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arc: kernel: Return -EFAULT if copy_to_user() fails
[ Upstream commit 46e152186c
]
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>
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parent
d0a2b1d290
commit
604173ba57
1 changed files with 2 additions and 2 deletions
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@ -99,7 +99,7 @@ stash_usr_regs(struct rt_sigframe __user *sf, struct pt_regs *regs,
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sizeof(sf->uc.uc_mcontext.regs.scratch));
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err |= __copy_to_user(&sf->uc.uc_sigmask, set, sizeof(sigset_t));
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return err;
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return err ? -EFAULT : 0;
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}
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static int restore_usr_regs(struct pt_regs *regs, struct rt_sigframe __user *sf)
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@ -113,7 +113,7 @@ static int restore_usr_regs(struct pt_regs *regs, struct rt_sigframe __user *sf)
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&(sf->uc.uc_mcontext.regs.scratch),
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sizeof(sf->uc.uc_mcontext.regs.scratch));
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if (err)
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return err;
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return -EFAULT;
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set_current_blocked(&set);
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regs->bta = uregs.scratch.bta;
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