diff options
33 files changed, 90 insertions, 109 deletions
diff --git a/Documentation/DocBook/kgdb.tmpl b/Documentation/DocBook/kgdb.tmpl index f3abca7ec53d..856ac20bf367 100644 --- a/Documentation/DocBook/kgdb.tmpl +++ b/Documentation/DocBook/kgdb.tmpl @@ -115,12 +115,12 @@ </para> <para> If the architecture that you are using supports the kernel option - CONFIG_DEBUG_RODATA, you should consider turning it off. This + CONFIG_STRICT_KERNEL_RWX, you should consider turning it off. This option will prevent the use of software breakpoints because it marks certain regions of the kernel's memory space as read-only. If kgdb supports it for the architecture you are using, you can use hardware breakpoints if you desire to run with the - CONFIG_DEBUG_RODATA option turned on, else you need to turn off + CONFIG_STRICT_KERNEL_RWX option turned on, else you need to turn off this option. </para> <para> @@ -135,7 +135,7 @@ <para>Here is an example set of .config symbols to enable or disable for kgdb: <itemizedlist> - <listitem><para># CONFIG_DEBUG_RODATA is not set</para></listitem> + <listitem><para># CONFIG_STRICT_KERNEL_RWX is not set</para></listitem> <listitem><para>CONFIG_FRAME_POINTER=y</para></listitem> <listitem><para>CONFIG_KGDB=y</para></listitem> <listitem><para>CONFIG_KGDB_SERIAL_CONSOLE=y</para></listitem> @@ -166,7 +166,7 @@ </para> <para>Here is an example set of .config symbols to enable/disable kdb: <itemizedlist> - <listitem><para># CONFIG_DEBUG_RODATA is not set</para></listitem> + <listitem><para># CONFIG_STRICT_KERNEL_RWX is not set</para></listitem> <listitem><para>CONFIG_FRAME_POINTER=y</para></listitem> <listitem><para>CONFIG_KGDB=y</para></listitem> <listitem><para>CONFIG_KGDB_SERIAL_CONSOLE=y</para></listitem> diff --git a/Documentation/security/self-protection.txt b/Documentation/security/self-protection.txt index 3010576c9fca..141acfebe6ef 100644 --- a/Documentation/security/self-protection.txt +++ b/Documentation/security/self-protection.txt @@ -51,11 +51,17 @@ kernel, they are implemented in a way where the memory is temporarily made writable during the update, and then returned to the original permissions.) -In support of this are (the poorly named) CONFIG_DEBUG_RODATA and -CONFIG_DEBUG_SET_MODULE_RONX, which seek to make sure that code is not +In support of this are CONFIG_STRICT_KERNEL_RWX and +CONFIG_STRICT_MODULE_RWX, which seek to make sure that code is not writable, data is not executable, and read-only data is neither writable nor executable. +Most architectures have these options on by default and not user selectable. +For some architectures like arm that wish to have these be selectable, +the architecture Kconfig can select ARCH_OPTIONAL_KERNEL_RWX to enable +a Kconfig prompt. CONFIG_ARCH_OPTIONAL_KERNEL_RWX_DEFAULT determines +the default setting when ARCH_OPTIONAL_KERNEL_RWX is enabled. + #### Function pointers and sensitive variables must not be writable Vast areas of kernel memory contain function pointers that are looked diff --git a/arch/Kconfig b/arch/Kconfig index 99839c23d453..33f5a555c32a 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -781,4 +781,38 @@ config VMAP_STACK the stack to map directly to the KASAN shadow map using a formula that is incorrect if the stack is in vmalloc space. +config ARCH_OPTIONAL_KERNEL_RWX + def_bool