# This file is used to populate seccomp's allowlist policy in combination with SYSCALLS.TXT.
# Note that the resultant policy is applied only to zygote spawned processes.
#
# The final seccomp allowlist is SYSCALLS.TXT - SECCOMP_BLOCKLIST.TXT + SECCOMP_ALLOWLIST.TXT
# Any entry in the blocklist must be in the syscalls file and not be in the allowlist file
#
# This file is processed by a python script named genseccomp.py.

# Note: Some privileged syscalls are still needed in app process after fork before uid change,
# including capset and setresuid. This is because the seccomp filter must be installed while
# the process still has CAP_SYS_ADMIN; changing the uid would remove that capability.

# syscalls to modify IDs
int     setgid:setgid32(gid_t)     lp32
int     setgid:setgid(gid_t)       lp64
int     setuid:setuid32(uid_t)    lp32
int     setuid:setuid(uid_t)      lp64
int     setregid:setregid32(gid_t, gid_t)  lp32
int     setregid:setregid(gid_t, gid_t)    lp64
int     setreuid:setreuid32(uid_t, uid_t)   lp32
int     setreuid:setreuid(uid_t, uid_t)     lp64
int     setresgid:setresgid32(gid_t, gid_t, gid_t)   lp32
int     setresgid:setresgid(gid_t, gid_t, gid_t)     lp64
# setresuid is explicitly allowed, see above.
int     setfsgid:setfsgid32(gid_t) lp32
int     setfsgid:setfsgid(gid_t)   lp64
int     setfsuid:setfsuid32(uid_t) lp32
int     setfsuid:setfsuid(uid_t)   lp64
int     setgroups:setgroups32(int, const gid_t*)   lp32
int     setgroups:setgroups(int, const gid_t*)     lp64

# syscalls to modify times
int     adjtimex(struct timex*)   all
int     clock_adjtime(clockid_t, struct timex*)   all
int     clock_settime(clockid_t, const struct timespec*)  all
int     settimeofday(const struct timeval*, const struct timezone*)   all

int     acct(const char*  filepath)  all
int     klogctl:syslog(int, char*, int)   all
int     chroot(const char*)  all

# syscalls to change machine various configurations
int     init_module(void*, unsigned long, const char*)  all
int     delete_module(const char*, unsigned int)   all
int     mount(const char*, const char*, const char*, unsigned long, const void*)  all
int     umount2(const char*, int)  all
int     swapon(const char*, int) all
int     swapoff(const char*) all
int     setdomainname(const char*, size_t)  all
int     sethostname(const char*, size_t)  all
int     __reboot:reboot(int, int, int, void*)  all