From: Vineet Gupta <vgupta@synopsys.com> To: Wang Qing <wangqing@vivo.com>, Jens Axboe <axboe@kernel.dk>, Thomas Gleixner <tglx@linutronix.de>, "Gustavo A. R. Silva" <gustavoars@kernel.org>, linux-snps-arc@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] arc: kernel: Return -EFAULT if copy_to_user() fails Date: Tue, 2 Mar 2021 11:01:11 -0800 [thread overview] Message-ID: <bed81c02-97e0-9905-0dd3-6064a54691ff@synopsys.com> (raw) In-Reply-To: <1614600349-15662-1-git-send-email-wangqing@vivo.com> On 3/1/21 4:05 AM, Wang Qing wrote: > 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 <wangqing@vivo.com> Acked-by: Vineet Gupta <vgupta@synopsys.com> Do you want me to pick this up via ARC tree ? Thx, -Vineet > --- > arch/arc/kernel/signal.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/arch/arc/kernel/signal.c b/arch/arc/kernel/signal.c > index a78d8f7..fdbe06c > --- 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; >
WARNING: multiple messages have this Message-ID (diff)
From: Vineet Gupta <vgupta@synopsys.com> To: Wang Qing <wangqing@vivo.com>, Jens Axboe <axboe@kernel.dk>, Thomas Gleixner <tglx@linutronix.de>, "Gustavo A. R. Silva" <gustavoars@kernel.org>, linux-snps-arc@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] arc: kernel: Return -EFAULT if copy_to_user() fails Date: Tue, 2 Mar 2021 11:01:11 -0800 [thread overview] Message-ID: <bed81c02-97e0-9905-0dd3-6064a54691ff@synopsys.com> (raw) In-Reply-To: <1614600349-15662-1-git-send-email-wangqing@vivo.com> On 3/1/21 4:05 AM, Wang Qing wrote: > 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 <wangqing@vivo.com> Acked-by: Vineet Gupta <vgupta@synopsys.com> Do you want me to pick this up via ARC tree ? Thx, -Vineet > --- > arch/arc/kernel/signal.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/arch/arc/kernel/signal.c b/arch/arc/kernel/signal.c > index a78d8f7..fdbe06c > --- 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; > _______________________________________________ linux-snps-arc mailing list linux-snps-arc@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-snps-arc
next prev parent reply other threads:[~2021-03-02 22:08 UTC|newest] Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-03-01 12:05 [PATCH] arc: kernel: Return -EFAULT if copy_to_user() fails Wang Qing 2021-03-01 12:05 ` Wang Qing 2021-03-02 19:01 ` Vineet Gupta [this message] 2021-03-02 19:01 ` Vineet Gupta 2021-03-10 2:41 ` 王擎
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