n + +config ARCH_OPTIONAL_KERNEL_RWX_DEFAULT + def_bool n + +config ARCH_HAS_STRICT_KERNEL_RWX + def_bool n + +config STRICT_KERNEL_RWX + bool "Make kernel text and rodata read-only" if ARCH_OPTIONAL_KERNEL_RWX + depends on ARCH_HAS_STRICT_KERNEL_RWX + default !ARCH_OPTIONAL_KERNEL_RWX || ARCH_OPTIONAL_KERNEL_RWX_DEFAULT + help + If this is set, kernel text and rodata memory will be made read-only, + and non-text memory will be made non-executable. This provides + protection against certain security exploits (e.g. executing the heap + or modifying text) + + These features are considered standard security practice these days. + You should say Y here in almost all cases. + +config ARCH_HAS_STRICT_MODULE_RWX + def_bool n + +config STRICT_MODULE_RWX + bool "Set loadable kernel module data as NX and text as RO" if ARCH_OPTIONAL_KERNEL_RWX + depends on ARCH_HAS_STRICT_MODULE_RWX && MODULES + default !ARCH_OPTIONAL_KERNEL_RWX || ARCH_OPTIONAL_KERNEL_RWX_DEFAULT + help + If this is set, module text and rodata memory will be made read-only, + and non-text memory will be made non-executable. This provides + protection against certain security exploits (e.g. writing to text) + source "kernel/gcov/Kconfig" diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 186c4c214e0a..8748353ed5e0 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -4,10 +4,14 @@ config ARM select ARCH_CLOCKSOURCE_DATA select ARCH_HAS_DEVMEM_IS_ALLOWED select ARCH_HAS_ELF_RANDOMIZE + select ARCH_HAS_STRICT_KERNEL_RWX if MMU && !XIP_KERNEL + select ARCH_HAS_STRICT_MODULE_RWX if MMU select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST select ARCH_HAVE_CUSTOM_GPIO_H select ARCH_HAS_GCOV_PROFILE_ALL select ARCH_MIGHT_HAVE_PC_PARPORT + select ARCH_OPTIONAL_KERNEL_RWX if ARCH_HAS_STRICT_KERNEL_RWX + select ARCH_OPTIONAL_KERNEL_RWX_DEFAULT if CPU_V7 select ARCH_SUPPORTS_ATOMIC_RMW select ARCH_USE_BUILTIN_BSWAP select ARCH_USE_CMPXCHG_LOCKREF diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug index d83f7c369e51..426d2716f55d 100644 --- a/arch/arm/Kconfig.debug +++ b/arch/arm/Kconfig.debug @@ -1738,17 +1738,6 @@ config PID_IN_CONTEXTIDR additional instructions during context switch. Say Y here only if you are planning to use hardware trace tools with this kernel. -config DEBUG_SET_MODULE_RONX - bool "Set loadable kernel module data as NX and text as RO" - depends on MODULES && MMU - ---help--- - This option helps catch unintended modifications to loadable - kernel module's text and read-only data. It also prevents execution - of module data. Such protection may interfere with run-time code - patching and dynamic kernel tracing - and they might also protect - against certain classes of kernel exploits. - If in doubt, say "N". - source "drivers/hwtracing/coresight/Kconfig" endmenu diff --git a/arch/arm/configs/aspeed_g4_defconfig b/arch/arm/configs/aspeed_g4_defconfig index ca39c04fec6b..05b99bc1c1ce 100644 --- a/arch/arm/configs/aspeed_g4_defconfig +++ b/arch/arm/configs/aspeed_g4_defconfig @@ -25,7 +25,6 @@ CONFIG_MODULE_UNLOAD=y # CONFIG_ARCH_MULTI_V7 is not set CONFIG_ARCH_ASPEED=y CONFIG_MACH_ASPEED_G4=y -CONFIG_DEBUG_RODATA=y CONFIG_AEABI=y CONFIG_UACCESS_WITH_MEMCPY=y CONFIG_SECCOMP=y @@ -79,7 +78,8 @@ CONFIG_DEBUG_LL_UART_8250=y CONFIG_DEBUG_UART_PHYS=0x1e784000 CONFIG_DEBUG_UART_VIRT=0xe8784000 