[PATCH v2 5/7] kallsyms: Rename is_kernel() and is_kernel_text()
From: Kefeng Wang <hidden>
Date: 2021-07-28 08:07:35
Also in:
bpf, linuxppc-dev, lkml
Subsystem:
bpf jit for x86 64-bit, bpf [general] (safe dynamic programs and tools), clang control flow integrity support, the rest, x86 architecture (32-bit and 64-bit) · Maintainers:
Alexei Starovoitov, Daniel Borkmann, Andrii Nakryiko, Eduard Zingerman, Kumar Kartikeya Dwivedi, Sami Tolvanen, Kees Cook, Linus Torvalds, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen
The is_kernel[_text]() function check the address whether or not in kernel[_text] ranges, also they will check the address whether or not in gate area, so use better name. Cc: Alexei Starovoitov <ast@kernel.org> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Sami Tolvanen <samitolvanen@google.com> Cc: Nathan Chancellor <nathan@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: bpf@vger.kernel.org Signed-off-by: Kefeng Wang <redacted> --- arch/x86/net/bpf_jit_comp.c | 2 +- include/linux/kallsyms.h | 8 ++++---- kernel/cfi.c | 2 +- 3 files changed, 6 insertions(+), 6 deletions(-)
diff --git a/arch/x86/net/bpf_jit_comp.c b/arch/x86/net/bpf_jit_comp.c
index 333650b9372a..c87d0dd4370d 100644
--- a/arch/x86/net/bpf_jit_comp.c
+++ b/arch/x86/net/bpf_jit_comp.c@@ -372,7 +372,7 @@ static int __bpf_arch_text_poke(void *ip, enum bpf_text_poke_type t, int bpf_arch_text_poke(void *ip, enum bpf_text_poke_type t, void *old_addr, void *new_addr) { - if (!is_kernel_text((long)ip) && + if (!is_kernel_text_or_gate_area((long)ip) && !is_bpf_text_address((long)ip)) /* BPF poking in modules is not supported */ return -EINVAL;
diff --git a/include/linux/kallsyms.h b/include/linux/kallsyms.h
index 8a9d329c927c..4f501ac9c2c2 100644
--- a/include/linux/kallsyms.h
+++ b/include/linux/kallsyms.h@@ -24,14 +24,14 @@ struct cred; struct module; -static inline int is_kernel_text(unsigned long addr) +static inline int is_kernel_text_or_gate_area(unsigned long addr) { if ((addr >= (unsigned long)_stext && addr < (unsigned long)_etext)) return 1; return in_gate_area_no_mm(addr); } -static inline int is_kernel(unsigned long addr) +static inline int is_kernel_or_gate_area(unsigned long addr) { if (addr >= (unsigned long)_stext && addr < (unsigned long)_end) return 1;
@@ -41,9 +41,9 @@ static inline int is_kernel(unsigned long addr) static inline int is_ksym_addr(unsigned long addr) { if (IS_ENABLED(CONFIG_KALLSYMS_ALL)) - return is_kernel(addr); + return is_kernel_or_gate_area(addr); - return is_kernel_text(addr) || is_kernel_inittext(addr); + return is_kernel_text_or_gate_area(addr) || is_kernel_inittext(addr); } static inline void *dereference_symbol_descriptor(void *ptr)
diff --git a/kernel/cfi.c b/kernel/cfi.c
index e17a56639766..e7d90eff4382 100644
--- a/kernel/cfi.c
+++ b/kernel/cfi.c@@ -282,7 +282,7 @@ static inline cfi_check_fn find_check_fn(unsigned long ptr) { cfi_check_fn fn = NULL; - if (is_kernel_text(ptr)) + if (is_kernel_text_or_gate_area(ptr)) return __cfi_check; /*
--
2.26.2