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x86: Enable seccomp architecture tracking 

Provide seccomp internals with the details to calculate which syscall
table the running kernel is expecting to deal with. This allows for
efficient architecture pinning and paves the way for constant-action
bitmaps.

Co-developed-by: YiFei Zhu <yifeifz2@illinois.edu>
Signed-off-by: YiFei Zhu <yifeifz2@illinois.edu>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/da58c3733d95c4f2115dd94225dfbe2573ba4d87.1602431034.git.yifeifz2@illinois.edu
This commit is contained in:
Kees Cook 2020-10-11 10:47:44 -05:00
parent 8e01b51a31
commit 25db91209a
1 changed files with 20 additions and 0 deletions
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20
arch/x86/include/asm/seccomp.h
View File

@ -16,6 +16,26 @@
#define __NR_seccomp_sigreturn_32 __NR_ia32_sigreturn
#endif
#ifdef CONFIG_X86_64
# define SECCOMP_ARCH_NATIVE AUDIT_ARCH_X86_64
# define SECCOMP_ARCH_NATIVE_NR NR_syscalls
# define SECCOMP_ARCH_NATIVE_NAME "x86_64"
# ifdef CONFIG_COMPAT
# define SECCOMP_ARCH_COMPAT AUDIT_ARCH_I386
# define SECCOMP_ARCH_COMPAT_NR IA32_NR_syscalls
# define SECCOMP_ARCH_COMPAT_NAME "ia32"
# endif
/*
* x32 will have __X32_SYSCALL_BIT set in syscall number. We don't support
* caching them and they are treated as out of range syscalls, which will
* always pass through the BPF filter.
*/
#else /* !CONFIG_X86_64 */
# define SECCOMP_ARCH_NATIVE AUDIT_ARCH_I386
# define SECCOMP_ARCH_NATIVE_NR NR_syscalls
# define SECCOMP_ARCH_NATIVE_NAME "ia32"
#endif
#include <asm-generic/seccomp.h>
#endif /* _ASM_X86_SECCOMP_H */