CONFIG_EARLY_PRINTK=y -CONFIG_DEBUG_SET_MODULE_RONX=y +CONFIG_STRICT_MODULE_RWX=y +CONFIG_STRICT_KERNEL_RWX=y # CONFIG_XZ_DEC_X86 is not set # CONFIG_XZ_DEC_POWERPC is not set # CONFIG_XZ_DEC_IA64 is not set diff --git a/arch/arm/configs/aspeed_g5_defconfig b/arch/arm/configs/aspeed_g5_defconfig index 4f366b0370e9..05a16d53d03c 100644 --- a/arch/arm/configs/aspeed_g5_defconfig +++ b/arch/arm/configs/aspeed_g5_defconfig @@ -26,7 +26,6 @@ CONFIG_ARCH_MULTI_V6=y # CONFIG_ARCH_MULTI_V7 is not set CONFIG_ARCH_ASPEED=y CONFIG_MACH_ASPEED_G5=y -CONFIG_DEBUG_RODATA=y CONFIG_AEABI=y CONFIG_UACCESS_WITH_MEMCPY=y CONFIG_SECCOMP=y @@ -81,7 +80,8 @@ CONFIG_DEBUG_LL_UART_8250=y CONFIG_DEBUG_UART_PHYS=0x1e784000 CONFIG_DEBUG_UART_VIRT=0xe8784000 CONFIG_EARLY_PRINTK=y -CONFIG_DEBUG_SET_MODULE_RONX=y +CONFIG_STRICT_MODULE_RWX=y +CONFIG_STRICT_KERNEL_RWX=y # CONFIG_XZ_DEC_X86 is not set # CONFIG_XZ_DEC_POWERPC is not set # CONFIG_XZ_DEC_IA64 is not set diff --git a/arch/arm/include/asm/cacheflush.h b/arch/arm/include/asm/cacheflush.h index bdd283bc5842..02454fa15d2c 100644 --- a/arch/arm/include/asm/cacheflush.h +++ b/arch/arm/include/asm/cacheflush.h @@ -490,7 +490,7 @@ static inline int set_memory_x(unsigned long addr, int numpages) { return 0; } static inline int set_memory_nx(unsigned long addr, int numpages) { return 0; } #endif -#ifdef CONFIG_DEBUG_RODATA +#ifdef CONFIG_STRICT_KERNEL_RWX void set_kernel_text_rw(void); void set_kernel_text_ro(void); #else diff --git a/arch/arm/kernel/patch.c b/arch/arm/kernel/patch.c index 69bda1a5707e..020560b2dcb7 100644 --- a/arch/arm/kernel/patch.c +++ b/arch/arm/kernel/patch.c @@ -24,9 +24,9 @@ static void __kprobes *patch_map(void *addr, int fixmap, unsigned long *flags) bool module = !core_kernel_text(uintaddr); struct page *page; - if (module && IS_ENABLED(CONFIG_DEBUG_SET_MODULE_RONX)) + if (module && IS_ENABLED(CONFIG_STRICT_MODULE_RWX)) page = vmalloc_to_page(addr); - else if (!module && IS_ENABLED(CONFIG_DEBUG_RODATA)) + else if (!module && IS_ENABLED(CONFIG_STRICT_KERNEL_RWX)) page = virt_to_page(addr); else return addr; diff --git a/arch/arm/kernel/vmlinux.lds.S b/arch/arm/kernel/vmlinux.lds.S index f7f55df0bf7b..ce18007f9e4e 100644 --- a/arch/arm/kernel/vmlinux.lds.S +++ b/arch/arm/kernel/vmlinux.lds.S @@ -97,7 +97,7 @@ SECTIONS HEAD_TEXT } -#ifdef CONFIG_DEBUG_RODATA +#ifdef CONFIG_STRICT_KERNEL_RWX . = ALIGN(1<<SECTION_SHIFT); #endif @@ -158,7 +158,7 @@ SECTIONS NOTES -#ifdef CONFIG_DEBUG_RODATA +#ifdef CONFIG_STRICT_KERNEL_RWX . = ALIGN(1<<SECTION_SHIFT); #else . = ALIGN(PAGE_SIZE); @@ -230,7 +230,7 @@ SECTIONS PERCPU_SECTION(L1_CACHE_BYTES) #endif -#ifdef CONFIG_DEBUG_RODATA +#ifdef CONFIG_STRICT_KERNEL_RWX . = ALIGN(1<<SECTION_SHIFT); #else . = ALIGN(THREAD_SIZE); @@ -325,7 +325,7 @@ SECTIONS STABS_DEBUG } -#ifdef CONFIG_DEBUG_RODATA +#ifdef CONFIG_STRICT_KERNEL_RWX /* * Without CONFIG_DEBUG_ALIGN_RODATA, __start_rodata_section_aligned will * be the first section-aligned location after __start_rodata. Otherwise, diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig index f68e8ec29447..35e3a56e5d86 100644 --- a/arch/arm/mm/Kconfig +++ b/arch/arm/mm/Kconfig @@ -1051,21 +1051,9 @@ config ARCH_SUPPORTS_BIG_ENDIAN This option specifies the architecture can support big endian operation. -config DEBUG_RODATA - bool "Make kernel text