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drivers/poke: Access the user buffers correctly.

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Untested (as it seems /bin/poke was never added?) but unless I messed
up some of the memcpy arguments, this should work.

Fixes #14429.
This commit is contained in:
Augustin Cavalier
2018-09-01 15:40:50 -04:00
parent 5ae6f34b81
commit 8d13e72523
1 changed files with 92 additions and 51 deletions
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src/add-ons/kernel/drivers/misc/poke.cpp
+92 -51
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@@ -1,5 +1,6 @@
/* /*
* Copyright 2005, Oscar Lesta. All rights reserved. * Copyright 2005, Oscar Lesta. All rights reserved.
* Copyright 2018, Haiku, Inc. All rights reserved.
* Distributed under the terms of the MIT License. * Distributed under the terms of the MIT License.
*/ */
@@ -127,143 +128,183 @@ poke_control(void* cookie, uint32 op, void* arg, size_t length)
switch (op) { switch (op) {
case POKE_PORT_READ: case POKE_PORT_READ:
{ {
status_t result; status_t result = B_OK;
port_io_args* ioctl = (port_io_args*)arg; port_io_args ioctl;
if (ioctl->signature != POKE_SIGNATURE) if (user_memcpy(&ioctl, arg, sizeof(port_io_args)) != B_OK)
return B_BAD_ADDRESS;
if (ioctl.signature != POKE_SIGNATURE)
return B_BAD_VALUE; return B_BAD_VALUE;
result = B_OK; switch (ioctl.size) {
switch (ioctl->size) {
case 1: case 1:
ioctl->value = isa->read_io_8(ioctl->port); ioctl.value = isa->read_io_8(ioctl.port);
break; break;
case 2: case 2:
ioctl->value = isa->read_io_16(ioctl->port); ioctl.value = isa->read_io_16(ioctl.port);
break; break;
case 4: case 4:
ioctl->value = isa->read_io_32(ioctl->port); ioctl.value = isa->read_io_32(ioctl.port);
break; break;
default: default:
result = B_BAD_VALUE; result = B_BAD_VALUE;
} }
if (user_memcpy(arg, &ioctl, sizeof(port_io_args)) != B_OK)
return B_BAD_ADDRESS;
return result; return result;
} }
case POKE_PORT_WRITE: case POKE_PORT_WRITE:
{ {
status_t result; status_t result = B_OK;
port_io_args* ioctl = (port_io_args*)arg; port_io_args ioctl;
if (ioctl->signature != POKE_SIGNATURE) if (user_memcpy(&ioctl, arg, sizeof(port_io_args)) != B_OK)
return B_BAD_ADDRESS;
if (ioctl.signature != POKE_SIGNATURE)
return B_BAD_VALUE; return B_BAD_VALUE;
result = B_OK; switch (ioctl.size) {
switch (ioctl->size) {
case 1: case 1:
isa->write_io_8(ioctl->port, ioctl->value); isa->write_io_8(ioctl.port, ioctl.value);
break; break;
case 2: case 2:
isa->write_io_16(ioctl->port, ioctl->value); isa->write_io_16(ioctl.port, ioctl.value);
break; break;
case 4: case 4:
isa->write_io_32(ioctl->port, ioctl->value); isa->write_io_32(ioctl.port, ioctl.value);
break; break;
default: default:
result = B_BAD_VALUE; result = B_BAD_VALUE;
} }
return result; return result;
} }
case POKE_PORT_INDEXED_READ: case POKE_PORT_INDEXED_READ:
{ {
port_io_args* ioctl = (port_io_args*)arg; port_io_args ioctl;
if (ioctl->signature != POKE_SIGNATURE) if (user_memcpy(&ioctl, arg, sizeof(port_io_args)) != B_OK)
return B_BAD_ADDRESS;
if (ioctl.signature != POKE_SIGNATURE)
return B_BAD_VALUE; return B_BAD_VALUE;
isa->write_io_8(ioctl->port, ioctl->size); isa->write_io_8(ioctl.port, ioctl.size);
ioctl->value = isa->read_io_8(ioctl->port + 1); ioctl.value = isa->read_io_8(ioctl.port + 1);
if (user_memcpy(arg, &ioctl, sizeof(port_io_args)) != B_OK)
return B_BAD_ADDRESS;
return B_OK; return B_OK;
} }
case POKE_PORT_INDEXED_WRITE: case POKE_PORT_INDEXED_WRITE:
{ {
port_io_args* ioctl = (port_io_args*)arg; port_io_args ioctl;
if (ioctl->signature != POKE_SIGNATURE) if (user_memcpy(&ioctl, arg, sizeof(port_io_args)) != B_OK)
return B_BAD_ADDRESS;
if (ioctl.signature != POKE_SIGNATURE)
return B_BAD_VALUE; return B_BAD_VALUE;
isa->write_io_8(ioctl->port, ioctl->size); isa->write_io_8(ioctl.port, ioctl.size);
isa->write_io_8(ioctl->port + 1, ioctl->value); isa->write_io_8(ioctl.port + 1, ioctl.value);
return B_OK; return B_OK;
} }
case POKE_PCI_READ_CONFIG: case POKE_PCI_READ_CONFIG:
