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Kernel: Use Userspace<T> for the getsockopt syscall and Socket interface

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The way getsockopt is implemented for socket types requires us to push
down Userspace<T> using into those interfaces. This change does so, and
utilizes proper copy implementations instead of the kind of haphazard
pointer dereferencing that was occurring there before.
This commit is contained in:
Brian Gianforcaro 2020-08-07 02:29:05 -07:00 • committed by Andreas Kling
parent 6920d5f423
commit 30b2c0dc85
9 changed files with 69 additions and 43 deletions
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26
Kernel/Syscalls/socket.cpp
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@ -316,22 +316,24 @@ int Process::sys$getpeername(Userspace<const Syscall::SC_getpeername_params*> us
return get_sock_or_peer_name<false>(params);
}
int Process::sys$getsockopt(const Syscall::SC_getsockopt_params* params)
int Process::sys$getsockopt(Userspace<const Syscall::SC_getsockopt_params*> user_params)
{
if (!validate_read_typed(params))
Syscall::SC_getsockopt_params params;
if (!validate_read_and_copy_typed(&params, user_params))
return -EFAULT;
SmapDisabler disabler;
int sockfd = params.sockfd;
int level = params.level;
int option = params.option;
Userspace<void*> user_value = params.value;
Userspace<socklen_t*> user_value_size = params.value_size;
int sockfd = params->sockfd;
int level = params->level;
int option = params->option;
void* value = params->value;
socklen_t* value_size = params->value_size;
if (!validate_write_typed(value_size))
if (!validate_write_typed(user_value_size))
return -EFAULT;
if (!validate_write(value, *value_size))
socklen_t value_size;
if (!validate_read_and_copy_typed(&value_size, user_value_size))
return -EFAULT;
if (!validate_write(user_value, value_size))
return -EFAULT;
auto description = file_description(sockfd);
if (!description)
@ -345,7 +347,7 @@ int Process::sys$getsockopt(const Syscall::SC_getsockopt_params* params)
} else {
REQUIRE_PROMISE_FOR_SOCKET_DOMAIN(socket.domain());
}
return socket.getsockopt(*description, level, option, value, value_size);
return socket.getsockopt(*description, level, option, user_value, user_value_size);
}
int Process::sys$setsockopt(Userspace<const Syscall::SC_setsockopt_params*> user_params)