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Kernel: Make Process::current() return a Process& instead of Process*

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This has several benefits:
1) We no longer just blindly derefence a null pointer in various places
2) We will get nicer runtime error messages if the current process does
turn out to be null in the call location
3) GCC no longer complains about possible nullptr dereferences when
compiling without KUBSAN
This commit is contained in:
Idan Horowitz
2021-08-19 22:45:07 +03:00
committed by Andreas Kling
parent 1259dc3623
commit cf271183b4
26 changed files with 142 additions and 141 deletions
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14
Kernel/Net/IPv4Socket.cpp
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@@ -118,9 +118,9 @@ KResult IPv4Socket::bind(Userspace<const sockaddr*> user_address, socklen_t addr
return set_so_error(EINVAL);
auto requested_local_port = ntohs(address.sin_port);
if (!Process::current()->is_superuser()) {
if (!Process::current().is_superuser()) {
if (requested_local_port > 0 && requested_local_port < 1024) {
dbgln("UID {} attempted to bind {} to port {}", Process::current()->uid(), class_name(), requested_local_port);
dbgln("UID {} attempted to bind {} to port {}", Process::current().uid(), class_name(), requested_local_port);
return set_so_error(EACCES);
}
}
@@ -603,7 +603,7 @@ KResult IPv4Socket::ioctl(FileDescription&, unsigned request, Userspace<void*> a
switch (request) {
case SIOCADDRT:
if (!Process::current()->is_superuser())
if (!Process::current().is_superuser())
return EPERM;
if (route.rt_gateway.sa_family != AF_INET)
return EAFNOSUPPORT;
@@ -628,7 +628,7 @@ KResult IPv4Socket::ioctl(FileDescription&, unsigned request, Userspace<void*> a
switch (request) {
case SIOCSARP:
if (!Process::current()->is_superuser())
if (!Process::current().is_superuser())
return EPERM;
if (arp_req.arp_pa.sa_family != AF_INET)
return EAFNOSUPPORT;
@@ -636,7 +636,7 @@ KResult IPv4Socket::ioctl(FileDescription&, unsigned request, Userspace<void*> a
return KSuccess;
case SIOCDARP:
if (!Process::current()->is_superuser())
if (!Process::current().is_superuser())
return EPERM;
if (arp_req.arp_pa.sa_family != AF_INET)
return EAFNOSUPPORT;
@@ -663,7 +663,7 @@ KResult IPv4Socket::ioctl(FileDescription&, unsigned request, Userspace<void*> a
switch (request) {
case SIOCSIFADDR:
if (!Process::current()->is_superuser())
if (!Process::current().is_superuser())
return EPERM;
if (ifr.ifr_addr.sa_family != AF_INET)
return EAFNOSUPPORT;
@@ -671,7 +671,7 @@ KResult IPv4Socket::ioctl(FileDescription&, unsigned request, Userspace<void*> a
return KSuccess;
case SIOCSIFNETMASK:
if (!Process::current()->is_superuser())
if (!Process::current().is_superuser())
return EPERM;
if (ifr.ifr_addr.sa_family != AF_INET)
return EAFNOSUPPORT;