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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/arch/microblaze/include/asm/futex.h
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@@ -34,7 +34,8 @@
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 {
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 	int oldval = 0, ret;
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-	pagefault_disable();
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+	if (!access_ok(uaddr, sizeof(u32)))
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+		return -EFAULT;
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 	switch (op) {
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 	case FUTEX_OP_SET:
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@@ -56,8 +57,6 @@
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 		ret = -ENOSYS;
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 	}
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-	pagefault_enable();
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-
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 	if (!ret)
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 		*oval = oldval;
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@@ -71,7 +70,7 @@
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 	int ret = 0, cmp;
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 	u32 prev;
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-	if (!access_ok(VERIFY_WRITE, uaddr, sizeof(u32)))
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+	if (!access_ok(uaddr, sizeof(u32)))
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 		return -EFAULT;
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 	__asm__ __volatile__ ("1:	lwx	%1, %3, r0;		\