From: Wang Qing Date: Mon, 1 Mar 2021 12:05:48 +0000 (+0800) Subject: arc: kernel: Return -EFAULT if copy_to_user() fails X-Git-Tag: v5.12-rc7~30^2~1 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=46e152186cd89d940b26726fff11eb3f4935b45a;p=thirdparty%2Flinux.git 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: Wang Qing Signed-off-by: Vineet Gupta --- diff --git a/arch/arc/kernel/signal.c b/arch/arc/kernel/signal.c index a78d8f745a678..fdbe06c98895e 100644 --- a/arch/arc/kernel/signal.c +++ b/arch/arc/kernel/signal.c @@ -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;