From 247cd92216160dd020464d57a28aa3c1ce731095 Mon Sep 17 00:00:00 2001
From: Morph <39850852+Morph1984@users.noreply.github.com>
Date: Thu, 27 May 2021 23:13:39 -0400
Subject: applets/swkbd: Only read the text check message on Failure/Confirm

Applications may leave this region of memory uninitialized when the text check result is not either Failure or Confirm.
Attempting to read uninitialized memory may cause an exception within the UTF16 to UTF8 string converter.
Fix this by only reading the text check message on Failure or Confirm.
---
 src/core/hle/service/am/applets/software_keyboard.cpp | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

(limited to 'src/core')

diff --git a/src/core/hle/service/am/applets/software_keyboard.cpp b/src/core/hle/service/am/applets/software_keyboard.cpp
index b05a5da04..a1027a9ad 100644
--- a/src/core/hle/service/am/applets/software_keyboard.cpp
+++ b/src/core/hle/service/am/applets/software_keyboard.cpp
@@ -273,8 +273,13 @@ void SoftwareKeyboard::ProcessTextCheck() {
 
     std::memcpy(&swkbd_text_check, text_check_data.data(), sizeof(SwkbdTextCheck));
 
-    std::u16string text_check_message = Common::UTF16StringFromFixedZeroTerminatedBuffer(
-        swkbd_text_check.text_check_message.data(), swkbd_text_check.text_check_message.size());
+    std::u16string text_check_message =
+        swkbd_text_check.text_check_result == SwkbdTextCheckResult::Failure ||
+                swkbd_text_check.text_check_result == SwkbdTextCheckResult::Confirm
+            ? Common::UTF16StringFromFixedZeroTerminatedBuffer(
+                  swkbd_text_check.text_check_message.data(),
+                  swkbd_text_check.text_check_message.size())
+            : u"";
 
     LOG_INFO(Service_AM, "\nTextCheckResult: {}\nTextCheckMessage: {}",
              GetTextCheckResultName(swkbd_text_check.text_check_result),
-- 
cgit v1.2.3


From c68255f70f2f91769a6b7d8bac4cbb1f80c4004b Mon Sep 17 00:00:00 2001
From: Morph <39850852+Morph1984@users.noreply.github.com>
Date: Thu, 27 May 2021 23:22:38 -0400
Subject: applets/swkbd: Make use of std::move where applicable

Avoids redundant string copies
---
 src/core/hle/service/am/applets/software_keyboard.cpp | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

(limited to 'src/core')

diff --git a/src/core/hle/service/am/applets/software_keyboard.cpp b/src/core/hle/service/am/applets/software_keyboard.cpp
index a1027a9ad..b1a81810b 100644
--- a/src/core/hle/service/am/applets/software_keyboard.cpp
+++ b/src/core/hle/service/am/applets/software_keyboard.cpp
@@ -290,10 +290,10 @@ void SoftwareKeyboard::ProcessTextCheck() {
         SubmitNormalOutputAndExit(SwkbdResult::Ok, current_text);
         break;
     case SwkbdTextCheckResult::Failure:
-        ShowTextCheckDialog(SwkbdTextCheckResult::Failure, text_check_message);
+        ShowTextCheckDialog(SwkbdTextCheckResult::Failure, std::move(text_check_message));
         break;
     case SwkbdTextCheckResult::Confirm:
-        ShowTextCheckDialog(SwkbdTextCheckResult::Confirm, text_check_message);
+        ShowTextCheckDialog(SwkbdTextCheckResult::Confirm, std::move(text_check_message));
         break;
     case SwkbdTextCheckResult::Silent:
     default:
@@ -487,7 +487,7 @@ void SoftwareKeyboard::InitializeFrontendKeyboard() {
             max_text_length <= 32 ? SwkbdTextDrawType::Line : SwkbdTextDrawType::Box;
 
         Core::Frontend::KeyboardInitializeParameters initialize_parameters{
-            .ok_text{ok_text},
+            .ok_text{std::move(ok_text)},
             .header_text{},
             .sub_text{},
             .guide_text{},
@@ -563,10 +563,10 @@ void SoftwareKeyboard::InitializeFrontendKeyboard() {
                                                : false;
 
         Core::Frontend::KeyboardInitializeParameters initialize_parameters{
-            .ok_text{ok_text},
-            .header_text{header_text},
-            .sub_text{sub_text},
-            .guide_text{guide_text},
+            .ok_text{std::move(ok_text)},
+            .header_text{std::move(header_text)},
+            .sub_text{std::move(sub_text)},
+            .guide_text{std::move(guide_text)},
             .initial_text{initial_text},
             .max_text_length{max_text_length},
             .min_text_length{min_text_length},
@@ -595,7 +595,7 @@ void SoftwareKeyboard::ShowNormalKeyboard() {
 
 void SoftwareKeyboard::ShowTextCheckDialog(SwkbdTextCheckResult text_check_result,
                                            std::u16string text_check_message) {
-    frontend.ShowTextCheckDialog(text_check_result, text_check_message);
+    frontend.ShowTextCheckDialog(text_check_result, std::move(text_check_message));
 }
 
 void SoftwareKeyboard::ShowInlineKeyboard() {
-- 
cgit v1.2.3