and rodata read-only" - depends on MMU && !XIP_KERNEL - default y if CPU_V7 - help - If this is set, kernel text and rodata memory will be made - read-only, and non-text kernel memory will be made non-executable. - The tradeoff is that each region is padded to section-size (1MiB) - boundaries (because their permissions are different and splitting - the 1M pages into 4K ones causes TLB performance problems), which - can waste memory. - config DEBUG_ALIGN_RODATA bool "Make rodata strictly non-executable" - depends on DEBUG_RODATA + depends on STRICT_KERNEL_RWX default y help If this is set, rodata will be made explicitly non-executable. This diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c index 370581aeb871..4be0bee4c357 100644 --- a/arch/arm/mm/init.c +++ b/arch/arm/mm/init.c @@ -572,7 +572,7 @@ void __init mem_init(void) } } -#ifdef CONFIG_DEBUG_RODATA +#ifdef CONFIG_STRICT_KERNEL_RWX struct section_perm { const char *name; unsigned long start; @@ -741,7 +741,7 @@ void set_kernel_text_ro(void) #else static inline void fix_kernmem_perms(void) { } -#endif /* CONFIG_DEBUG_RODATA */ +#endif /* CONFIG_STRICT_KERNEL_RWX */ void free_tcmmem(void) { diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index f7dfd6d58659..3bebdaf1d009 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -13,6 +13,8 @@ config ARM64 select ARCH_HAS_GIGANTIC_PAGE select ARCH_HAS_KCOV select ARCH_HAS_SG_CHAIN + select ARCH_HAS_STRICT_KERNEL_RWX + select ARCH_HAS_STRICT_MODULE_RWX select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST select ARCH_USE_CMPXCHG_LOCKREF select ARCH_SUPPORTS_ATOMIC_RMW @@ -123,9 +125,6 @@ config ARCH_PHYS_ADDR_T_64BIT config MMU def_bool y -config DEBUG_RODATA - def_bool y - config ARM64_PAGE_SHIFT int default 16 if ARM64_64K_PAGES diff --git a/arch/arm64/Kconfig.debug b/arch/arm64/Kconfig.debug index d1ebd46872fd..560a8d85a4f8 100644 --- a/arch/arm64/Kconfig.debug +++ b/arch/arm64/Kconfig.debug @@ -71,19 +71,8 @@ config DEBUG_WX If in doubt, say "Y". -config DEBUG_SET_MODULE_RONX - bool "Set loadable kernel module data as NX and text as RO" - depends on MODULES - default y - help - Is this is set, kernel module text and rodata will be made read-only. - This is to help catch accidental or malicious attempts to change the - kernel's executable code. - - If in doubt, say Y. - config DEBUG_ALIGN_RODATA - depends on DEBUG_RODATA + depends on STRICT_KERNEL_RWX bool "Align linker sections up to SECTION_SIZE" help If this option is enabled, sections that may potentially be marked as diff --git a/arch/arm64/kernel/insn.c b/arch/arm64/kernel/insn.c index 94b62c1fa4df..67f9cb9e8512 100644 --- a/arch/arm64/kernel/insn.c +++ b/arch/arm64/kernel/insn.c @@ -93,7 +93,7 @@ static void __kprobes *patch_map(void *addr, int fixmap) bool module = !core_kernel_text(uintaddr); struct page *page; - if (module && IS_ENABLED(CONFIG_DEBUG_SET_MODULE_RONX)) + if (module && IS_ENABLED(CONFIG_STRICT_MODULE_RWX)) page = vmalloc_to_page(addr); else if (!module) page = pfn_to_page(PHYS_PFN(__pa(addr))); diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig index 3a71f38cdc05..ad294b3fb90b 100644 --- a/arch/parisc/Kconfig +++ b/arch/parisc/Kconfig @@ -8,6 +8,7 @@ config PARISC select HAVE_SYSCALL_TRACEPOINTS select ARCH_WANT_FRAME_POINTERS select ARCH_HAS_ELF_RANDOMIZE + select