diff options
| author | Wang Qing <wangqing@vivo.com> | 2021-03-01 20:05:48 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-04-28 12:07:14 +0200 |
| commit | bb3162b9f700d4b87563af4599418c74e0308412 (patch) | |
| tree | bad94a41c732bd514720c9ba13155997ef022943 /arch | |
| parent | 4c25714248065b813bf072733e9b6d9f6c819ae0 (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')
| -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 d347bbc086fe..16cdb471d3db 100644 --- a/arch/arc/kernel/signal.c +++ b/arch/arc/kernel/signal.c @@ -97,7 +97,7 @@ 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) @@ -111,7 +111,7 @@ 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; |