Invalid access to memory - TSecureShell::EventSelectLoop

I had uploaded a file to the server and was trying to scroll through the list to see if it was there. Somehow I accidentally triggered a file transfer of a different file, and I cancelled/aborted the download. I again tried to scroll through the list and again accidentally started a file transfer from server->local, I'm not sure how (I was just using the arrow keys). I immediately started trying to hit the abort button but the PC was unresponsive. The dialog showed with the abort button, but the timer was stuck at 60 seconds. I waited a while, and it eventually started counting down, it went all the way to 52 but then jumped back up to 60 and got stuck again. At that point I clicked it, and got a few more dialog boxes telling me that I could abort. I kept clicking abort and eventually I got the crash report box.


I have "Enable session logging on level:"->Normal, but none of the other session options were checked. I've attached the contents of the log window, it doesn't look helpful but who knows.

BTW I was blocked from posting this because the forum software didn't like the function name "ExplorerActions__Execute" and I had to censor it by putting in the underscores.

WinSCP 5.6.3

Error message:
Invalid access to memory.

Stack trace:
[00AA0D26] TSecureShell::EventSelectLoop
[00BD6B82] C4727_3
[00BD8BEA] ____ExceptionHandler
[00BD5B64] __ExceptionHandler
[7C903275] ntdll.dll.RtlConvertUlongToLargeInteger
[7C90E485] ntdll.dll.KiUserExceptionDispatcher
[00AA0FB9] TSecureShell::Idle
[00B001A7] TTerminal::Idle
[00479BE9] TTerminalManager::Idle
[00415663] TCustomScpExplorerForm::Idle
[0043834B] TNonVisualDataModule::DoIdle
[00437157] TNonVisualDataModule::ExplorerActions__Execute
[00781A84] System::Actions::TContainedActionList::ExecuteAction
[005695E5] Vcl::Actnlist::TCustomAction::Execute

[00AB8DE7] TSessionData::HasSessionName
[7C903275] ntdll.dll.RtlConvertUlongToLargeInteger
[7C90E485] ntdll.dll.KiUserExceptionDispatcher
[00AB8E92] TSessionData::GetSessionName
[0047964E] TTerminalManager::TerminalTitle
[0041B7A0] TCustomScpExplorerForm::Notify
[0041B646] TCustomScpExplorerForm::InactiveTerminalException
[00479C48] TTerminalManager::Idle
[00415663] TCustomScpExplorerForm::Idle
[0043834B] TNonVisualDataModule::DoIdle
[00437157] TNonVisualDataModule::ExplorerActions__Execute
[00781A84] System::Actions::TContainedActionList::ExecuteAction
[005695E5] Vcl::Actnlist::TCustomAction::Execute

Thanks for your report.
I have sent you an email with a debug version of WinSCP to address you have used to register on this forum.

Though only now I've noticed the version of WinSCP you are using. Please upgrade to 5.7. I believe it fixes your problem.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 5.7.4

Error message:
Accesso alla memoria non valido.

Stack trace:
(006A8595) TSecureShell::EventSelectLoop
(007E344A) C4799_3
(007E54B2) ____ExceptionHandler
(007E242C) __ExceptionHandler
(0005A67A) ntdll.dll
(0000F15E) ntdll.dll.KiUserExceptionDispatcher
(006A780B) TSecureShell::WaitForData
(006A4F02) TSecureShell::Receive
(006A5180) TSecureShell::ReceiveLine
(006861E5) TSCPFileSystem::ReadCommandOutput
(0068671C) TSCPFileSystem::ExecCommand
(006867CB) TSCPFileSystem::ExecCommand
(00689F18) TSCPFileSystem::AnyCommand
(0071A210) TTerminal::DoAnyCommand
(00719F57) TTerminal::AnyCommand
(0073B757) TConsoleDialog::DoExecuteCommand
(0073B863) TConsoleDialog::ExecuteCommand
(0073B56F) TConsoleDialog::ExecuteButtonClick
(0021C069) Vcl::Controls::TWinControl::WndProc

(00689F59) TSCPFileSystem::AnyCommand
(007E344A) C4799_3
(007E54B2) ____ExceptionHandler
(007E242C) __ExceptionHandler
(0005A67A) ntdll.dll
(0000F15E) ntdll.dll.KiUserExceptionDispatcher
(0071A210) TTerminal::DoAnyCommand
(00719F57) TTerminal::AnyCommand
(0073B757) TConsoleDialog::DoExe

Thanks for your report.
I have sent you an email with a debug version of WinSCP to address you have used to register on this forum.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 5.7.6

Error message:
Error changing directory to '..'.

