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Code Issues 1 Releases Wiki Activity

Add sanboxing for signal handling.

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This commit is contained in:
Calvin Rose 2023-08-19 17:44:04 -05:00
parent 08e20e912d
commit 7198dcb416
3 changed files with 4 additions and 0 deletions
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2
src/core/corelib.c
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@ -741,6 +741,7 @@ static const SandboxOption sandbox_options[] = {
{"net-connect", JANET_SANDBOX_NET_CONNECT},
{"net-listen", JANET_SANDBOX_NET_LISTEN},
{"sandbox", JANET_SANDBOX_SANDBOX},
{"signal", JANET_SANDBOX_SIGNAL},
{"subprocess", JANET_SANDBOX_SUBPROCESS},
{NULL, 0}
};
@ -765,6 +766,7 @@ JANET_CORE_FN(janet_core_sandbox,
"* :net-connect - disallow making outbound network connections\n"
"* :net-listen - disallow accepting inbound network connections\n"
"* :sandbox - disallow calling this function\n"
"* :signal - disallow adding or removing signal handlers\n"
"* :subprocess - disallow running subprocesses") {
uint32_t flags = 0;
for (int32_t i = 0; i < argc; i++) {

1
src/core/os.c
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@ -854,6 +854,7 @@ static void janet_signal_trampoline(int sig) {
JANET_CORE_FN(os_sigaction,
"(os/sigaction which &opt handler interrupt-interpreter)",
"Add a signal handler for a given action. Use nil for the `handler` argument to remove a signal handler.") {
janet_sandbox_assert(JANET_SANDBOX_SIGNAL);
janet_arity(argc, 1, 3);
#ifdef JANET_WINDOWS
janet_panic("unsupported on this platform");

1
src/include/janet.h
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@ -1822,6 +1822,7 @@ JANET_API void janet_stacktrace_ext(JanetFiber *fiber, Janet err, const char *pr
#define JANET_SANDBOX_FS_TEMP 1024
#define JANET_SANDBOX_FFI_USE 2048
#define JANET_SANDBOX_FFI_JIT 4096
#define JANET_SANDBOX_SIGNAL 8192
#define JANET_SANDBOX_FFI (JANET_SANDBOX_FFI_DEFINE | JANET_SANDBOX_FFI_USE | JANET_SANDBOX_FFI_JIT)
#define JANET_SANDBOX_FS (JANET_SANDBOX_FS_WRITE | JANET_SANDBOX_FS_READ | JANET_SANDBOX_FS_TEMP)
#define JANET_SANDBOX_NET (JANET_SANDBOX_NET_CONNECT | JANET_SANDBOX_NET_LISTEN)