diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/bpf/core.c | 6 | ||||
| -rw-r--r-- | kernel/kprobes.c | 8 | ||||
| -rw-r--r-- | kernel/module/Kconfig | 1 | ||||
| -rw-r--r-- | kernel/module/main.c | 25 |
4 files changed, 16 insertions, 24 deletions
diff --git a/kernel/bpf/core.c b/kernel/bpf/core.c index 1ea5ce5bb599..892e50afda59 100644 --- a/kernel/bpf/core.c +++ b/kernel/bpf/core.c @@ -22,7 +22,6 @@ #include <linux/skbuff.h> #include <linux/vmalloc.h> #include <linux/random.h> -#include <linux/moduleloader.h> #include <linux/bpf.h> #include <linux/btf.h> #include <linux/objtool.h> @@ -37,6 +36,7 @@ #include <linux/nospec.h> #include <linux/bpf_mem_alloc.h> #include <linux/memcontrol.h> +#include <linux/execmem.h> #include <asm/barrier.h> #include <asm/unaligned.h> @@ -1050,12 +1050,12 @@ void bpf_jit_uncharge_modmem(u32 size) void *__weak bpf_jit_alloc_exec(unsigned long size) { - return module_alloc(size); + return execmem_alloc(EXECMEM_BPF, size); } void __weak bpf_jit_free_exec(void *addr) { - module_memfree(addr); + execmem_free(addr); } struct bpf_binary_header * diff --git a/kernel/kprobes.c b/kernel/kprobes.c index 65adc815fc6e..ddd7cdc16edf 100644 --- a/kernel/kprobes.c +++ b/kernel/kprobes.c @@ -26,7 +26,6 @@ #include <linux/slab.h> #include <linux/stddef.h> #include <linux/export.h> -#include <linux/moduleloader.h> #include <linux/kallsyms.h> #include <linux/freezer.h> #include <linux/seq_file.h> @@ -39,6 +38,7 @@ #include <linux/jump_label.h> #include <linux/static_call.h> #include <linux/perf_event.h> +#include <linux/execmem.h> #include <asm/sections.h> #include <asm/cacheflush.h> @@ -113,17 +113,17 @@ enum kprobe_slot_state { void __weak *alloc_insn_page(void) { /* - * Use module_alloc() so this page is within +/- 2GB of where the + * Use execmem_alloc() so this page is within +/- 2GB of where the * kernel image and loaded module images reside. This is required * for most of the architectures. * (e.g. x86-64 needs this to handle the %rip-relative fixups.) */ - return module_alloc(PAGE_SIZE); + return execmem_alloc(EXECMEM_KPROBES, PAGE_SIZE); } static void free_insn_page(void *page) { - module_memfree(page); + execmem_free(page); } struct kprobe_insn_cache kprobe_insn_slots = { diff --git a/kernel/module/Kconfig b/kernel/module/Kconfig index cb8377a18927..4047b6d48255 100644 --- a/kernel/module/Kconfig +++ b/kernel/module/Kconfig @@ -2,6 +2,7 @@ menuconfig MODULES bool "Enable loadable module support" modules + select EXECMEM help Kernel modules are small pieces of compiled code which can be inserted in the running kernel, rather than being diff --git a/kernel/module/main.c b/kernel/module/main.c index 5b82b069e0d3..d56b7df0cbb6 100644 --- a/kernel/module/main.c +++ b/kernel/module/main.c @@ -57,6 +57,7 @@ #include <linux/audit.h> #include <linux/cfi.h> #include <linux/debugfs.h> +#include <linux/execmem.h> #include <uapi/linux/module.h> #include "internal.h" @@ -1179,16 +1180,6 @@ resolve_symbol_wait(struct module *mod, return ksym; } -void __weak module_memfree(void *module_region) -{ - /* - * This memory may be RO, and freeing RO memory in an interrupt is not - * supported by vmalloc. - */ - WARN_ON(in_interrupt()); - vfree(module_region); -} - void __weak module_arch_cleanup(struct module *mod) { } @@ -1213,7 +1204,7 @@ static int module_memory_alloc(struct module *mod, enum mod_mem_type type) if (mod_mem_use_vmalloc(type)) ptr = vmalloc(size); else - ptr = module_alloc(size); + ptr = execmem_alloc(EXECMEM_MODULE_TEXT, size); if (!ptr) return -ENOMEM; @@ -1244,7 +1235,7 @@ static void module_memory_free(struct module *mod, enum mod_mem_type type) if (mod_mem_use_vmalloc(type)) vfree(ptr); else - module_memfree(ptr); + execmem_free(ptr); } static void free_mod_mem(struct module *mod) @@ -2496,9 +2487,9 @@ static void do_free_init(struct work_struct *w) llist_for_each_safe(pos, n, list) { initfree = container_of(pos, struct mod_initfree, node); - module_memfree(initfree->init_text); - module_memfree(initfree->init_data); - module_memfree(initfree->init_rodata); + execmem_free(initfree->init_text); + execmem_free(initfree->init_data); + execmem_free(initfree->init_rodata); kfree(initfree); } } @@ -2608,10 +2599,10 @@ static noinline int do_init_module(struct module *mod) * We want to free module_init, but be aware that kallsyms may be * walking this with preempt disabled. In all the failure paths, we * call synchronize_rcu(), but we don't want to slow down the success - * path. module_memfree() cannot be called in an interrupt, so do the + * path. execmem_free() cannot be called in an interrupt, so do the * work and call synchronize_rcu() in a work queue. * - * Note that module_alloc() on most architectures creates W+X page + * Note that execmem_alloc() on most architectures creates W+X page * mappings which won't be cleaned up until do_free_init() runs. Any * code such as mark_rodata_ro() which depends on those mappings to * be cleaned up needs to sync with the queued work by invoking |