mirrors/suyu
1
0
Fork 0
mirror of https://git.suyu.dev/suyu/suyu.git synced 2024-11-15 22:54:00 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

kernel/svc: Sanitize addresses and sizes within svcMapMemory() and svcUnmapMemory()

Browse source 
The kernel checks if the addresses and given size is 4KB aligned before
continuing onwards to map the memory.
This commit is contained in:
Lioncash 2018-09-13 19:14:50 -04:00
parent 7bd2faad9a
commit 496c67fd73
1 changed files with 23 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

23
src/core/hle/kernel/svc.cpp
View file

@ -35,6 +35,11 @@
#include "core/hle/service/service.h"
namespace Kernel {
namespace {
constexpr bool Is4KBAligned(VAddr address) {
return (address & 0xFFF) == 0;
}
} // Anonymous namespace
/// Set the process heap to a given Size. It can both extend and shrink the heap.
static ResultCode SetHeapSize(VAddr* heap_addr, u64 heap_size) {
@ -62,6 +67,15 @@ static ResultCode SetMemoryAttribute(VAddr addr, u64 size, u32 state0, u32 state
static ResultCode MapMemory(VAddr dst_addr, VAddr src_addr, u64 size) {
LOG_TRACE(Kernel_SVC, "called, dst_addr=0x{:X}, src_addr=0x{:X}, size=0x{:X}", dst_addr,
src_addr, size);
if (!Is4KBAligned(dst_addr) || !Is4KBAligned(src_addr)) {
return ERR_INVALID_ADDRESS;
}
if (size == 0 || !Is4KBAligned(size)) {
return ERR_INVALID_SIZE;
}
return Core::CurrentProcess()->MirrorMemory(dst_addr, src_addr, size);
}
@ -69,6 +83,15 @@ static ResultCode MapMemory(VAddr dst_addr, VAddr src_addr, u64 size) {
static ResultCode UnmapMemory(VAddr dst_addr, VAddr src_addr, u64 size) {
LOG_TRACE(Kernel_SVC, "called, dst_addr=0x{:X}, src_addr=0x{:X}, size=0x{:X}", dst_addr,
src_addr, size);
if (!Is4KBAligned(dst_addr) || !Is4KBAligned(src_addr)) {
return ERR_INVALID_ADDRESS;
}
if (size == 0 || !Is4KBAligned(size)) {
return ERR_INVALID_SIZE;
}
return Core::CurrentProcess()->UnmapMemory(dst_addr, src_addr, size);
}