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| author | Sami Tolvanen <samitolvanen@google.com> | 2019-10-08 15:40:45 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2019-10-11 12:49:18 +0200 |
| commit | 8661d769ab77c675b5eb6c3351a372b9fbc1bf40 (patch) | |
| tree | 3f79c8ba1cde7245036e6d4d66ec0821de2272ef /arch/x86/include/asm/syscall_wrapper.h | |
| parent | 8a8c600de5dc1d9a7f4b83269fddc80ebd3dd045 (diff) | |
| download | linux-8661d769ab77c675b5eb6c3351a372b9fbc1bf40.tar.gz linux-8661d769ab77c675b5eb6c3351a372b9fbc1bf40.tar.bz2 linux-8661d769ab77c675b5eb6c3351a372b9fbc1bf40.zip | |
syscalls/x86: Use the correct function type in SYSCALL_DEFINE0
Although a syscall defined using SYSCALL_DEFINE0 doesn't accept
parameters, use the correct function type to avoid type mismatches
with Control-Flow Integrity (CFI) checking.
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Acked-by: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: H . Peter Anvin <hpa@zytor.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20191008224049.115427-2-samitolvanen@google.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/include/asm/syscall_wrapper.h')
| -rw-r--r-- | arch/x86/include/asm/syscall_wrapper.h | 23 |
1 files changed, 12 insertions, 11 deletions
diff --git a/arch/x86/include/asm/syscall_wrapper.h b/arch/x86/include/asm/syscall_wrapper.h index e046a405743d..90eb70df0b18 100644 --- a/arch/x86/include/asm/syscall_wrapper.h +++ b/arch/x86/include/asm/syscall_wrapper.h @@ -48,12 +48,13 @@ * To keep the naming coherent, re-define SYSCALL_DEFINE0 to create an alias * named __ia32_sys_*() */ -#define SYSCALL_DEFINE0(sname) \ - SYSCALL_METADATA(_##sname, 0); \ - asmlinkage long __x64_sys_##sname(void); \ - ALLOW_ERROR_INJECTION(__x64_sys_##sname, ERRNO); \ - SYSCALL_ALIAS(__ia32_sys_##sname, __x64_sys_##sname); \ - asmlinkage long __x64_sys_##sname(void) + +#define SYSCALL_DEFINE0(sname) \ + SYSCALL_METADATA(_##sname, 0); \ + asmlinkage long __x64_sys_##sname(const struct pt_regs *__unused);\ + ALLOW_ERROR_INJECTION(__x64_sys_##sname, ERRNO); \ + SYSCALL_ALIAS(__ia32_sys_##sname, __x64_sys_##sname); \ + asmlinkage long __x64_sys_##sname(const struct pt_regs *__unused) #define COND_SYSCALL(name) \ cond_syscall(__x64_sys_##name); \ @@ -181,11 +182,11 @@ * macros to work correctly. */ #ifndef SYSCALL_DEFINE0 -#define SYSCALL_DEFINE0(sname) \ - SYSCALL_METADATA(_##sname, 0); \ - asmlinkage long __x64_sys_##sname(void); \ - ALLOW_ERROR_INJECTION(__x64_sys_##sname, ERRNO); \ - asmlinkage long __x64_sys_##sname(void) +#define SYSCALL_DEFINE0(sname) \ + SYSCALL_METADATA(_##sname, 0); \ + asmlinkage long __x64_sys_##sname(const struct pt_regs *__unused);\ + ALLOW_ERROR_INJECTION(__x64_sys_##sname, ERRNO); \ + asmlinkage long __x64_sys_##sname(const struct pt_regs *__unused) #endif #ifndef COND_SYSCALL |