TC9.50b3: pasting a file from a privileged directory into the address bar may crash Total Commander

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yyang
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TC9.50b3: pasting a file from a privileged directory into the address bar may crash Total Commander

Post by *yyang »

Total Commander's address bar is kind enough to convert a pasted file to its path, but when the file is from a privileged directory, this may cause a crash. This issue also affects previous versions.

To reproduce:

1. Launch Everything, and use Ctrl+C to copy a file from a privileged directory into clipboard. These files work on my laptop:
C:\Windows\SysWOW64\config\systemprofile\AppData\Local\CrashDumps\logonset.exe.6444.dmp
C:\Windows\ServiceProfiles\LocalService\AppData\Local\CrashDumps\printfilterpipelinesvc.exe.20156.dmp
2. Highlight Total Commander's address bar and press Ctrl+V. The address bar will become empty, followed by a silent crash in about 2 seconds.

Note:

1. Ctrl+Shift+C in Everything copies a file's full path, and pasting this path into Total Commander's address bar brings up the familiar "Access denied..." dialog box.
2. Not every file from a privileged directory causes a crash.

I would call this laziness rather than a bug, but it's sad to see Total Commander accidentally pass away.
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Re: TC9.50b3: pasting a file from a privileged directory into the address bar may crash Total Commander

Post by *ghisler(Author) »

So far I couldn't reproduce it, I just get a beep.
- Do these files need to exist?
- Do you need to go to the forbidden dir with admin rights first?
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Re: TC9.50b3: pasting a file from a privileged directory into the address bar may crash Total Commander

Post by *yyang »

Thanks for your response, ghisler!

These files need to exist, otherwise they cannot be copied from Everything. On a clean desktop I tried with a new empty file
C:\Windows\ServiceProfiles\LocalService\AppData\Roaming\aaaa.txt
and triggered the same crash. (Not sure if it's caused by a plugin, because Total Commander uses the same configuration on both machines.)

Admin right is not acquired before pasting. I tried again with admin acquired. This time no crash happened, but the pasted path was always "C:\Users\yyang\Desktop" ("yyang" is my user name).
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Re: TC9.50b3: pasting a file from a privileged directory into the address bar may crash Total Commander

Post by *ghisler(Author) »

Sorry, no crash here. There is no folder Crashdumps here in the given location, so I did the following:
1. Go to c:\Windows\ServiceProfiles\LocalService\AppData\Roaming\ (with admin rights)
2. Copy file aaaaa.txt to that directory
3. Returned to c:\Windows
4. Closed and reopened TC to end root rights
5. Started Everything
6. Searched for aaaaa.txt
7. Right clicked on aaaaa.txt in c:\Windows\ServiceProfiles\LocalService\AppData\Roaming\
8. Chose "Copy with path"
9. Clicked on address bar in TC
10. Pressed Ctrl+V
11. Pressed ENTER
-> I got error "Access denied" with buttons "OK" and "As Administrator"
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Re: TC9.50b3: pasting a file from a privileged directory into the address bar may crash Total Commander

Post by *yyang »

In step 7 and 8, please don't choose "Copy with path". Just use Ctrl+C to copy the file itself, and Ctrl+V in the address bar.
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Re: TC9.50b3: pasting a file from a privileged directory into the address bar may crash Total Commander

Post by *ghisler(Author) »

I can indeed reproduce the crash now. Unfortunately it seems to happen completely within the Windows edit control window procedure. It's very strange because I use the same edit control for renaming files, and there it doesn't crash. I will investigate further, but it's possible that I will not be able to fix it.
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Re: TC9.50b3: pasting a file from a privileged directory into the address bar may crash Total Commander

Post by *yyang »

That's quite OK, and please don't spend too much time on it. Maybe I've been spoiled by Total Commander over the years. Thank you sincerely.
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Re: TC9.50b3: pasting a file from a privileged directory into the address bar may crash Total Commander

Post by *ghisler(Author) »

It really crashes inside of Windows: When you copy with Ctrl+C, it does NOT put a file path in the clipboard. Instead it puts an OLE object of the actual file there. Windows tries to access that file, and causes the crash because it fails. I can try to completely disable paste when the clipboard doesn't contain a name, but then you won't be able to paste names when you copied files.
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Re: TC9.50b3: pasting a file from a privileged directory into the address bar may crash Total Commander

Post by *yyang »

Thanks a lot for the investigation! I'm totally content with the current behavior. :)
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Re: TC9.50b3: pasting a file from a privileged directory into the address bar may crash Total Commander

Post by *DrShark »

ghisler(Author) wrote:
2019-11-06, 17:35 UTC
I can try to completely disable paste when the clipboard doesn't contain a name, but then you won't be able to paste names when you copied files.
I think you can fix this crash but make it possible to enable the feature "to paste names when you copied files" by wincmd.ini parameter for users who will use this often and don't care of possible crashes. You already fixed some Windows bugs in TC this way.
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Re: TC9.50b3: pasting a file from a privileged directory into the address bar may crash Total Commander