{ {
pci_io_args* ioctl = (pci_io_args*)arg; pci_io_args ioctl;
if (ioctl->signature != POKE_SIGNATURE) if (user_memcpy(&ioctl, arg, sizeof(pci_io_args)) != B_OK)
return B_BAD_ADDRESS;
if (ioctl.signature != POKE_SIGNATURE)
return B_BAD_VALUE; return B_BAD_VALUE;
ioctl->value = pci->read_pci_config(ioctl->bus, ioctl->device, ioctl.value = pci->read_pci_config(ioctl.bus, ioctl.device,
ioctl->function, ioctl->offset, ioctl->size); ioctl.function, ioctl.offset, ioctl.size);
if (user_memcpy(arg, &ioctl, sizeof(pci_io_args)) != B_OK)
return B_BAD_ADDRESS;
return B_OK; return B_OK;
} }
case POKE_PCI_WRITE_CONFIG: case POKE_PCI_WRITE_CONFIG:
{ {
pci_io_args* ioctl = (pci_io_args*)arg; pci_io_args ioctl;
if (ioctl->signature != POKE_SIGNATURE) if (user_memcpy(&ioctl, arg, sizeof(pci_io_args)) != B_OK)
return B_BAD_ADDRESS;
if (ioctl.signature != POKE_SIGNATURE)
return B_BAD_VALUE; return B_BAD_VALUE;
pci->write_pci_config(ioctl->bus, ioctl->device, ioctl->function, pci->write_pci_config(ioctl.bus, ioctl.device, ioctl.function,
ioctl->offset, ioctl->size, ioctl->value); ioctl.offset, ioctl.size, ioctl.value);
return B_OK; return B_OK;
} }
case POKE_GET_NTH_PCI_INFO: case POKE_GET_NTH_PCI_INFO:
{ {
pci_info_args* ioctl = (pci_info_args*)arg; pci_info_args ioctl;
if (ioctl->signature != POKE_SIGNATURE) if (user_memcpy(&ioctl, arg, sizeof(pci_info_args)) != B_OK)
return B_BAD_ADDRESS;
if (ioctl.signature != POKE_SIGNATURE)
return B_BAD_VALUE; return B_BAD_VALUE;
ioctl->status = pci->get_nth_pci_info(ioctl->index, ioctl->info); pci_info info;
ioctl.status = pci->get_nth_pci_info(ioctl.index, &info);
if (user_memcpy(ioctl.info, &info, sizeof(pci_info)) != B_OK)
return B_BAD_ADDRESS;
if (user_memcpy(arg, &ioctl, sizeof(pci_info_args)) != B_OK)
return B_BAD_ADDRESS;
return B_OK; return B_OK;
} }
case POKE_GET_PHYSICAL_ADDRESS: case POKE_GET_PHYSICAL_ADDRESS:
{ {
mem_map_args* ioctl = (mem_map_args*)arg; mem_map_args ioctl;
if (user_memcpy(&ioctl, arg, sizeof(mem_map_args)) != B_OK)
return B_BAD_ADDRESS;
physical_entry table; physical_entry table;
status_t result; status_t result;
if (ioctl->signature != POKE_SIGNATURE) if (ioctl.signature != POKE_SIGNATURE)
return B_BAD_VALUE; return B_BAD_VALUE;
result = get_memory_map(ioctl->address, ioctl->size, &table, 1); result = get_memory_map(ioctl.address, ioctl.size, &table, 1);
ioctl->physical_address = (void*)(addr_t)table.address; ioctl.physical_address = (void*)(addr_t)table.address;
// TODO: mem_map_args::physical_address should be phys_addr_t! // TODO: mem_map_args::physical_address should be phys_addr_t!
ioctl->size = table.size; ioctl.size = table.size;
if (user_memcpy(arg, &ioctl, sizeof(mem_map_args)) != B_OK)
return B_BAD_ADDRESS;
return result; return result;
} }
case POKE_MAP_MEMORY: case POKE_MAP_MEMORY:
{ {
mem_map_args* ioctl = (mem_map_args*)arg; mem_map_args ioctl;
if (ioctl->signature != POKE_SIGNATURE) if (user_memcpy(&ioctl, arg, sizeof(mem_map_args)) != B_OK)
return B_BAD_ADDRESS;
if (ioctl.signature != POKE_SIGNATURE)
return B_BAD_VALUE; return B_BAD_VALUE;
ioctl->area = map_physical_memory(ioctl->name, char name[B_OS_NAME_LENGTH];
(addr_t)ioctl->physical_address, ioctl->size, ioctl->flags, if (user_strlcpy(name, ioctl.name, B_OS_NAME_LENGTH) != B_OK)
ioctl->protection, (void**)&ioctl->address); return B_BAD_ADDRESS;
return ioctl->area;
ioctl.area = map_physical_memory(name,
(addr_t)ioctl.physical_address, ioctl.size, ioctl.flags,
ioctl.protection, (void**)&ioctl.address);
if (user_memcpy(arg, &ioctl, sizeof(mem_map_args)) != B_OK)
return B_BAD_ADDRESS;
return ioctl.area;
} }
case POKE_UNMAP_MEMORY: case POKE_UNMAP_MEMORY:
{ {
mem_map_args* ioctl = (mem_map_args*)arg; mem_map_args ioctl;
if (ioctl->signature != POKE_SIGNATURE) if (user_memcpy(&ioctl, arg, sizeof(mem_map_args)) != B_OK)
return B_BAD_ADDRESS;
if (ioctl.signature != POKE_SIGNATURE)
return B_BAD_VALUE; return B_BAD_VALUE;
return delete_area(ioctl->area); return delete_area(ioctl.area);
} }
} }