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Kernel: Tighten up some promise checks

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Since we're not keeping compatibility with OpenBSD about what promises are
required for which syscalls, tighten things up so that they make more sense.
This commit is contained in:
Sergey Bugaev 2020-05-31 21:58:06 +03:00 committed by Andreas Kling
parent a77405665f
commit 05b7fec517
Notes: sideshowbarker 2024-07-19 05:55:22 +09:00 
Author: https://github.com/bugaevc
Commit: https://github.com/SerenityOS/serenity/commit/05b7fec5174
Pull-request: https://github.com/SerenityOS/serenity/pull/2468
2 changed files with 5 additions and 10 deletions
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10
Kernel/Process.cpp
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@ -703,7 +703,7 @@ int Process::sys$gethostname(char* buffer, ssize_t size)
int Process::sys$sethostname(const char* hostname, ssize_t length)
{
REQUIRE_PROMISE(stdio);
REQUIRE_NO_PROMISES;
if (!is_superuser())
return -EPERM;
if (length < 0)
@ -2495,7 +2495,7 @@ KResultOr<siginfo_t> Process::do_waitid(idtype_t idtype, int id, int options)
pid_t Process::sys$waitid(const Syscall::SC_waitid_params* user_params)
{
REQUIRE_PROMISE(stdio);
REQUIRE_PROMISE(proc);
Syscall::SC_waitid_params params;
if (!validate_read_and_copy_typed(&params, user_params))
@ -2545,7 +2545,7 @@ bool Process::validate_write(void* address, size_t size) const
pid_t Process::sys$getsid(pid_t pid)
{
REQUIRE_PROMISE(stdio);
REQUIRE_PROMISE(proc);
if (pid == 0)
return m_sid;
InterruptDisabler disabler;
@ -2576,7 +2576,7 @@ pid_t Process::sys$setsid()
pid_t Process::sys$getpgid(pid_t pid)
{
REQUIRE_PROMISE(stdio);
REQUIRE_PROMISE(proc);
if (pid == 0)
return m_pgid;
InterruptDisabler disabler; // FIXME: Use a ProcessHandle
@ -2677,7 +2677,7 @@ int Process::sys$dup2(int old_fd, int new_fd)
int Process::sys$sigprocmask(int how, const sigset_t* set, sigset_t* old_set)
{
REQUIRE_PROMISE(stdio);
REQUIRE_PROMISE(sigaction);
if (old_set) {
if (!validate_write_typed(old_set))
return -EFAULT;

5
Userland/hostname.cpp
View file

@ -31,11 +31,6 @@
int main(int argc, char** argv)
{
if (pledge("stdio", nullptr) < 0) {
perror("pledge");
return 1;
}
if (argc == 1) {
char buffer[HOST_NAME_MAX];
int rc = gethostname(buffer, sizeof(buffer));