Error getting name of current remote directory.
Invalid access to memory.

Stack trace:
(006A964A) TSecureShell::EventSelectLoop
(007E46BA) C4799_3
(007E6722) ____ExceptionHandler
(007E369C) __ExceptionHandler
(000623AA) ntdll.dll
(0000F12E) ntdll.dll.KiUserExceptionDispatcher
(006A87E7) TSecureShell::WaitForData
(006A5EDE) TSecureShell::Receive
(006A615C) TSecureShell::ReceiveLine
(00686FE5) TSCPFileSystem::ReadCommandOutput
(0068751C) TSCPFileSystem::ExecCommand
(006875CB) TSCPFileSystem::ExecCommand
(00688627) TSCPFileSystem::ReadCurrentDirectory
(007134B9) TTerminal::ReadCurrentDirectory
(0070F6B6) TTerminal::ReactOnCommand
(006154B7) TUnixDirView::ChangeDirectory
(00613966) TUnixDirView::ExecuteParentDirectory

I know how to reproduce the problem or the problem happens frequently enough. I wish to be contacted by the WinSCP team to help resolving the problem.

Thanks for your report.
I have sent you an email with a debug version of WinSCP to the address you have used to register on this forum.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 5.7.5

Error message:
Error getting name of current remote directory.

Invalid access to memory.

Stack trace:
(006A8A56) TSecureShell::EventSelectLoop
(007E39EA) C4799_0
(007E5A52) ____ExceptionHandler
(007E29CC) __ExceptionHandler
(0005A5DA) ntdll.dll
(0000F12E) ntdll.dll.KiUserExceptionDispatcher
(006A7BF3) TSecureShell::WaitForData
(006A52EA) TSecureShell::Receive
(006A5568) TSecureShell::ReceiveLine
(00686535) TSCPFileSystem::ReadCommandOutput
(00686A6C) TSCPFileSystem::ExecCommand
(00686B1B) TSCPFileSystem::ExecCommand
(00687B77) TSCPFileSystem::ReadCurrentDirectory
(007128CD) TTerminal::ReadCurrentDirectory
(0071227A) TTerminal::ReloadDirectory
(00613500) TUnixDirView::ReloadDirectory
(00014D74) TCustomScpExplorerForm::Idle
(000379D7) TNonVisualDataModule::DoIdle
(000367E1) TNonVisualDataModule::ExplorerActionsExecute
(003822E4) System::Actions::TContainedActionList::ExecuteAction
(00169E45) Vcl::Actnlist::TCustomAction::Execute
(0034021C) System::Classes::_18201
(000152F7) USER32.dll
(00015D35) USER32.dll
(000167BF) USER32.dll
(00016885) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 5.7.7

Error message:
Error changing directory to '/etc/prelink.conf.d'.

Invalid access to memory.

