diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/futex.c | 38 | ||||
| -rw-r--r-- | kernel/futex_compat.c | 38 | ||||
| -rw-r--r-- | kernel/irq/handle.c | 16 | ||||
| -rw-r--r-- | kernel/irq/manage.c | 19 | ||||
| -rw-r--r-- | kernel/irq/migration.c | 10 |
5 files changed, 60 insertions, 61 deletions
diff --git a/kernel/futex.c b/kernel/futex.c index 72efa1e4359..e2b0fb9a0b3 100644 --- a/kernel/futex.c +++ b/kernel/futex.c @@ -59,6 +59,7 @@ #include <linux/magic.h> #include <linux/pid.h> #include <linux/nsproxy.h> +#include <linux/ptrace.h> #include <asm/futex.h> @@ -2443,40 +2444,31 @@ SYSCALL_DEFINE3(get_robust_list, int, pid, { struct robust_list_head __user *head; unsigned long ret; - const struct cred *cred = current_cred(), *pcred; + struct task_struct *p; if (!futex_cmpxchg_enabled) return -ENOSYS; + WARN_ONCE(1, "deprecated: get_robust_list will be deleted in 2013.\n"); + + rcu_read_lock(); + + ret = -ESRCH; if (!pid) - head = current->robust_list; + p = current; else { - struct task_struct *p; - - ret = -ESRCH; - rcu_read_lock(); p = find_task_by_vpid(pid); if (!p) goto err_unlock; - ret = -EPERM; - pcred = __task_cred(p); - /* If victim is in different user_ns, then uids are not - comparable, so we must have CAP_SYS_PTRACE */ - if (cred->user->user_ns != pcred->user->user_ns) { - if (!ns_capable(pcred->user->user_ns, CAP_SYS_PTRACE)) - goto err_unlock; - goto ok; - } - /* If victim is in same user_ns, then uids are comparable */ - if (cred->euid != pcred->euid && - cred->euid != pcred->uid && - !ns_capable(pcred->user->user_ns, CAP_SYS_PTRACE)) - goto err_unlock; -ok: - head = p->robust_list; - rcu_read_unlock(); } + ret = -EPERM; + if (!ptrace_may_access(p, PTRACE_MODE_READ)) + goto err_unlock; + + head = p->robust_list; + rcu_read_unlock(); + if (put_user(sizeof(*head), len_ptr)) return -EFAULT; return put_user(head, head_ptr); diff --git a/kernel/futex_compat.c b/kernel/futex_compat.c index 5f9e689dc8f..83e368b005f 100644 --- a/kernel/futex_compat.c +++ b/kernel/futex_compat.c @@ -10,6 +10,7 @@ #include <linux/compat.h> #include <linux/nsproxy.h> #include <linux/futex.h> +#include <linux/ptrace.h> #include <asm/uaccess.h> @@ -136,40 +137,31 @@ compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr, { struct compat_robust_list_head __user *head; unsigned long ret; - const struct cred *cred = current_cred(), *pcred; + struct task_struct *p; if (!futex_cmpxchg_enabled) return -ENOSYS; + WARN_ONCE(1, "deprecated: get_robust_list will be deleted in 2013.\n"); + + rcu_read_lock(); + + ret = -ESRCH; if (!pid) - head = current->compat_robust_list; + p = current; else { - struct task_struct *p; - - ret = -ESRCH; - rcu_read_lock(); p = find_task_by_vpid(pid); if (!p) goto err_unlock; - ret = -EPERM; - pcred = __task_cred(p); - /* If victim is in different user_ns, then uids are not - comparable, so we must have CAP_SYS_PTRACE */ - if (cred->user->user_ns != pcred->user->user_ns) { - if (!ns_capable(pcred->user->user_ns, CAP_SYS_PTRACE)) - goto err_unlock; - goto ok; - } - /* If victim is in same user_ns, then uids are comparable */ - if (cred->euid != pcred->euid && - cred->euid != pcred->uid && - !ns_capable(pcred->user->user_ns, CAP_SYS_PTRACE)) - goto err_unlock; -ok: - head = p->compat_robust_list; - rcu_read_unlock(); } + ret = -EPERM; + if (!ptrace_may_access(p, PTRACE_MODE_READ)) + goto err_unlock; + + head = p->compat_robust_list; + rcu_read_unlock(); + if (put_user(sizeof(*head), len_ptr)) return -EFAULT; return put_user(ptr_to_compat(head), head_ptr); diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c index 6ff84e6a954..bdb18032555 100644 --- a/kernel/irq/handle.c +++ b/kernel/irq/handle.c @@ -54,14 +54,18 @@ static void warn_no_thread(unsigned int irq, struct irqaction *action) static void irq_wake_thread(struct irq_desc *desc, struct irqaction *action) { /* - * Wake up the handler thread for this action. In case the - * thread crashed and was killed we just pretend that we - * handled the interrupt. The hardirq handler has disabled the - * device interrupt, so no irq storm is lurking. If the + * In case the thread crashed and was killed we just pretend that + * we handled the interrupt. The hardirq handler has disabled the + * device interrupt, so no irq storm is lurking. + */ + if (action->thread->flags & PF_EXITING) + return; + + /* + * Wake up the handler thread for this action. If the * RUNTHREAD bit is already set, nothing to do. */ - if ((action->thread->flags & PF_EXITING) || - test_and_set_bit(IRQTF_RUNTHREAD, &action->thread_flags)) + if (test_and_set_bit(IRQTF_RUNTHREAD, &action->thread_flags)) return; /* diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index b0ccd1ac2d6..89a3ea82569 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -282,7 +282,7 @@ setup_affinity(unsigned int irq, struct irq_desc *desc, struct cpumask *mask) { struct irq_chip *chip = irq_desc_get_chip(desc); struct cpumask *set = irq_default_affinity; - int ret; + int ret, node = desc->irq_data.node; /* Excludes PER_CPU and NO_BALANCE interrupts */ if (!irq_can_set_affinity(irq)) @@ -301,6 +301,13 @@ setup_affinity(unsigned int irq, struct irq_desc *desc, struct cpumask *mask) } cpumask_and(mask, cpu_online_mask, set); + if (node != NUMA_NO_NODE) { + const struct cpumask *nodemask = cpumask_of_node(node); + + /* make sure at least one of the cpus in nodemask is online */ + if (cpumask_intersects(mask, nodemask)) + cpumask_and(mask, mask, nodemask); + } ret = chip->irq_set_affinity(&desc->irq_data, mask, false); switch (ret) { case IRQ_SET_MASK_OK: @@ -645,7 +652,7 @@ static int irq_wait_for_interrupt(struct irqaction *action) * is marked MASKED. */ static void irq_finalize_oneshot(struct irq_desc *desc, - struct irqaction *action, bool force) + struct irqaction *action) { if (!(desc->istate & IRQS_ONESHOT)) return; @@ -679,7 +686,7 @@ again: * we would clear the threads_oneshot bit of this thread which * was just set. */ - if (!force && test_bit(IRQTF_RUNTHREAD, &action->thread_flags)) + if (test_bit(IRQTF_RUNTHREAD, &action->thread_flags)) goto out_unlock; desc->threads_oneshot &= ~action->thread_mask; @@ -739,7 +746,7 @@ irq_forced_thread_fn(struct irq_desc *desc, struct irqaction *action) local_bh_disable(); ret = action->thread_fn(action->irq, action->dev_id); - irq_finalize_oneshot(desc, action, false); + irq_finalize_oneshot(desc, action); local_bh_enable(); return ret; } @@ -755,7 +762,7 @@ static irqreturn_t irq_thread_fn(struct irq_desc *desc, irqreturn_t ret; ret = action->thread_fn(action->irq, action->dev_id); - irq_finalize_oneshot(desc, action, false); + irq_finalize_oneshot(desc, action); return ret; } @@ -844,7 +851,7 @@ void exit_irq_thread(void) wake_threads_waitq(desc); /* Prevent a stale desc->threads_oneshot */ - irq_finalize_oneshot(desc, action, true); + irq_finalize_oneshot(desc, action); } static void irq_setup_forced_threading(struct irqaction *new) diff --git a/kernel/irq/migration.c b/kernel/irq/migration.c index 47420908fba..c3c89751b32 100644 --- a/kernel/irq/migration.c +++ b/kernel/irq/migration.c @@ -43,12 +43,16 @@ void irq_move_masked_irq(struct irq_data *idata) * masking the irqs. */ if (likely(cpumask_any_and(desc->pending_mask, cpu_online_mask) - < nr_cpu_ids)) - if (!chip->irq_set_affinity(&desc->irq_data, - desc->pending_mask, false)) { + < nr_cpu_ids)) { + int ret = chip->irq_set_affinity(&desc->irq_data, + desc->pending_mask, false); + switch (ret) { + case IRQ_SET_MASK_OK: cpumask_copy(desc->irq_data.affinity, desc->pending_mask); + case IRQ_SET_MASK_OK_NOCOPY: irq_set_thread_affinity(desc); } + } cpumask_clear(desc->pending_mask); } |