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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/arch/arc/include/asm/futex.h
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@@ -1,9 +1,6 @@
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+/* SPDX-License-Identifier: GPL-2.0-only */
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 /*
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  * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License version 2 as
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- * published by the Free Software Foundation.
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  *
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  * Vineetg: August 2010: From Android kernel work
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  */
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@@ -78,10 +75,12 @@
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 {
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 	int oldval = 0, ret;
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+	if (!access_ok(uaddr, sizeof(u32)))
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+		return -EFAULT;
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+
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 #ifndef CONFIG_ARC_HAS_LLSC
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 	preempt_disable();	/* to guarantee atomic r-m-w of futex op */
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 #endif
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-	pagefault_disable();
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 	switch (op) {
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 	case FUTEX_OP_SET:
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@@ -104,7 +103,6 @@
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 		ret = -ENOSYS;
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 	}
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-	pagefault_enable();
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 #ifndef CONFIG_ARC_HAS_LLSC
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 	preempt_enable();
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 #endif
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@@ -126,7 +124,7 @@
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 	int ret = 0;
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 	u32 existval;
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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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 #ifndef CONFIG_ARC_HAS_LLSC