# This file is used to populate seccomp's whitelist policy in combination with SYSCALLS.TXT.
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# Note that the resultant policy is applied only to zygote spawned processes.
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#
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# The final seccomp whitelist is SYSCALLS.TXT - SECCOMP_BLACKLIST.TXT + SECCOMP_WHITELIST.TXT
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# Any entry in the blacklist must be in the syscalls file and not be in the whitelist file
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#
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# Each non-blank, non-comment line has the following format:
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#
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# return_type func_name[|alias_list][:syscall_name[:socketcall_id]]([parameter_list]) arch_list
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#
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# where:
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# arch_list ::= "all" | arch+
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# arch ::= "arm" | "arm64" | "mips" | "mips64" | "x86" | "x86_64"
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#
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# Note:
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# - syscall_name corresponds to the name of the syscall, which may differ from
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# the exported function name (example: the exit syscall is implemented by the _exit()
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# function, which is not the same as the standard C exit() function which calls it)
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|
# - alias_list is optional comma separated list of function aliases
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#
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# - The call_id parameter, given that func_name and syscall_name have
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# been provided, allows the user to specify dispatch style syscalls.
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# For example, socket() syscall on i386 actually becomes:
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# socketcall(__NR_socket, 1, *(rest of args on stack)).
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#
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# - Each parameter type is assumed to be stored in 32 bits.
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#
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# 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,
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# including capset and setresuid. This is because the seccomp filter must be installed while
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# the process still has CAP_SYS_ADMIN; changing the uid would remove that capability.
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# syscalls to modify IDs
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int setgid:setgid32(gid_t) arm,x86
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int setgid:setgid(gid_t) arm64,mips,mips64,x86_64
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int setuid:setuid32(uid_t) arm,x86
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int setuid:setuid(uid_t) arm64,mips,mips64,x86_64
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int setregid:setregid32(gid_t, gid_t) arm,x86
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int setregid:setregid(gid_t, gid_t) arm64,mips,mips64,x86_64
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int setreuid:setreuid32(uid_t, uid_t) arm,x86
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int setreuid:setreuid(uid_t, uid_t) arm64,mips,mips64,x86_64
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int setresgid:setresgid32(gid_t, gid_t, gid_t) arm,x86
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int setresgid:setresgid(gid_t, gid_t, gid_t) arm64,mips,mips64,x86_64
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# setresuid is explicitly allowed, see above.
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int setfsgid(gid_t) all
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int setfsuid(uid_t) all
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int setgroups:setgroups32(int, const gid_t*) arm,x86
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int setgroups:setgroups(int, const gid_t*) arm64,mips,mips64,x86_64
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# syscalls to modify times
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int adjtimex(struct timex*) all
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int clock_adjtime(clockid_t, struct timex*) all
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int clock_settime(clockid_t, const struct timespec*) all
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int settimeofday(const struct timeval*, const struct timezone*) all
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int acct(const char* filepath) all
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int klogctl:syslog(int, char*, int) all
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int chroot(const char*) all
|
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# syscalls to change machine various configurations
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int init_module(void*, unsigned long, const char*) all
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int delete_module(const char*, unsigned int) all
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int mount(const char*, const char*, const char*, unsigned long, const void*) all
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int umount2(const char*, int) all
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int swapon(const char*, int) all
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int swapoff(const char*) all
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int setdomainname(const char*, size_t) all
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int sethostname(const char*, size_t) all
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int __reboot:reboot(int, int, int, void*) all
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