module.c (7ae9fb1b7ecbb5d85d07857943f677fd1a559b18) module.c (8339f7d8e178d9c933f437d14be0a5fd1359f53d)
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * AArch64 loadable module support.
4 *
5 * Copyright (C) 2012 ARM Limited
6 *
7 * Author: Will Deacon <will.deacon@arm.com>
8 */

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27 u64 module_alloc_end = module_alloc_base + MODULES_VSIZE;
28 gfp_t gfp_mask = GFP_KERNEL;
29 void *p;
30
31 /* Silence the initial allocation */
32 if (IS_ENABLED(CONFIG_ARM64_MODULE_PLTS))
33 gfp_mask |= __GFP_NOWARN;
34
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * AArch64 loadable module support.
4 *
5 * Copyright (C) 2012 ARM Limited
6 *
7 * Author: Will Deacon <will.deacon@arm.com>
8 */

--- 18 unchanged lines hidden (view full) ---

27 u64 module_alloc_end = module_alloc_base + MODULES_VSIZE;
28 gfp_t gfp_mask = GFP_KERNEL;
29 void *p;
30
31 /* Silence the initial allocation */
32 if (IS_ENABLED(CONFIG_ARM64_MODULE_PLTS))
33 gfp_mask |= __GFP_NOWARN;
34
35 if (IS_ENABLED(CONFIG_KASAN_GENERIC) ||
36 IS_ENABLED(CONFIG_KASAN_SW_TAGS))
37 /* don't exceed the static module region - see below */
38 module_alloc_end = MODULES_END;
39
40 p = __vmalloc_node_range(size, MODULE_ALIGN, module_alloc_base,
35 p = __vmalloc_node_range(size, MODULE_ALIGN, module_alloc_base,
41 module_alloc_end, gfp_mask, PAGE_KERNEL, VM_DEFER_KMEMLEAK,
36 module_alloc_end, gfp_mask, PAGE_KERNEL, 0,
42 NUMA_NO_NODE, __builtin_return_address(0));
43
37 NUMA_NO_NODE, __builtin_return_address(0));
38
44 if (!p && IS_ENABLED(CONFIG_ARM64_MODULE_PLTS) &&
45 (IS_ENABLED(CONFIG_KASAN_VMALLOC) ||
46 (!IS_ENABLED(CONFIG_KASAN_GENERIC) &&
47 !IS_ENABLED(CONFIG_KASAN_SW_TAGS))))
48 /*
49 * KASAN without KASAN_VMALLOC can only deal with module
50 * allocations being served from the reserved module region,
51 * since the remainder of the vmalloc region is already
52 * backed by zero shadow pages, and punching holes into it
53 * is non-trivial. Since the module region is not randomized
54 * when KASAN is enabled without KASAN_VMALLOC, it is even
55 * less likely that the module region gets exhausted, so we
56 * can simply omit this fallback in that case.
57 */
39 if (!p && IS_ENABLED(CONFIG_ARM64_MODULE_PLTS)) {
58 p = __vmalloc_node_range(size, MODULE_ALIGN, module_alloc_base,
59 module_alloc_base + SZ_2G, GFP_KERNEL,
60 PAGE_KERNEL, 0, NUMA_NO_NODE,
61 __builtin_return_address(0));
40 p = __vmalloc_node_range(size, MODULE_ALIGN, module_alloc_base,
41 module_alloc_base + SZ_2G, GFP_KERNEL,
42 PAGE_KERNEL, 0, NUMA_NO_NODE,
43 __builtin_return_address(0));
44 }
62
63 if (p && (kasan_alloc_module_shadow(p, size, gfp_mask) < 0)) {
64 vfree(p);
65 return NULL;
66 }
67
68 /* Memory is intended to be executable, reset the pointer tag. */
69 return kasan_reset_tag(p);

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46 if (p && (kasan_alloc_module_shadow(p, size, gfp_mask) < 0)) {
47 vfree(p);
48 return NULL;
49 }
50
51 /* Memory is intended to be executable, reset the pointer tag. */
52 return kasan_reset_tag(p);

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