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Kernel: Truncate addresses stored by getsockname() and getpeername()

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If there's not enough space in the output buffer for the whole sockaddr
we now simply truncate the address instead of returning EINVAL.

This patch also makes getpeername() actually return the peer address
rather than the local address.. :^)
This commit is contained in:
Andreas Kling
2020-02-07 23:42:28 +01:00
parent d34ad44f90
commit d04fcccc90
6 changed files with 23 additions and 38 deletions
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12
Kernel/Process.cpp
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@@ -3190,8 +3190,7 @@ int Process::sys$accept(int accepting_socket_fd, sockaddr* address, socklen_t* a
}
auto accepted_socket = socket.accept();
ASSERT(accepted_socket);
bool success = accepted_socket->get_peer_address(address, address_size);
ASSERT(success);
accepted_socket->get_peer_address(address, address_size);
auto accepted_socket_description = FileDescription::create(*accepted_socket);
accepted_socket_description->set_readable(true);
accepted_socket_description->set_writable(true);
@@ -3318,11 +3317,12 @@ int Process::get_sock_or_peer_name(const Params& params)
u8 address_buffer[sizeof(sockaddr_un)];
addrlen_value = min(sizeof(sockaddr_un), static_cast<size_t>(addrlen_value));
if (!socket.get_local_address((sockaddr*)address_buffer, &addrlen_value))
return -EINVAL;
if constexpr (sockname)
socket.get_local_address((sockaddr*)address_buffer, &addrlen_value);
else
socket.get_peer_address((sockaddr*)address_buffer, &addrlen_value);
copy_to_user(params.addr, address_buffer, addrlen_value);
copy_to_user(params.addrlen, &addrlen_value);
return 0;
}