diff options
| author | Wang Qing <wangqing@vivo.com> | 2021-03-01 20:05:48 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-04-21 13:00:51 +0200 |
| commit | b448a6a2fc5aa7c36403ebfb2dcbf767d3b01eb4 (patch) | |
| tree | 7cef8b931e61b264e913541c7f73ed1b0d978ff2 /arch/arc | |
| parent | f12e8cf6b18013146741e5075983726f7a00903b (diff) | |
arc: kernel: Return -EFAULT if copy_to_user() fails
[ Upstream commit 46e152186cd89d940b26726fff11eb3f4935b45a ]
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>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'arch/arc')
| -rw-r--r-- | arch/arc/kernel/signal.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/arc/kernel/signal.c b/arch/arc/kernel/signal.c index 2be55fb96d87..98e575dbcce5 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; |