ARCH_HAS_STRICT_KERNEL_RWX select RTC_CLASS select RTC_DRV_GENERIC select INIT_ALL_POSSIBLE diff --git a/arch/parisc/Kconfig.debug b/arch/parisc/Kconfig.debug index 68b7cbd0810a..0d856b94c9b1 100644 --- a/arch/parisc/Kconfig.debug +++ b/arch/parisc/Kconfig.debug @@ -5,15 +5,4 @@ source "lib/Kconfig.debug" config TRACE_IRQFLAGS_SUPPORT def_bool y -config DEBUG_RODATA - bool "Write protect kernel read-only data structures" - depends on DEBUG_KERNEL - default y - help - Mark the kernel read-only data as write-protected in the pagetables, - in order to catch accidental (and incorrect) writes to such const - data. This option may have a slight performance impact because a - portion of the kernel code won't be covered by a TLB anymore. - If in doubt, say "N". - endmenu diff --git a/arch/parisc/configs/712_defconfig b/arch/parisc/configs/712_defconfig index db8f56bf3883..143d02652792 100644 --- a/arch/parisc/configs/712_defconfig +++ b/arch/parisc/configs/712_defconfig @@ -182,7 +182,6 @@ CONFIG_DEBUG_FS=y CONFIG_DEBUG_KERNEL=y CONFIG_DEBUG_MUTEXES=y # CONFIG_RCU_CPU_STALL_DETECTOR is not set -CONFIG_DEBUG_RODATA=y CONFIG_CRYPTO_NULL=m CONFIG_CRYPTO_TEST=m CONFIG_CRYPTO_HMAC=y diff --git a/arch/parisc/configs/c3000_defconfig b/arch/parisc/configs/c3000_defconfig index fb92b8920785..8e8f0e34f817 100644 --- a/arch/parisc/configs/c3000_defconfig +++ b/arch/parisc/configs/c3000_defconfig @@ -166,7 +166,6 @@ CONFIG_DEBUG_KERNEL=y CONFIG_DEBUG_MUTEXES=y # CONFIG_DEBUG_BUGVERBOSE is not set # CONFIG_RCU_CPU_STALL_DETECTOR is not set -CONFIG_DEBUG_RODATA=y CONFIG_CRYPTO_NULL=m CONFIG_CRYPTO_TEST=m CONFIG_CRYPTO_MD5=m diff --git a/arch/parisc/mm/init.c b/arch/parisc/mm/init.c index e02ada312be8..a055e5b6b380 100644 --- a/arch/parisc/mm/init.c +++ b/arch/parisc/mm/init.c @@ -545,7 +545,7 @@ void free_initmem(void) } -#ifdef CONFIG_DEBUG_RODATA +#ifdef CONFIG_STRICT_KERNEL_RWX void mark_rodata_ro(void) { /* rodata memory was already mapped with KERNEL_RO access rights by diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index c6722112527d..53bb0e3e0db3 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -62,9 +62,6 @@ config PCI_QUIRKS config ARCH_SUPPORTS_UPROBES def_bool y -config DEBUG_RODATA - def_bool y - config S390 def_bool y select ARCH_HAS_DEVMEM_IS_ALLOWED @@ -73,6 +70,8 @@ config S390 select ARCH_HAS_GIGANTIC_PAGE select ARCH_HAS_KCOV select ARCH_HAS_SG_CHAIN + select ARCH_HAS_STRICT_KERNEL_RWX + select ARCH_HAS_STRICT_MODULE_RWX select ARCH_HAS_UBSAN_SANITIZE_ALL select ARCH_HAVE_NMI_SAFE_CMPXCHG select ARCH_INLINE_READ_LOCK diff --git a/arch/s390/Kconfig.debug b/arch/s390/Kconfig.debug index 26c5d5beb4be..57f8ea9c49e3 100644 --- a/arch/s390/Kconfig.debug +++ b/arch/s390/Kconfig.debug @@ -17,7 +17,4 @@ config S390_PTDUMP kernel. If in doubt, say "N" -config DEBUG_SET_MODULE_RONX - def_bool y - depends on MODULES endmenu diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index f8fbfc5a98ba..4ca8c41623f4 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -54,6 +54,8 @@ config X86 select ARCH_HAS_MMIO_FLUSH select ARCH_HAS_PMEM_API if X86_64 select ARCH_HAS_SG_CHAIN + select ARCH_HAS_STRICT_KERNEL_RWX + select ARCH_HAS_STRICT_MODULE_RWX select ARCH_HAS_UBSAN_SANITIZE_ALL select ARCH_HAVE_NMI_SAFE_CMPXCHG select ARCH_MIGHT_HAVE_ACPI_PDC if ACPI @@ -309,9 +311,6 @@ config