diff options
Diffstat (limited to 'kernel/fork.c')
| -rw-r--r-- | kernel/fork.c | 36 |
1 files changed, 31 insertions, 5 deletions
diff --git a/kernel/fork.c b/kernel/fork.c index 26a7a6707fa7..b9372a0bff18 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -193,6 +193,7 @@ void __put_task_struct(struct task_struct *tsk) WARN_ON(atomic_read(&tsk->usage)); WARN_ON(tsk == current); + security_task_free(tsk); exit_creds(tsk); delayacct_tsk_free(tsk); put_signal_struct(tsk->signal); @@ -355,7 +356,7 @@ static int dup_mmap(struct mm_struct *mm, struct mm_struct *oldmm) charge = 0; if (mpnt->vm_flags & VM_ACCOUNT) { unsigned int len = (mpnt->vm_end - mpnt->vm_start) >> PAGE_SHIFT; - if (security_vm_enough_memory(len)) + if (security_vm_enough_memory_mm(oldmm, len)) /* sic */ goto fail_nomem; charge = len; } @@ -511,6 +512,23 @@ static struct mm_struct *mm_init(struct mm_struct *mm, struct task_struct *p) return NULL; } +static void check_mm(struct mm_struct *mm) +{ + int i; + + for (i = 0; i < NR_MM_COUNTERS; i++) { + long x = atomic_long_read(&mm->rss_stat.count[i]); + + if (unlikely(x)) + printk(KERN_ALERT "BUG: Bad rss-counter state " + "mm:%p idx:%d val:%ld\n", mm, i, x); + } + +#ifdef CONFIG_TRANSPARENT_HUGEPAGE + VM_BUG_ON(mm->pmd_huge_pte); +#endif +} + /* * Allocate and initialize an mm_struct. */ @@ -538,9 +556,7 @@ void __mmdrop(struct mm_struct *mm) mm_free_pgd(mm); destroy_context(mm); mmu_notifier_mm_destroy(mm); -#ifdef CONFIG_TRANSPARENT_HUGEPAGE - VM_BUG_ON(mm->pmd_huge_pte); -#endif + check_mm(mm); free_mm(mm); } EXPORT_SYMBOL_GPL(__mmdrop); @@ -1035,6 +1051,9 @@ static int copy_signal(unsigned long clone_flags, struct task_struct *tsk) sig->oom_score_adj = current->signal->oom_score_adj; sig->oom_score_adj_min = current->signal->oom_score_adj_min; + sig->has_child_subreaper = current->signal->has_child_subreaper || + current->signal->is_child_subreaper; + mutex_init(&sig->cred_guard_mutex); return 0; @@ -1222,6 +1241,7 @@ static struct task_struct *copy_process(unsigned long clone_flags, #ifdef CONFIG_CPUSETS p->cpuset_mem_spread_rotor = NUMA_NO_NODE; p->cpuset_slab_spread_rotor = NUMA_NO_NODE; + seqcount_init(&p->mems_allowed_seq); #endif #ifdef CONFIG_TRACE_IRQFLAGS p->irq_events = 0; @@ -1340,7 +1360,13 @@ static struct task_struct *copy_process(unsigned long clone_flags, clear_all_latency_tracing(p); /* ok, now we should be set up.. */ - p->exit_signal = (clone_flags & CLONE_THREAD) ? -1 : (clone_flags & CSIGNAL); + if (clone_flags & CLONE_THREAD) + p->exit_signal = -1; + else if (clone_flags & CLONE_PARENT) + p->exit_signal = current->group_leader->exit_signal; + else + p->exit_signal = (clone_flags & CSIGNAL); + p->pdeath_signal = 0; p->exit_state = 0; |