Stack trace:
(006AA19A) TSecureShell::EventSelectLoop
(007E08AA) C4799_0
(007E2912) ____ExceptionHandler
(007DF88C) __ExceptionHandler
(0008A61F) ntdll.dll
(00077E7A) ntdll.dll.KiUserExceptionDispatcher
(006A9337) TSecureShell::WaitForData
(006A6A2E) TSecureShell::Receive
(006D903F) TSFTPFileSystem::ReceivePacket
(006DA73C) TSFTPFileSystem::ReceiveResponse
(006DA939) TSFTPFileSystem::SendPacketAndReceiveResponse
(006DAF5E) TSFTPFileSystem::RealPath
(006DB696) TSFTPFileSystem::RealPath
(006E99A1) TSFTPFileSystem::ChangeDirectory
(0071B4EE) TTerminal::ChangeDirectory
(00619316) TCustomUnixDriveView::Change
(002532F2) Vcl::Comctrls::TCustomTreeView::CNNotify
(003DE479) Customdriveview::TCustomDriveView::CNNotify
(0021C609) Vcl::Controls::TWinControl::WndProc
(002535AE) Vcl::Comctrls::TCustomTreeView::WndProc
(0021C76F) Vcl::Controls::_17076
(0021C609) Vcl::Controls::TWinControl::WndProc
(0021BC50) Vcl::Controls::TWinControl::MainWndProc
(0034059C) System::Classes::_18201
(000374F1) USER32.dll
(00015C3B) USER32.dll
(0001581B) USER32.dll
(0001C167) USER32.dll
(00077E54) ntdll.dll.KiUserCallbackDispatcher
(00014EDE) USER32.dll.SendMessageW
(0007DBD8) COMCTL32.DLL
(00034F23) COMCTL32.DLL
(00034D8A) COMCTL32.DLL
(0010873F) COMCTL32.DLL
(000CF107) COMCTL32.DLL
(000374F1) USER32.dll
(00015C3B) USER32.dll
(000159D2) USER32.d

The problem happens rarely. I cannot reproduce it.

Your bug reporting needs at least 1 more "Report options" for issues that sometimes happen or "Not Sure".



<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 5.7.7

Error message:
Error changing directory to '/var/lib/insserv'.

Invalid access to memory.

Stack trace:
(006AA19A) TSecureShell::EventSelectLoop
(007E08AA) C4799_0
(007E2912) ____ExceptionHandler
(007DF88C) __ExceptionHandler
(00045CC6) ntdll.dll.RtlRaiseStatus
(00045B52) ntdll.dll.KiUserExceptionDispatcher
(006A9337) TSecureShell::WaitForData
(006A6A2E) TSecureShell::Receive
(006D903F) TSFTPFileSystem::ReceivePacket
(006DA73C) TSFTPFileSystem::ReceiveResponse
(006DA939) TSFTPFileSystem::SendPacketAndReceiveResponse
(006DAF5E) TSFTPFileSystem::RealPath
(006DB696) TSFTPFileSystem::RealPath
(006E99A1) TSFTPFileSystem::ChangeDirectory
(0071B4EE) TTerminal::ChangeDirectory
(00619316) TCustomUnixDriveView::Change
(002532F2) Vcl::Comctrls::TCustomTreeView::CNNotify
(003DE479) Customdriveview::TCustomDriveView::CNNotify
(0021C609) Vcl::Controls::TWinControl::WndProc
(002535AE) Vcl::Comctrls::TCustomTreeView::WndProc
(0021C76F) Vcl::Controls::_17076
(0021C609) Vcl::Controls::TWinControl::WndProc
(0021BC50) Vcl::Controls::TWinControl::MainWndProc
(0034059C) System::Classes::_18201
(0001B4F4) USER32.dll
(0001B5F2) USER32.dll
(00013F16) USER32.dll
(00013F8A) USER32.dll
(00045B2B) ntdll.dll.KiUserCallbackDispatcher
(0001458D) USER32.dll.SendMessageW
(0002B06D) COMCTL32.DLL
(000A846F) COMCTL32.DLL
(000A77FB) COMCTL32.DLL
(000F320C) COMCTL32.DLL
(0001AE85) COMCTL32.DLL
(0001B4F4) USER32.dll
(0001B5F2) USER32.dll
(00010B34

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 5.7.7

Error message:
Error creating folder 'bin'.

Invalid access to memory.

Stack trace:
(006AA19A) TSecureShell::EventSelectLoop
(007E08AA) C4799_0
(007E2912) ____ExceptionHandler
(007DF88C) __ExceptionHandler
(00062496) ntdll.dll
(0000F13E) ntdll.dll.KiUserExceptionDispatcher
(006A9337) TSecureShell::WaitForData
(006A6A2E) TSecureShell::Receive
(006D903F) TSFTPFileSystem::ReceivePacket
(006DA73C) TSFTPFileSystem::ReceiveResponse
(006DA939) TSFTPFileSystem::SendPacketAndReceiveResponse
(006EEF32) TSFTPFileSystem::CreateDirectoryW
(0071AA7D) TTerminal::DoCreateDirectory
(0071A8EE) TTerminal::CreateDirectoryW
(006162C7) TUnixDirView::CreateDirectoryExW
(00012EBB) TCustomScpExplorerForm::CreateDirectoryW
(0003234C) TNonVisualDataModule::ExplorerActionsExecute
(00382614) System::Actions::TContainedActionList::ExecuteAction
(0016A155) Vcl::Actnlist::TCustomAction::Execute
(0034059C) System::Classes::_18201
(000152F7) USER32.dll
(00015D35) USER32.dll
(000167CE) USER32.dll
(00016895) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 5.9.2

