[PATCH] MdeModulePkg/CapsuleApp: Fix memory leak issue.

* [PATCH] MdeModulePkg/CapsuleApp: Fix memory leak issue.
@ 2019-02-11  6:16 Chen A Chen
  2019-02-11 12:58 ` Wu, Hao A
  2019-02-11 13:56 ` Zhang, Chao B
  0 siblings, 2 replies; 3+ messages in thread
From: Chen A Chen @ 2019-02-11  6:16 UTC (permalink / raw)
  To: edk2-devel; +Cc: Chen A Chen, Jian J Wang, Hao Wu, Zhang Chao B, Liming Gao

This issue is caused by FileInfoBuffer variable. This is a pointer array
and each elements also pointer to a memory buffer that is allocated and
returned by AllocateCopyPool function.

Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Hao Wu <hao.a.wu@intel.com>
Cc: Zhang Chao B <chao.b.zhang@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Chen A Chen <chen.a.chen@intel.com>
---
 MdeModulePkg/Application/CapsuleApp/CapsuleDump.c | 81 ++++++++++++++++-------
 1 file changed, 56 insertions(+), 25 deletions(-)

diff --git a/MdeModulePkg/Application/CapsuleApp/CapsuleDump.c b/MdeModulePkg/Application/CapsuleApp/CapsuleDump.c
index 7bef5a1378..00cf45d66a 100644
--- a/MdeModulePkg/Application/CapsuleApp/CapsuleDump.c
+++ b/MdeModulePkg/Application/CapsuleApp/CapsuleDump.c
@@ -806,48 +806,69 @@ DumpCapsuleFromDisk (
   Status = Fs->OpenVolume (Fs, &Root);
   if (EFI_ERROR (Status)) {
     Print (L"Cannot open volume. Status = %r\n", Status);
-    return EFI_NOT_FOUND;
+    goto Done;
   }
 
   Status = Root->Open (Root, &DirHandle, EFI_CAPSULE_FILE_DIRECTORY, EFI_FILE_MODE_READ | EFI_FILE_MODE_WRITE , 0);
   if (EFI_ERROR (Status)) {
     Print (L"Cannot open %s. Status = %r\n", EFI_CAPSULE_FILE_DIRECTORY, Status);
-    return EFI_NOT_FOUND;
+    goto Done;
   }
 
   //
   // Get file count first
   //
-  for ( Status = FileHandleFindFirstFile (DirHandle, &FileInfo)
-      ; !EFI_ERROR(Status) && !NoFile
-      ; Status = FileHandleFindNextFile (DirHandle, FileInfo, &NoFile)
-     ){
-    if ((FileInfo->Attribute & (EFI_FILE_SYSTEM | EFI_FILE_ARCHIVE)) == 0) {
-      continue;
+  do {
+    Status = FileHandleFindFirstFile (DirHandle, &FileInfo);
+    if (EFI_ERROR (Status) || FileInfo == NULL) {
+      Print (L"Get File Info Fail. Status = %r\n", Status);
+      goto Done;
     }
-    FileCount++;
-  }
+
+    if ((FileInfo->Attribute & (EFI_FILE_SYSTEM | EFI_FILE_ARCHIVE)) != 0) {
+      FileCount++;
+    }
+
+    Status = FileHandleFindNextFile (DirHandle, FileInfo, &NoFile);
+    if (EFI_ERROR (Status)) {
+      Print (L"Get Next File Fail. Status = %r\n", Status);
+      goto Done;
+    }
+  } while (!NoFile);
 
   if (FileCount == 0) {
     Print (L"Error: No capsule file found!\n");
-    return EFI_NOT_FOUND;
+    Status = EFI_NOT_FOUND;
+    goto Done;
   }
 
   FileInfoBuffer = AllocatePool (sizeof(FileInfo) * FileCount);
+  if (FileInfoBuffer == NULL) {
+    Status = EFI_OUT_OF_RESOURCES;
+    goto Done;
+  }
   NoFile = FALSE;
 
   //
   // Get all file info
   //
-  for ( Status = FileHandleFindFirstFile (DirHandle, &FileInfo)
-      ; !EFI_ERROR (Status) && !NoFile
-      ; Status = FileHandleFindNextFile (DirHandle, FileInfo, &NoFile)
-     ){
-    if ((FileInfo->Attribute & (EFI_FILE_SYSTEM | EFI_FILE_ARCHIVE)) == 0) {
-      continue;
+  do {
+    Status = FileHandleFindFirstFile (DirHandle, &FileInfo);
+    if (EFI_ERROR (Status) || FileInfo == NULL) {
+      Print (L"Get File Info Fail. Status = %r\n", Status);
+      goto Done;
     }
-    FileInfoBuffer[Index++] = AllocateCopyPool ((UINTN)FileInfo->Size, FileInfo);
-  }
+
+    if ((FileInfo->Attribute & (EFI_FILE_SYSTEM | EFI_FILE_ARCHIVE)) != 0) {
+      FileInfoBuffer[Index++] = AllocateCopyPool ((UINTN)FileInfo->Size, FileInfo);
+    }
+
+    Status = FileHandleFindNextFile (DirHandle, FileInfo, &NoFile);
+    if (EFI_ERROR (Status)) {
+      Print (L"Get Next File Fail. Status = %r\n", Status);
+      goto Done;
+    }
+  } while (!NoFile);
 
   //
   // Sort FileInfoBuffer by alphabet order
@@ -866,7 +887,8 @@ DumpCapsuleFromDisk (
   }
 
   if (!DumpCapsuleInfo) {
-    return EFI_SUCCESS;
+    Status = EFI_SUCCESS;
+    goto Done;
   }
 
   Print(L"The infomation of the capsules:\n");
@@ -875,19 +897,20 @@ DumpCapsuleFromDisk (
     FileHandle = NULL;
     Status = DirHandle->Open (DirHandle, &FileHandle, FileInfoBuffer[Index]->FileName, EFI_FILE_MODE_READ, 0);
     if (EFI_ERROR (Status)) {
-      break;
+      goto Done;
     }
 
     Status = FileHandleGetSize (FileHandle, (UINT64 *) &FileSize);
     if (EFI_ERROR (Status)) {
       Print (L"Cannot read file %s. Status = %r\n", FileInfoBuffer[Index]->FileName, Status);
       FileHandleClose (FileHandle);
-      return Status;
+      goto Done;
     }
 
     FileBuffer = AllocatePool (FileSize);
     if (FileBuffer == NULL) {
-      return RETURN_OUT_OF_RESOURCES;
+      Status = EFI_OUT_OF_RESOURCES;
+      goto Done;
     }
 
     Status = FileHandleRead (FileHandle, &FileSize, FileBuffer);
@@ -895,7 +918,7 @@ DumpCapsuleFromDisk (
       Print (L"Cannot read file %s. Status = %r\n", FileInfoBuffer[Index]->FileName, Status);
       FreePool (FileBuffer);
       FileHandleClose (FileHandle);
-      return Status;
+      goto Done;
     }
 
     Print (L"**************************\n");
@@ -906,7 +929,15 @@ DumpCapsuleFromDisk (
     FreePool (FileBuffer);
   }
 
-  return EFI_SUCCESS;
+Done:
+  if (FileInfoBuffer != NULL) {
+    for (Index = 0; Index < FileCount; Index++) {
+      FreePool (FileInfoBuffer[Index]);
+    }
+    FreePool (FileInfoBuffer);
+  }
+
+  return Status;
 }
 
 /**
-- 
2.16.2.windows.1



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