current->pid, 0); + uval = cmpxchg_futex_value_locked(uaddr, task_pid_vnr(current), 0); if (unlikely(uval == -EFAULT)) @@ -1617,7 +1621,7 @@ retry_unlocked: * Rare case: we managed to release the lock atomically, * no need to wake anyone else up: */ - if (unlikely(uval == current->pid)) + if (unlikely(uval == task_pid_vnr(current))) goto out_unlock; /* @@ -1854,7 +1858,8 @@ sys_get_robust_list(int pid, struct robust_list_head __user * __user *head_ptr, ret = -ESRCH; rcu_read_lock(); - p = find_task_by_pid(pid); + p = find_task_by_pid_ns(pid, + current->nsproxy->pid_ns); if (!p) goto err_unlock; ret = -EPERM; @@ -1887,7 +1892,7 @@ retry: if (get_user(uval, uaddr)) return -1; - if ((uval & FUTEX_TID_MASK) == curr->pid) { + if ((uval & FUTEX_TID_MASK) == task_pid_vnr(curr)) { /* * Ok, this dying thread is truly holding a futex * of interest. Set the OWNER_DIED bit atomically |