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Kernel: Remove pledge exception for sys$getsockopt() with SO_PEERCRED

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We had an exception that allowed SOL_SOCKET + SO_PEERCRED on local
socket to support LibIPC's PID exchange mechanism. This is no longer
needed so let's just remove the exception.
This commit is contained in:
Andreas Kling 2021-01-31 09:27:36 +01:00
parent 1b5be4a342
commit 6e4e3a7612
2 changed files with 2 additions and 6 deletions
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2
Base/usr/share/man/man2/pledge.md
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@ -38,7 +38,7 @@ If the process later attempts to use any system functionality it has previously
* `exec`: The [`exec(2)`](exec.md) syscall
* `unix`: UNIX local domain sockets
* `inet`: IPv4 domain sockets
* `accept`: May use [`accept(2)`](accept.md) to accept incoming socket connections on already listening sockets. It also allows [`getsockopt(2)`](getsockopt.md) with `SOL_SOCKET` and `SO_PEERCRED` on local sockets (\*)
* `accept`: May use [`accept(2)`](accept.md) to accept incoming socket connections on already listening sockets (\*)
* `rpath`: "Read" filesystem access
* `wpath`: "Write" filesystem access
* `cpath`: "Create" filesystem access

6
Kernel/Syscalls/socket.cpp
View file

@ -362,11 +362,7 @@ int Process::sys$getsockopt(Userspace<const Syscall::SC_getsockopt_params*> user
return -ENOTSOCK;
auto& socket = *description->socket();
if (has_promised(Pledge::accept) && socket.is_local() && level == SOL_SOCKET && option == SO_PEERCRED) {
// We make an exception for SOL_SOCKET::SO_PEERCRED on local sockets if you've pledged "accept"
} else {
REQUIRE_PROMISE_FOR_SOCKET_DOMAIN(socket.domain());
}
REQUIRE_PROMISE_FOR_SOCKET_DOMAIN(socket.domain());
return socket.getsockopt(*description, level, option, user_value, user_value_size);
}