ARCH_SUPPORTS_UPROBES config FIX_EARLYCON_MEM def_bool y -config DEBUG_RODATA - def_bool y - config PGTABLE_LEVELS int default 4 if X86_64 diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug index 783099f2ac72..c4cba00dbdee 100644 --- a/arch/x86/Kconfig.debug +++ b/arch/x86/Kconfig.debug @@ -109,17 +109,6 @@ config DEBUG_WX If in doubt, say "Y". -config DEBUG_SET_MODULE_RONX - bool "Set loadable kernel module data as NX and text as RO" - depends on MODULES - ---help--- - This option helps catch unintended modifications to loadable - kernel module's text and read-only data. It also prevents execution - of module data. Such protection may interfere with run-time code - patching and dynamic kernel tracing - and they might also protect - against certain classes of kernel exploits. - If in doubt, say "N". - config DOUBLEFAULT default y bool "Enable doublefault exception handler" if EXPERT diff --git a/include/linux/filter.h b/include/linux/filter.h index e4eb2546339a..c2d282764d5d 100644 --- a/include/linux/filter.h +++ b/include/linux/filter.h @@ -545,7 +545,7 @@ static inline bool bpf_prog_was_classic(const struct bpf_prog *prog) #define bpf_classic_proglen(fprog) (fprog->len * sizeof(fprog->filter[0])) -#ifdef CONFIG_DEBUG_SET_MODULE_RONX +#ifdef CONFIG_STRICT_MODULE_RWX static inline void bpf_prog_lock_ro(struct bpf_prog *fp) { set_memory_ro((unsigned long)fp, fp->pages); @@ -563,7 +563,7 @@ static inline void bpf_prog_lock_ro(struct bpf_prog *fp) static inline void bpf_prog_unlock_ro(struct bpf_prog *fp) { } -#endif /* CONFIG_DEBUG_SET_MODULE_RONX */ +#endif /* CONFIG_STRICT_MODULE_RWX */ int sk_filter_trim_cap(struct sock *sk, struct sk_buff *skb, unsigned int cap); static inline int sk_filter(struct sock *sk, struct sk_buff *skb) diff --git a/include/linux/init.h b/include/linux/init.h index 885c3e6d0f9d..79af0962fd52 100644 --- a/include/linux/init.h +++ b/include/linux/init.h @@ -126,10 +126,10 @@ void prepare_namespace(void); void __init load_default_modules(void); int __init init_rootfs(void); -#if defined(CONFIG_DEBUG_RODATA) || defined(CONFIG_DEBUG_SET_MODULE_RONX) +#if defined(CONFIG_STRICT_KERNEL_RWX) || defined(CONFIG_STRICT_MODULE_RWX) extern bool rodata_enabled; #endif -#ifdef CONFIG_DEBUG_RODATA +#ifdef CONFIG_STRICT_KERNEL_RWX void mark_rodata_ro(void); #endif diff --git a/include/linux/module.h b/include/linux/module.h index 5cddadff2c25..f4f542ed3d92 100644 --- a/include/linux/module.h +++ b/include/linux/module.h @@ -763,7 +763,7 @@ extern int module_sysfs_initialized; #define __MODULE_STRING(x) __stringify(x) -#ifdef CONFIG_DEBUG_SET_MODULE_RONX +#ifdef CONFIG_STRICT_MODULE_RWX extern void set_all_modules_text_rw(void); extern void set_all_modules_text_ro(void); extern void module_enable_ro(const struct module *mod, bool after_init); diff --git a/init/main.c b/init/main.c index 6d98664e843b..c8a00f0f10ff 100644 --- a/init/main.c +++ b/init/main.c @@ -924,7 +924,7 @@ static int try_to_run_init_process(const char *init_filename) static noinline void __init kernel_init_freeable(void); -#if defined(CONFIG_DEBUG_RODATA) || defined(CONFIG_DEBUG_SET_MODULE_RONX) +#if defined(CONFIG_STRICT_KERNEL_RWX) || defined(CONFIG_STRICT_MODULE_RWX) bool rodata_enabled __ro_after_init = true; static int __init set_debug_rodata(char *str) { @@ -933,7 +933,7 @@ static int __init set_debug_rodata(char *str) __setup("rodata=", set_debug_rodata); #endif -#ifdef CONFIG_DEBUG_RODATA +#ifdef CONFIG_STRICT_KERNEL_RWX static void mark_readonly(void) { if (rodata_enabled) diff --git a/kernel/configs/android-recommended.config b/kernel/configs/android-recommended.config index 297756be369c..99127edc5204 100644 --- a/kernel/configs/android-recommended.config +++ b/kernel/configs/android-recommended.config @@ -11,7 +11,7 @@ CONFIG_BLK_DEV_LOOP=y CONFIG_BLK_DEV_RAM=y CONFIG_BLK_DEV_RAM_SIZE=8192 CONFIG_COMPACTION=y -CONFIG_DEBUG_RODATA=y +CONFIG_STRICT_KERNEL_RWX=y CONFIG_DM_CRYPT=y CONFIG_DM_UEVENT=y CONFIG_DM_VERITY=y diff --git a/kernel/module.c b/kernel/module.c index 1a17ec0c8ae7..a3889169a3ae 100644 --- a/kernel/module.c +++ b/kernel/module.c @@ -76,9 +76,9 @@ /* * Modules' sections will be aligned on page boundaries * to ensure complete separation of code and data, but - * only when CONFIG_DEBUG_SET_MODULE_RONX=y + * only when CONFIG_STRICT_MODULE_RWX=y */ -#ifdef CONFIG_DEBUG_SET_MODULE_RONX +#ifdef CONFIG_STRICT_MODULE_RWX # define debug_align(X) ALIGN(X, PAGE_SIZE) #else # define debug_align(X) (X) @@ -1846,7 +1846,7 @@ static void mod_sysfs_teardown(struct module *mod) mod_sysfs_fini(mod); } -#ifdef CONFIG_DEBUG_SET_MODULE_RONX +#ifdef CONFIG_STRICT_MODULE_RWX /* * LKM RO/NX protection: protect module's text/ro-data * from modification and any data from execution. diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c index b26dbc48c75b..86385af1080f 100644 --- a/kernel/power/hibernate.c +++ b/kernel/power/hibernate.c @@ -1156,7 +1156,7 @@ static int __init hibernate_setup(char *str) } else if (!strncmp(str, "no", 2)) { noresume = 1; nohibernate = 1; - } else if (IS_ENABLED(CONFIG_DEBUG_RODATA) + } else if (IS_ENABLED(CONFIG_STRICT_KERNEL_RWX) && !strncmp(str, "protect_image", 13)) { enable_restore_image_protection(); } diff --git a/kernel/power/power.h b/kernel/power/power.h index 1dfa0da827d3..7fdc40d31b7d 100644 --- a/kernel/power/power.h +++ b/kernel/power/power.h @@ -61,12 +61,12 @@ extern int hibernation_snapshot(int platform_mode); extern int hibernation_restore(int platform_mode); extern int hibernation_platform_enter(void); -#ifdef CONFIG_DEBUG_RODATA +#ifdef CONFIG_STRICT_KERNEL_RWX /* kernel/power/snapshot.c */ extern void enable_restore_image_protection(void); #else static inline void enable_restore_image_protection(void) {} -#endif /* CONFIG_DEBUG_RODATA */ +#endif /* CONFIG_STRICT_KERNEL_RWX */ #else /* !CONFIG_HIBERNATION */ diff --git a/kernel/power/snapshot.c b/kernel/power/snapshot.c index 2d8e2b227db8..905d5bbd595f 100644 --- a/kernel/power/snapshot.c +++ b/kernel/power/snapshot.c @@ -38,7 +38,7 @@ #include "power.h" -#ifdef CONFIG_DEBUG_RODATA +#ifdef CONFIG_STRICT_KERNEL_RWX static bool hibernate_restore_protection; static bool hibernate_restore_protection_active; @@ -73,7 +73,7 @@ static inline void hibernate_restore_protection_begin(void) {} static inline void hibernate_restore_protection_end(void) {} static inline void hibernate_restore_protect_page(void *page_address) {} static inline void hibernate_restore_unprotect_page(void *page_address) {} -#endif /* CONFIG_DEBUG_RODATA */ +#endif /* CONFIG_STRICT_KERNEL_RWX */ static int swsusp_page_is_free(struct page *); static void swsusp_set_page_forbidden(struct page *); |