X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=kernel%2Ffork.c;h=7ec6e9939b2c97c0ee62ec8cfdf05fd74bc4f4e7;hb=cc9f3098e1a560830e0a0c15825486d8a5f3afae;hp=f97f2c449f5cf556ea6c54cb4aec6e894dd8bab5;hpb=3e5050e60e3b51e32940926ccb4aa5965f618306;p=firefly-linux-kernel-4.4.55.git

diff --git a/kernel/fork.c b/kernel/fork.c
index f97f2c449f5c..7ec6e9939b2c 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -380,6 +380,7 @@ static struct task_struct *dup_task_struct(struct task_struct *orig)
 #endif
 	tsk->splice_pipe = NULL;
 	tsk->task_frag.page = NULL;
+	tsk->wake_q.next = NULL;
 
 	account_kernel_stack(ti, 1);
 
@@ -799,7 +800,8 @@ struct mm_struct *mm_access(struct task_struct *task, unsigned int mode)
 
 	mm = get_task_mm(task);
 	if (mm && mm != current->mm &&
-			!ptrace_may_access(task, mode)) {
+			!ptrace_may_access(task, mode) &&
+			!capable(CAP_SYS_RESOURCE)) {
 		mmput(mm);
 		mm = ERR_PTR(-EACCES);
 	}
@@ -1368,8 +1370,7 @@ static struct task_struct *copy_process(unsigned long clone_flags,
 	p->real_start_time = ktime_get_boot_ns();
 	p->io_context = NULL;
 	p->audit_context = NULL;
-	if (clone_flags & CLONE_THREAD)
-		threadgroup_change_begin(current);
+	threadgroup_change_begin(current);
 	cgroup_fork(p);
 #ifdef CONFIG_NUMA
 	p->mempolicy = mpol_dup(p->mempolicy);
@@ -1610,8 +1611,7 @@ static struct task_struct *copy_process(unsigned long clone_flags,
 
 	proc_fork_connector(p);
 	cgroup_post_fork(p, cgrp_ss_priv);
-	if (clone_flags & CLONE_THREAD)
-		threadgroup_change_end(current);
+	threadgroup_change_end(current);
 	perf_event_fork(p);
 
 	trace_task_newtask(p, clone_flags);
@@ -1652,8 +1652,7 @@ bad_fork_cleanup_policy:
 	mpol_put(p->mempolicy);
 bad_fork_cleanup_threadgroup_lock:
 #endif
-	if (clone_flags & CLONE_THREAD)
-		threadgroup_change_end(current);
+	threadgroup_change_end(current);
 	delayacct_tsk_free(p);
 bad_fork_cleanup_count:
 	atomic_dec(&p->cred->user->processes);