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-rw-r--r--arch/x86/kernel/module.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/x86/kernel/module.c b/arch/x86/kernel/module.c
index 49483137371f..e69f9882bf95 100644
--- a/arch/x86/kernel/module.c
+++ b/arch/x86/kernel/module.c
@@ -48,6 +48,9 @@ do { \
48static unsigned long module_load_offset; 48static unsigned long module_load_offset;
49static int randomize_modules = 1; 49static int randomize_modules = 1;
50 50
51/* Mutex protects the module_load_offset. */
52static DEFINE_MUTEX(module_kaslr_mutex);
53
51static int __init parse_nokaslr(char *p) 54static int __init parse_nokaslr(char *p)
52{ 55{
53 randomize_modules = 0; 56 randomize_modules = 0;
@@ -58,7 +61,7 @@ early_param("nokaslr", parse_nokaslr);
58static unsigned long int get_module_load_offset(void) 61static unsigned long int get_module_load_offset(void)
59{ 62{
60 if (randomize_modules) { 63 if (randomize_modules) {
61 mutex_lock(&module_mutex); 64 mutex_lock(&module_kaslr_mutex);
62 /* 65 /*
63 * Calculate the module_load_offset the first time this 66 * Calculate the module_load_offset the first time this
64 * code is called. Once calculated it stays the same until 67 * code is called. Once calculated it stays the same until
@@ -67,7 +70,7 @@ static unsigned long int get_module_load_offset(void)
67 if (module_load_offset == 0) 70 if (module_load_offset == 0)
68 module_load_offset = 71 module_load_offset =
69 (get_random_int() % 1024 + 1) * PAGE_SIZE; 72 (get_random_int() % 1024 + 1) * PAGE_SIZE;
70 mutex_unlock(&module_mutex); 73 mutex_unlock(&module_kaslr_mutex);
71 } 74 }
72 return module_load_offset; 75 return module_load_offset;
73} 76}