Error message:
Fehler beim Wechseln in Verzeichnis '/var/www/downloads/Einheiten/AnalysisIndividuell/html/02/01'.

Zugriffsverletzung - ungültiger Zugriff auf den Speicher.

Stack trace:
(006FCCF5) TSecureShell::EventSelectLoop
(00863846) C5073_3
(008658AE) ____ExceptionHandler
(00862668) __ExceptionHandler
(0008137F) ntdll.dll
(0006EF1A) ntdll.dll.KiUserExceptionDispatcher
(006FA45B) TSecureShell::Send
(007364E1) TSFTPFileSystem::SendPacket
(0073A49D) TSFTPFileSystem::SendPacketAndReceiveResponse
(0073AAD6) TSFTPFileSystem::RealPath
(0073B20E) TSFTPFileSystem::RealPath
(00749469) TSFTPFileSystem::ChangeDirectory
(0077BA02) TTerminal::ChangeDirectory
(00658A3A) TCustomUnixDriveView::Change
(00285912) Vcl::Comctrls::TCustomTreeView::CNNotify
(0040C3A5) Customdriveview::TCustomDriveView::CNNotify
(0024EC29) Vcl::Controls::TWinControl::WndProc
(00285BCE) Vcl::Comctrls::TCustomTreeView::WndProc
(0024ED8F) Vcl::Controls::_17076
(0024EC29) Vcl::Controls::TWinControl::WndProc
(0024E270) Vcl::Controls::TWinControl::MainWndProc
(00372BEC) System::Classes::_18201
(0002C271) USER32.dll
(0000D845) USER32.dll
(0000D47B) USER32.dll
(00017AD7) USER32.dll
(0006EEF4) ntdll.dll.KiUserCallbackDispatcher
(0000FBCB) USER32.dll.SendMessageW
(000638A8) COMCTL32.DLL
(0002279B) COMCTL32.DLL
(00022606) COMCTL32.DLL
(0001C69E) COMCTL32.DLL
(000212AE) COMCTL32.DLL
(0002C271) USER32.dll
(0000D845) USER32.dll
(0000CED2) USER32.dll.CallWind

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

Had two session tabs open, closed the second one.

WinSCP 5.9.2

Error message:
Error getting name of current remote directory.

Invalid access to memory.

Stack trace:
(006FCCF5) TSecureShell::EventSelectLoop
(00863846) C5073_3
(008658AE) ____ExceptionHandler
(00862668) __ExceptionHandler
(0008A61F) ntdll.dll
(00077E7A) ntdll.dll.KiUserExceptionDispatcher
(006FBE6B) TSecureShell::WaitForData
(006F9556) TSecureShell::Receive
(006F97D4) TSecureShell::ReceiveLine
(006D9451) TSCPFileSystem::ReadCommandOutput
(006D9988) TSCPFileSystem::ExecCommand
(006D9A37) TSCPFileSystem::ExecCommand
(006DAA93) TSCPFileSystem::ReadCurrentDirectory
(00774A89) TTerminal::ReadCurrentDirectory
(00774436) TTerminal::ReloadDirectory
(00653C98) TUnixDirView::ReloadDirectory
(00016BDC) TCustomScpExplorerForm::Idle
(0003CE17) TNonVisualDataModule::DoIdle
(0003CDD4) TNonVisualDataModule::SessionIdleTimerTimer
(00372BEC) System::Classes::_18201
(000374F1) USER32.dll
(00015C3B) USER32.dll
(0001553C) USER32.dll
(000152FB) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 5.9.3

Error message:
Zugriffsverletzung - ungültiger Zugriff auf den Speicher.

