diff options
Diffstat (limited to 'arch/s390/kernel/module.c')
| -rw-r--r-- | arch/s390/kernel/module.c | 54 |
1 files changed, 22 insertions, 32 deletions
diff --git a/arch/s390/kernel/module.c b/arch/s390/kernel/module.c index ac97a905e8cd..7fee64fdc1bb 100644 --- a/arch/s390/kernel/module.c +++ b/arch/s390/kernel/module.c @@ -37,41 +37,31 @@ #define PLT_ENTRY_SIZE 22 -static unsigned long get_module_load_offset(void) +static struct execmem_info execmem_info __ro_after_init; + +struct execmem_info __init *execmem_arch_setup(void) { - static DEFINE_MUTEX(module_kaslr_mutex); - static unsigned long module_load_offset; - - if (!kaslr_enabled()) - return 0; - /* - * Calculate the module_load_offset the first time this code - * is called. Once calculated it stays the same until reboot. - */ - mutex_lock(&module_kaslr_mutex); - if (!module_load_offset) + unsigned long module_load_offset = 0; + unsigned long start; + + if (kaslr_enabled()) module_load_offset = get_random_u32_inclusive(1, 1024) * PAGE_SIZE; - mutex_unlock(&module_kaslr_mutex); - return module_load_offset; -} -void *module_alloc(unsigned long size) -{ - gfp_t gfp_mask = GFP_KERNEL; - void *p; - - if (PAGE_ALIGN(size) > MODULES_LEN) - return NULL; - p = __vmalloc_node_range(size, MODULE_ALIGN, - MODULES_VADDR + get_module_load_offset(), - MODULES_END, gfp_mask, PAGE_KERNEL, - VM_FLUSH_RESET_PERMS | VM_DEFER_KMEMLEAK, - NUMA_NO_NODE, __builtin_return_address(0)); - if (p && (kasan_alloc_module_shadow(p, size, gfp_mask) < 0)) { - vfree(p); - return NULL; - } - return p; + start = MODULES_VADDR + module_load_offset; + + execmem_info = (struct execmem_info){ + .ranges = { + [EXECMEM_DEFAULT] = { + .flags = EXECMEM_KASAN_SHADOW, + .start = start, + .end = MODULES_END, + .pgprot = PAGE_KERNEL, + .alignment = MODULE_ALIGN, + }, + }, + }; + + return &execmem_info; } #ifdef CONFIG_FUNCTION_TRACER |