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Merge pull request #1523 from lioncash/lock

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svc: Add missing error checks in svcArbitrateLock/svcArbitrateUnlock
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bunnei 2018-10-18 21:50:45 -04:00 committed by GitHub
commit fdd82b754a
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 27 additions and 9 deletions
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12
src/common/alignment.h
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@ -19,4 +19,16 @@ constexpr T AlignDown(T value, std::size_t size) {
return static_cast<T>(value - value % size);
}
template <typename T>
constexpr bool Is4KBAligned(T value) {
static_assert(std::is_unsigned_v<T>, "T must be an unsigned value.");
return (value & 0xFFF) == 0;
}
template <typename T>
constexpr bool IsWordAligned(T value) {
static_assert(std::is_unsigned_v<T>, "T must be an unsigned value.");
return (value & 0b11) == 0;
}
} // namespace Common

24
src/core/hle/kernel/svc.cpp
View File

@ -8,6 +8,7 @@
#include <mutex>
#include <vector>
#include "common/alignment.h"
#include "common/assert.h"
#include "common/logging/log.h"
#include "common/microprofile.h"
@ -36,9 +37,6 @@
namespace Kernel {
namespace {
constexpr bool Is4KBAligned(VAddr address) {
return (address & 0xFFF) == 0;
}
// Checks if address + size is greater than the given address
// This can return false if the size causes an overflow of a 64-bit type
@ -69,11 +67,11 @@ bool IsInsideNewMapRegion(const VMManager& vm, VAddr address, u64 size) {
// in the same order.
ResultCode MapUnmapMemorySanityChecks(const VMManager& vm_manager, VAddr dst_addr, VAddr src_addr,
u64 size) {
if (!Is4KBAligned(dst_addr) || !Is4KBAligned(src_addr)) {
if (!Common::Is4KBAligned(dst_addr) || !Common::Is4KBAligned(src_addr)) {
return ERR_INVALID_ADDRESS;
}
if (size == 0 || !Is4KBAligned(size)) {
if (size == 0 || !Common::Is4KBAligned(size)) {
return ERR_INVALID_SIZE;
}
@ -352,6 +350,10 @@ static ResultCode ArbitrateLock(Handle holding_thread_handle, VAddr mutex_addr,
return ERR_INVALID_ADDRESS_STATE;
}
if (!Common::IsWordAligned(mutex_addr)) {
return ERR_INVALID_ADDRESS;
}
auto& handle_table = Core::System::GetInstance().Kernel().HandleTable();
return Mutex::TryAcquire(handle_table, mutex_addr, holding_thread_handle,
requesting_thread_handle);
@ -365,6 +367,10 @@ static ResultCode ArbitrateUnlock(VAddr mutex_addr) {
return ERR_INVALID_ADDRESS_STATE;
}
if (!Common::IsWordAligned(mutex_addr)) {
return ERR_INVALID_ADDRESS;
}
return Mutex::Release(mutex_addr);
}
@ -570,11 +576,11 @@ static ResultCode MapSharedMemory(Handle shared_memory_handle, VAddr addr, u64 s
"called, shared_memory_handle=0x{:X}, addr=0x{:X}, size=0x{:X}, permissions=0x{:08X}",
shared_memory_handle, addr, size, permissions);
if (!Is4KBAligned(addr)) {
if (!Common::Is4KBAligned(addr)) {
return ERR_INVALID_ADDRESS;
}
if (size == 0 || !Is4KBAligned(size)) {
if (size == 0 || !Common::Is4KBAligned(size)) {
return ERR_INVALID_SIZE;
}
@ -599,11 +605,11 @@ static ResultCode UnmapSharedMemory(Handle shared_memory_handle, VAddr addr, u64
LOG_WARNING(Kernel_SVC, "called, shared_memory_handle=0x{:08X}, addr=0x{:X}, size=0x{:X}",
shared_memory_handle, addr, size);
if (!Is4KBAligned(addr)) {
if (!Common::Is4KBAligned(addr)) {
return ERR_INVALID_ADDRESS;
}
if (size == 0 || !Is4KBAligned(size)) {
if (size == 0 || !Common::Is4KBAligned(size)) {
return ERR_INVALID_SIZE;
}