Post by *DrShark »

yyang wrote:
2019-11-05, 01:09 UTC
In step 7 and 8, please don't choose "Copy with path". Just use Ctrl+C to copy the file itself, and Ctrl+V in the address bar.
Can you reproduce it with 32-bit TC? I'm asking because when trying to make a partial fix, Christian Ghisler found that he can't reproduce it anymore on his Windows 10 machines. The PC with 64-bit Windows 10 to which I has access is still on repair, and on my Vista 32-bit I cannot reproduce the crash (in latest stable Everything, I tried to copy with Ctrl+C some files from C:\Windows\System32\config\systemprofile\AppData\Local\CrashDumps\ and similar protected locations, and on Ctrl+V, Enter in TC's current directory bar I just get a beep, but no crash).

Also, additional questions:
is Everything required to reproduce the crash, or it also happens for you if copy such file with Ctrl+C from search results of elevated TC?
Does it crash on pasting only into not elevated TC, or elevated TC crashes too?
Should some specific location to be opened in TC's panel where we're pasting into current directory bar?
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Re: TC9.50b3: pasting a file from a privileged directory into the address bar may crash Total Commander

Post by *yyang »

Hi, thanks for asking, and very sorry for my late response! Let's see what'll happen to "C:\Windows\ServiceProfiles\LocalService\AppData\Roaming\aaaa.txt" on my machine, a fully patched Windows 10:

1. Locate it in Everything, Ctrl+C.
2. Highlight Total Commander's address bar, Ctrl+V.
3. Crash! (Both 32- and 64-bit version, 9.51 RC3)

1a. Open the protected directory in Windows Explorer, and Ctrl+C on aaaa.txt.
2a. Highlight Total Commander's address bar, Ctrl+V.
3a. Only the full path is pasted in, no crash at all! (Both versions)
4a. Ctrl+V in the file list copies over aaaa.txt just as expected.

Seems that "is Everything required to reproduce the crash" is the key difference.
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Re: TC9.50b3: pasting a file from a privileged directory into the address bar may crash Total Commander

Post by *DrShark »

yyang, thanks for your answers.
Are you launching x86/32-bit or 64-bit Everything app? Is it started elevated (as administrator)?
Will it crash if you'll paste in address bar of elevated 32-bit/64-bit Total Commander?

Can you please try also following:
1. Launch elevated TC.
2. While in C:\Windows\, open Find Files in Separate Process (cm_SearchStandalone) and search for your file aaaa.txt.
3. Open independent elevated and not elevated Total Commander copies, both 32-bit and 64-bit (so you'll have 4 independent TC instances).
4. From Find Files, Feed the found aaaa.txt to listboxes of independent TC instances.
5. In search results panels of independent TC instances, copy aaaa.txt with Ctrl+C, and try to paste in adderss bars of launched Total Commander instances. Does it crash in this case (always/never/only while copy/paste between some of launched TC instances)?

It may also help if you'll share your aaaa.txt file NTFS permissions:
1. Export the rights with iCACLS command: in elevated cmd.exe, execute

Code: Select all

icacls C:\Windows\ServiceProfiles\LocalService\AppData\Roaming\aaaa.txt /save C:\Windows\ServiceProfiles\LocalService\AppData\Roaming\aaaa.txt.acl
Then share the exported .acl file.

2. In some cases the icalcs doesn't restore all the rights from .acl file exported with above method, but it's also possible to pack the aaaa.txt file itself with its permissions:
1) install WinRAR and open its elevated copy (start it as administrator);
2) in opened WinRAR, go to C:\Windows\ServiceProfiles\LocalService\AppData\Roaming\, select aaaa.txt;
3) open Commands->Add files to archive;
4) In "Archive name and parameters" dialog, on Advanced tab check "NTFS Options"->"Save file security" option,
and on Files tab, pick "File path"->"Store full path" or "Store full path including drive letter".
5) pack the file and share it.
Above steps are for WinRAR 3.62 which I have, but it should be same or similar in newer WinRAR versions.
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Re: TC9.50b3: pasting a file from a privileged directory into the address bar may crash Total Commander

Post by *yyang »

@DrShark My Everything is 64-bit and runs as a non-admin auto-start service.

Pasting from Everything to an elevated Total Commander gets the "C:\Users\yyang\Desktop" path. That's weird...

Pasting from an elevated Total Commander's search result to another instance always gets the correct full path w/o crashing, just permission required when I press Enter.