Stack trace:
(00866422) C5073_3
(0086848A) ____ExceptionHandler
(00865244) __ExceptionHandler
(000624F6) ntdll.dll
(0000F13E) ntdll.dll.KiUserExceptionDispatcher
(00001DBC) WS2_32.DLL
(000025E4) WS2_32.DLL
(0000282B) WS2_32.DLL.WSASetLastError
(00001E72) WS2_32.DLL
(00001E9C) WS2_32.DLL
(006FF04A) TSecureShell::EventSelectLoop
(006FDF2B) TSecureShell::WaitForData
(006F9335) TSecureShell::Init
(006F8C0A) TSecureShell::Open
(00736A9B) TSFTPFileSystem::Open
(00771963) TTerminal::Reopen
(006C89FD) TTerminalThread::TerminalReopenEvent
(006C39C4) TSignalThread::Execute
(00098AD3) Userinterface::C20_0
(00012368) kernel32.dll.BaseThreadInitThunk
(00038900) ntdll.dll
(000388D0) ntdll.dll

(00866A8D) C5073_3
(00868067) _ReThrowException
(006F9443) TSecureShell::Init
(006F8C0A) TSecureShell::Open
(00736A9B) TSFTPFileSystem::Open
(00771963) TTerminal::Reopen
(006C89FD) TTerminalThread::TerminalReopenEvent
(006C39C4) TSignalThread::Execute
(00098AD3) Userinterface::C20_0
(00012368) kernel32.dll.BaseThreadInitThunk
(00038900) ntdll.dll
(000388D0) ntdll.dll

(00866A8D) C5073_3
(00868067) _ReThrowException
(006F94DE) TSecureShell::Init
(006F8C0A) TSecureShell::Open
(00736A9B) TSFTPFileSystem::Open
(00771963) TTerminal::Reopen
(006C89FD) TTerminalThread::TerminalReopenEvent
(006C39C4) TSignalThread::Execute
(00098AD3) Userinterface::C2

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 5.9.2

Error message:
Error changing directory to '/etc/setuptool.d'.

Invalid access to memory.

Stack trace:
(006FCCF5) TSecureShell::EventSelectLoop
(00863846) C5073_3
(008658AE) ____ExceptionHandler
(00862668) __ExceptionHandler
(00081D3F) ntdll.dll
(0006F8EA) ntdll.dll.KiUserExceptionDispatcher
(006FA45B) TSecureShell::Send
(007364E1) TSFTPFileSystem::SendPacket
(0073A49D) TSFTPFileSystem::SendPacketAndReceiveResponse
(0073AAD6) TSFTPFileSystem::RealPath
(0073B20E) TSFTPFileSystem::RealPath
(00749469) TSFTPFileSystem::ChangeDirectory
(0077BA02) TTerminal::ChangeDirectory
(00658A3A) TCustomUnixDriveView::Change
(00285912) Vcl::Comctrls::TCustomTreeView::CNNotify
(0040C3A5) Customdriveview::TCustomDriveView::CNNotify
(0024EC29) Vcl::Controls::TWinControl::WndProc
(00285BCE) Vcl::Comctrls::TCustomTreeView::WndProc
(0024ED8F) Vcl::Controls::_17076
(0024EC29) Vcl::Controls::TWinControl::WndProc
(0024E270) Vcl::Controls::TWinControl::MainWndProc
(00372BEC) System::Classes::_18201
(0002C2B1) USER32.dll
(0000D885) USER32.dll
(0000D4BB) USER32.dll
(00017B07) USER32.dll
(0006F8C4) ntdll.dll.KiUserCallbackDispatcher
(0000FBFB) USER32.dll.SendMessageW
(000638A8) COMCTL32.DLL
(0002279B) COMCTL32.DLL
(00022606) COMCTL32.DLL
(000DDC48) COMCTL32.DLL
(0008B626) COMCTL32.DLL
(0002C2B1) USER32.dll
(0000D885) USER32.dll
(0000CF12) USER32.dll.CallWindowProcW
(0024ED3A) Vcl::Controls::TWinControl::DefaultHandler
(0024EC29) V

The problem happens rarely. I cannot reproduce it.