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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/drivers/misc/sram-exec.c
..
..
@@ -1,7 +1,7 @@
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1
 /*
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  * SRAM protect-exec region helper functions
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  *
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- * Copyright (C) 2017 Texas Instruments Incorporated - http://www.ti.com/
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+ * Copyright (C) 2017 Texas Instruments Incorporated - https://www.ti.com/
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  *	Dave Gerlach
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  *
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  * This program is free software; you can redistribute it and/or modify
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..
@@ -85,6 +85,7 @@
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 	unsigned long base;
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 	int pages;
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 	void *dst_cpy;
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+	int ret;
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 	mutex_lock(&exec_pool_list_mutex);
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 	list_for_each_entry(p, &exec_pool_list, list) {
..
..
@@ -96,7 +97,7 @@
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 	if (!part)
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 		return NULL;
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-	if (!addr_in_gen_pool(pool, (unsigned long)dst, size))
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+	if (!gen_pool_has_addr(pool, (unsigned long)dst, size))
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 		return NULL;
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102
 
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 	base = (unsigned long)part->base;
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@@ -104,16 +105,28 @@
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 	mutex_lock(&part->lock);
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107
 
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-	set_memory_nx((unsigned long)base, pages);
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-	set_memory_rw((unsigned long)base, pages);
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+	ret = set_memory_nx((unsigned long)base, pages);
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+	if (ret)
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+		goto error_out;
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+	ret = set_memory_rw((unsigned long)base, pages);
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+	if (ret)
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+		goto error_out;
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114
 
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 	dst_cpy = fncpy(dst, src, size);
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116
 
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-	set_memory_ro((unsigned long)base, pages);
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-	set_memory_x((unsigned long)base, pages);
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+	ret = set_memory_ro((unsigned long)base, pages);
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+	if (ret)
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+		goto error_out;
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+	ret = set_memory_x((unsigned long)base, pages);
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+	if (ret)
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+		goto error_out;
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123
 
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 	mutex_unlock(&part->lock);
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125
 
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 	return dst_cpy;
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+
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+error_out:
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+	mutex_unlock(&part->lock);
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+	return NULL;
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 }
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 EXPORT_SYMBOL_GPL(sram_exec_copy);