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Remove macro trickery; no binary change

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This stops the SC_ALLOW(), SC_ALLOW_ARG() and SC_DENY() macros
prepending __NR_ to the syscall number parameter and just makes
them explicit in the macro invocations.

No binary change in stripped object file before/after.
This commit is contained in:
Damien Miller 2017-03-14 17:48:43 +11:00
parent 5f1596e11d
commit e3ea335abe
1 changed files with 40 additions and 40 deletions
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80
sandbox-seccomp-filter.c
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@ -85,13 +85,13 @@
/* Simple helpers to avoid manual errors (but larger BPF programs). */
#define SC_DENY(_nr, _errno) \
BPF_JUMP(BPF_JMP+BPF_JEQ+BPF_K, __NR_ ## _nr, 0, 1), \
BPF_JUMP(BPF_JMP+BPF_JEQ+BPF_K, (_nr), 0, 1), \
BPF_STMT(BPF_RET+BPF_K, SECCOMP_RET_ERRNO|(_errno))
#define SC_ALLOW(_nr) \
BPF_JUMP(BPF_JMP+BPF_JEQ+BPF_K, __NR_ ## _nr, 0, 1), \
BPF_JUMP(BPF_JMP+BPF_JEQ+BPF_K, (_nr), 0, 1), \
BPF_STMT(BPF_RET+BPF_K, SECCOMP_RET_ALLOW)
#define SC_ALLOW_ARG(_nr, _arg_nr, _arg_val) \
BPF_JUMP(BPF_JMP+BPF_JEQ+BPF_K, __NR_ ## _nr, 0, 6), \
BPF_JUMP(BPF_JMP+BPF_JEQ+BPF_K, (_nr), 0, 6), \
/* load and test first syscall argument, low word */ \
BPF_STMT(BPF_LD+BPF_W+BPF_ABS, \
offsetof(struct seccomp_data, args[(_arg_nr)]) + ARG_LO_OFFSET), \
@ -120,114 +120,114 @@ static const struct sock_filter preauth_insns[] = {
/* Syscalls to non-fatally deny */
#ifdef __NR_lstat
SC_DENY(lstat, EACCES),
SC_DENY(__NR_lstat, EACCES),
#endif
#ifdef __NR_lstat64
SC_DENY(lstat64, EACCES),
SC_DENY(__NR_lstat64, EACCES),
#endif
#ifdef __NR_fstat
SC_DENY(fstat, EACCES),
SC_DENY(__NR_fstat, EACCES),
#endif
#ifdef __NR_fstat64
SC_DENY(fstat64, EACCES),
SC_DENY(__NR_fstat64, EACCES),
#endif
#ifdef __NR_open
SC_DENY(open, EACCES),
SC_DENY(__NR_open, EACCES),
#endif
#ifdef __NR_openat
SC_DENY(openat, EACCES),
SC_DENY(__NR_openat, EACCES),
#endif
#ifdef __NR_newfstatat
SC_DENY(newfstatat, EACCES),
SC_DENY(__NR_newfstatat, EACCES),
#endif
#ifdef __NR_stat
SC_DENY(stat, EACCES),
SC_DENY(__NR_stat, EACCES),
#endif
#ifdef __NR_stat64
SC_DENY(stat64, EACCES),
SC_DENY(__NR_stat64, EACCES),
#endif
/* Syscalls to permit */
#ifdef __NR_brk
SC_ALLOW(brk),
SC_ALLOW(__NR_brk),
#endif
#ifdef __NR_clock_gettime
SC_ALLOW(clock_gettime),
SC_ALLOW(__NR_clock_gettime),
#endif
#ifdef __NR_close
SC_ALLOW(close),
SC_ALLOW(__NR_close),
#endif
#ifdef __NR_exit
SC_ALLOW(exit),
SC_ALLOW(__NR_exit),
#endif
#ifdef __NR_exit_group
SC_ALLOW(exit_group),
SC_ALLOW(__NR_exit_group),
#endif
#ifdef __NR_getpgid
SC_ALLOW(getpgid),
SC_ALLOW(__NR_getpgid),
#endif
#ifdef __NR_getpid
SC_ALLOW(getpid),
SC_ALLOW(__NR_getpid),
#endif
#ifdef __NR_getrandom
SC_ALLOW(getrandom),
SC_ALLOW(__NR_getrandom),
#endif
#ifdef __NR_gettimeofday
SC_ALLOW(gettimeofday),
SC_ALLOW(__NR_gettimeofday),
#endif
#ifdef __NR_madvise
SC_ALLOW(madvise),
SC_ALLOW(__NR_madvise),
#endif
#ifdef __NR_mmap
SC_ALLOW(mmap),
SC_ALLOW(__NR_mmap),
#endif
#ifdef __NR_mmap2
SC_ALLOW(mmap2),
SC_ALLOW(__NR_mmap2),
#endif
#ifdef __NR_mremap
SC_ALLOW(mremap),
SC_ALLOW(__NR_mremap),
#endif
#ifdef __NR_munmap
SC_ALLOW(munmap),
SC_ALLOW(__NR_munmap),
#endif
#ifdef __NR__newselect
SC_ALLOW(_newselect),
SC_ALLOW(__NR__newselect),
#endif
#ifdef __NR_poll
SC_ALLOW(poll),
SC_ALLOW(__NR_poll),
#endif
#ifdef __NR_pselect6
SC_ALLOW(pselect6),
SC_ALLOW(__NR_pselect6),
#endif
#ifdef __NR_read
SC_ALLOW(read),
SC_ALLOW(__NR_read),
#endif
#ifdef __NR_rt_sigprocmask
SC_ALLOW(rt_sigprocmask),
SC_ALLOW(__NR_rt_sigprocmask),
#endif
#ifdef __NR_select
SC_ALLOW(select),
SC_ALLOW(__NR_select),
#endif
#ifdef __NR_shutdown
SC_ALLOW(shutdown),
SC_ALLOW(__NR_shutdown),
#endif
#ifdef __NR_sigprocmask
SC_ALLOW(sigprocmask),
SC_ALLOW(__NR_sigprocmask),
#endif
#ifdef __NR_time
SC_ALLOW(time),
SC_ALLOW(__NR_time),
#endif
#ifdef __NR_write
SC_ALLOW(write),
SC_ALLOW(__NR_write),
#endif
#ifdef __NR_socketcall
SC_ALLOW_ARG(socketcall, 0, SYS_SHUTDOWN),
SC_ALLOW_ARG(__NR_socketcall, 0, SYS_SHUTDOWN),
#endif
#if defined(__NR_ioctl) && defined(__s390__)
/* Allow ioctls for ICA crypto card on s390 */
SC_ALLOW_ARG(ioctl, 1, Z90STAT_STATUS_MASK),
SC_ALLOW_ARG(ioctl, 1, ICARSAMODEXPO),
SC_ALLOW_ARG(ioctl, 1, ICARSACRT),
SC_ALLOW_ARG(__NR_ioctl, 1, Z90STAT_STATUS_MASK),
SC_ALLOW_ARG(__NR_ioctl, 1, ICARSAMODEXPO),
SC_ALLOW_ARG(__NR_ioctl, 1, ICARSACRT),
#endif /* defined(__NR_ioctl) && defined(__s390__) */
/* Default deny */