diff options
| author | Sami Tolvanen <samitolvanen@google.com> | 2019-10-08 15:40:48 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2019-10-11 12:49:18 +0200 |
| commit | f48f01a92cca09e86d46c91d8edf9d5a71c61727 (patch) | |
| tree | e99a03922f7c3f3dc611834b62a6787efeb4b54e /arch/x86/entry/syscall_32.c | |
| parent | 00198a6eaf66609de5e4de9163bb42c7ca9dd7b7 (diff) | |
syscalls/x86: Use the correct function type for sys_ni_syscall
Use the correct function type for sys_ni_syscall() in system
call tables to fix indirect call 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/20191008224049.115427-5-samitolvanen@google.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/entry/syscall_32.c')
| -rw-r--r-- | arch/x86/entry/syscall_32.c | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/arch/x86/entry/syscall_32.c b/arch/x86/entry/syscall_32.c index aa3336a7cb15..7d17b3addbbb 100644 --- a/arch/x86/entry/syscall_32.c +++ b/arch/x86/entry/syscall_32.c @@ -10,13 +10,11 @@ #ifdef CONFIG_IA32_EMULATION /* On X86_64, we use struct pt_regs * to pass parameters to syscalls */ #define __SYSCALL_I386(nr, sym, qual) extern asmlinkage long sym(const struct pt_regs *); - -/* this is a lie, but it does not hurt as sys_ni_syscall just returns -EINVAL */ -extern asmlinkage long sys_ni_syscall(const struct pt_regs *); - +#define __sys_ni_syscall __ia32_sys_ni_syscall #else /* CONFIG_IA32_EMULATION */ #define __SYSCALL_I386(nr, sym, qual) extern asmlinkage long sym(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long); extern asmlinkage long sys_ni_syscall(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long); +#define __sys_ni_syscall sys_ni_syscall #endif /* CONFIG_IA32_EMULATION */ #include <asm/syscalls_32.h> @@ -29,6 +27,6 @@ __visible const sys_call_ptr_t ia32_sys_call_table[__NR_syscall_compat_max+1] = * Smells like a compiler bug -- it doesn't work * when the & below is removed. */ - [0 ... __NR_syscall_compat_max] = &sys_ni_syscall, + [0 ... __NR_syscall_compat_max] = &__sys_ni_syscall, #include <asm/syscalls_32.h> }; |