Commit 46e15218 authored by Wang Qing's avatar Wang Qing Committed by Vineet Gupta
Browse files

arc: kernel: Return -EFAULT if copy_to_user() fails 



The copy_to_user() function returns the number of bytes remaining to be
copied, but we want to return -EFAULT if the copy doesn't complete.

Signed-off-by: default avatarWang Qing <wangqing@vivo.com>
Signed-off-by: default avatarVineet Gupta <vgupta@synopsys.com>
parent fac24521

arch/arc/kernel/signal.c

+2 −2
Original line number Diff line number Diff line
@@ -96,7 +96,7 @@ stash_usr_regs(struct rt_sigframe __user *sf, struct pt_regs *regs, 
			     sizeof(sf->uc.uc_mcontext.regs.scratch));

	err |= __copy_to_user(&sf->uc.uc_sigmask, set, sizeof(sigset_t));



	return err;

	return err ? -EFAULT : 0;

}



static int restore_usr_regs(struct pt_regs *regs, struct rt_sigframe __user *sf)
@@ -110,7 +110,7 @@ static int restore_usr_regs(struct pt_regs *regs, struct rt_sigframe __user *sf) 
				&(sf->uc.uc_mcontext.regs.scratch),

				sizeof(sf->uc.uc_mcontext.regs.scratch));

	if (err)

		return err;

		return -EFAULT;



	set_current_blocked(&set);

	regs->bta	= uregs.scratch.bta;