commit 9ac08002130b591d0f2ee035aa9062f84f2f15cb
author Al Viro <viro@zeniv.linux.org.uk> Sun Oct 21 15:56:52 2012 -0400
committer Al Viro <viro@zeniv.linux.org.uk> Wed Nov 28 22:36:33 2012 -0500
tree 35262e61fafefd6279eb39b2b45c4de5ee2166a2
parent b9763ce33fff6b37e1f2e2effb14fb25e67a68f2

arm64: sanitize copy_thread(), switch to generic fork/vfork/clone

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

arch/arm64/kernel/process.c

diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c
index 8a5f334..5a1335c 100644
--- a/arch/arm64/kernel/process.c
+++ b/arch/arm64/kernel/process.c
@@ -235,15 +235,15 @@
 
 int copy_thread(unsigned long clone_flags, unsigned long stack_start,
 		unsigned long stk_sz, struct task_struct *p,
-		struct pt_regs *regs)
+		struct pt_regs *unused)
 {
 	struct pt_regs *childregs = task_pt_regs(p);
 	unsigned long tls = p->thread.tp_value;
 
 	memset(&p->thread.cpu_context, 0, sizeof(struct cpu_context));
 
-	if (likely(regs)) {
-		*childregs = *regs;
+	if (likely(!(p->flags & PF_KTHREAD))) {
+		*childregs = *current_pt_regs();
 		childregs->regs[0] = 0;
 		if (is_compat_thread(task_thread_info(p))) {
 			if (stack_start)
@@ -266,7 +266,7 @@
 		 * for the new thread.
 		 */
 		if (clone_flags & CLONE_SETTLS)
-			tls = regs->regs[3];
+			tls = childregs->regs[3];
 	} else {
 		memset(childregs, 0, sizeof(struct pt_regs));
 		childregs->pstate = PSR_MODE_EL1h;