REF: https://bugzilla.tianocore.org/show_bug.cgi?id=2049
ShellPkg\Library\UefiShellLevel2CommandsLib\Cp.c line 104 and
ShellPkg\Library\UefiShellLevel2CommandsLib\Mv.c line 640, the
pointer variable Response may be a NULL pointer. So we should
make sure that it isn't NULL before dereference it.
If Response is NULL that indicates a EFI_OUT_OF_RESOURCES
error, directly return SHELL_ABORTED.
Cc: Jaben Carsey <jaben.car...@intel.com>
Cc: Ray Ni <ray...@intel.com>
Signed-off-by: Zhichao Gao <zhichao....@intel.com>
---
.../Library/UefiShellLevel2CommandsLib/Cp.c | 42 ++++++++-------
.../Library/UefiShellLevel2CommandsLib/Mv.c | 52 ++++++++++---------
2 files changed, 51 insertions(+), 43 deletions(-)
diff --git a/ShellPkg/Library/UefiShellLevel2CommandsLib/Cp.c
b/ShellPkg/Library/UefiShellLevel2CommandsLib/Cp.c
index 18b05b5803..632d50229a 100644
--- a/ShellPkg/Library/UefiShellLevel2CommandsLib/Cp.c
+++ b/ShellPkg/Library/UefiShellLevel2CommandsLib/Cp.c
@@ -2,7 +2,7 @@
Main file for cp shell level 2 function.
(C) Copyright 2015 Hewlett-Packard Development Company, L.P.<BR>
- Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>
+ Copyright (c) 2009 - 2019, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
@@ -101,24 +101,28 @@ CopySingleFile(
// possibly return based on response
//
if (!SilentMode) {
- switch (*(SHELL_PROMPT_RESPONSE*)Response) {
- case ShellPromptResponseNo:
- //
- // return success here so we dont stop the process
- //
- return (SHELL_SUCCESS);
- case ShellPromptResponseCancel:
- *Resp = Response;
- //
- // indicate to stop everything
- //
- return (SHELL_ABORTED);
- case ShellPromptResponseAll:
- *Resp = Response;
- case ShellPromptResponseYes:
- break;
- default:
- return SHELL_ABORTED;
+ if (Response != NULL) {
+ switch (*(SHELL_PROMPT_RESPONSE*)Response) {
+ case ShellPromptResponseNo:
+ //
+ // return success here so we dont stop the process
+ //
+ return (SHELL_SUCCESS);
+ case ShellPromptResponseCancel:
+ *Resp = Response;
+ //
+ // indicate to stop everything
+ //
+ return (SHELL_ABORTED);
+ case ShellPromptResponseAll:
+ *Resp = Response;
+ case ShellPromptResponseYes:
+ break;
+ default:
+ return SHELL_ABORTED;
+ }
+ } else {
+ return SHELL_ABORTED;
}
}
}
diff --git a/ShellPkg/Library/UefiShellLevel2CommandsLib/Mv.c
b/ShellPkg/Library/UefiShellLevel2CommandsLib/Mv.c
index 8c2852d7eb..2cfa588a8c 100644
--- a/ShellPkg/Library/UefiShellLevel2CommandsLib/Mv.c
+++ b/ShellPkg/Library/UefiShellLevel2CommandsLib/Mv.c
@@ -2,7 +2,7 @@
Main file for mv shell level 2 function.
(C) Copyright 2013-2015 Hewlett-Packard Development Company, L.P.<BR>
- Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>
+ Copyright (c) 2009 - 2019, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
@@ -637,29 +637,33 @@ ValidateAndMoveFiles(
if (Response == NULL) {
ShellPromptForResponseHii(ShellPromptResponseTypeYesNoAllCancel,
STRING_TOKEN (STR_GEN_DEST_EXIST_OVR), gShellLevel2HiiHandle, &Response);
}
- switch (*(SHELL_PROMPT_RESPONSE*)Response) {
- case ShellPromptResponseNo:
- FreePool(Response);
- Response = NULL;
- continue;
- case ShellPromptResponseCancel:
- *Resp = Response;
- //
- // indicate to stop everything
- //
- SHELL_FREE_NON_NULL(FullCwd);
- return (SHELL_ABORTED);
- case ShellPromptResponseAll:
- *Resp = Response;
- break;
- case ShellPromptResponseYes:
- FreePool(Response);
- Response = NULL;
- break;
- default:
- FreePool(Response);
- SHELL_FREE_NON_NULL(FullCwd);
- return SHELL_ABORTED;
+ if (Response != NULL) {
+ switch (*(SHELL_PROMPT_RESPONSE*)Response) {
+ case ShellPromptResponseNo:
+ FreePool(Response);
+ Response = NULL;
+ continue;
+ case ShellPromptResponseCancel:
+ *Resp = Response;
+ //
+ // indicate to stop everything
+ //
+ SHELL_FREE_NON_NULL(FullCwd);
+ return (SHELL_ABORTED);
+ case ShellPromptResponseAll:
+ *Resp = Response;
+ break;
+ case ShellPromptResponseYes:
+ FreePool(Response);
+ Response = NULL;
+ break;
+ default:
+ FreePool(Response);
+ SHELL_FREE_NON_NULL(FullCwd);
+ return SHELL_ABORTED;
+ }
+ } else {
+ return SHELL_ABORTED;
}
Status = ShellDeleteFileByName(FullDestPath!=NULL?
FullDestPath:DestPath);
}
--
2.21.0.windows.1
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