metag: copy_from_user() should zero the destination on access_ok() failure
Cc: stable@vger.kernel.org Acked-by: James Hogan <james.hogan@imgtec.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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@ -204,8 +204,9 @@ extern unsigned long __must_check __copy_user_zeroing(void *to,
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static inline unsigned long
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copy_from_user(void *to, const void __user *from, unsigned long n)
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{
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if (access_ok(VERIFY_READ, from, n))
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if (likely(access_ok(VERIFY_READ, from, n)))
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return __copy_user_zeroing(to, from, n);
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memset(to, 0, n);
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return n;
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}
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