The .rar file can be found here: https://www.dropbox.com/s/qdknqtus0p1u0u4/aaaa.rar?dl=0 (expires in 2 days).
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Re: TC9.50b3: pasting a file from a privileged directory into the address bar may crash Total Commander

Post by *DrShark »

On Vista it seems it doesn't crash because there Explorer doesn't copy the paths with files (Ctrl+C in Everything uses Explorer's method).
On Windows 7 32-bit I reproduced the crash:
1. Start TC with clean ini.
2. Start elevated portable Everything to make it possible to index NTFS drives.
3. In Everything settings, enable all settings for indexing c:\ drive. Indexing should be quick.
4. In Everything's search field, enter:
serviceprofiles\
- this will make it show everything under c:\windows\serviceprofiles
5. Select all found dirs/files in Everything and press Ctrl+C.
6. In TC, activate current directory bar, command line or Shift+F4 input field.
7. Press Ctrl+V: TC will show access violation error like following:
* Current directory bar paste crash:

Code: Select all

---------------------------
Total Commander 9.51 RC3
---------------------------
Access violation at address 761B15A2. Read of address 098819AA.
Access violation at address 761B15A2. Read of address 098819AA
Windows 7 SP1 HomePremium 6.1 (Build 7601), base: 00400000

Please report this error to the Author, with a description
of what you were doing when this error occurred!

Windows exception: C0000005
Stack trace:
761B15A2
0044DCD6  0044CD8A  >0042886E  0044C32C  0042886E  0042E0A9
0042E144  
Raw:
0044C282  0042886E  0044D103  0043875A  0044DCD6  0044AD89
0044D059  0044C3F6  0044CD8A  0042886E  0044C32C  0042886E
0042E0A9  0042E144  0042E2FE  
Press Ctrl+C to copy this report!
Continue execution?
---------------------------
Да   Нет   
---------------------------
* Command line paste crash

Code: Select all

---------------------------
Total Commander 9.51 RC3
---------------------------
Access violation at address 761B15A2. Read of address 099319AA.
Access violation at address 761B15A2. Read of address 099319AA
Windows 7 SP1 HomePremium 6.1 (Build 7601), base: 00400000

Please report this error to the Author, with a description
of what you were doing when this error occurred!

Windows exception: C0000005
Stack trace:
761B15A2
0046B77A  0044C3F6  0044CD8A  >0042886E  0044C32C  0042886E
0042886E  0044C282  0042886E  0046B77A  0044C3F6  0044CD8A
0042886E  0044AD89  0044E24F  004398D6  0046B75C  0042886E
0042E0A9  0042E144  
Raw:
0044C282  0042886E  0044D103  0044AD89  0044D059  00439D67
0046B77A  0044C3F6  0044CD8A  0042886E  0044C32C  0042886E
0042886E  0044C282  0042886E  0044D103  0044AD89  0044D059
00439D67  0046B77A  0044C3F6  0044CD8A  0044CDAD  0042D70C
0042886E  00402E8E  0044AD89  0044D059  0042A869  0044DF35
0044AD89  0044D059  0044DF35  0044AD89  0044D059  00439D67
0046B77A  0044C3F6  0044ACBF  0044E24F  0044D059  0044D8C7
0044D921  0044D8F9  00439AA3  004398D6  004398D6  0046B75C
0046B75C  0042886E  0044D103  0044D4C0  0046BFE6  0044D103
0044D4C0  0046BFE6  0044C32C  0042886E  0044D0E6  0044AD89

Press Ctrl+C to copy this report!
Continue execution?
---------------------------
Да   Нет   
---------------------------
*Shift+F4 inputbox paste crash:

Code: Select all

---------------------------
Total Commander 9.51 RC3
---------------------------
Access violation at address 761B15A2. Read of address 07D519AA.
Access violation at address 761B15A2. Read of address 07D519AA
Windows 7 SP1 HomePremium 6.1 (Build 7601), base: 00400000

Please report this error to the Author, with a description
of what you were doing when this error occurred!

Windows exception: C0000005
Stack trace:
761B15A2
00439BFE  >004398D6  0046B739  0042886E  0042E0A9  0042E144
0059CE45  0059C735  0059D07E  0058EE8A  0044C32C  0042886E
004023EF  004026B8  0044D8C7  00451DDE  0044AD89  0044C3F6
0044CD8A  0042886E  0044C32C  0042886E  0042E0A9  0042E144

Raw:
0044CDAD  00439BFE  004398D6  0046B739  0044C282  0042886E
0044D103  0044D4C0  0046BFE6  0043A4D0  0044D0E6  0044AD89
0044D059  0043BB5A  0044C37E  0044C3F6  0044CD8A  0044CDAD
0042886E  0044C32C  00402E8E  0044AD89  0044D059  0044D0A7
0042A869  0044C3F6  0044CD8A  0044CDAD  0042886E  0044C282
0042886E  0042886E  0042E0A9  0042E144  00451011  0059CE45
00406F94  004023EF  00403414  0046E394  0044C32C  0042886E
0059C735  0059D07E  0058EE8A  0044C282  0042886E  005FD93F
004023EF  005FF915  004023EF  004026B8  005FF915  0046E394
005C0071  004C0044  005C0071  004C0044  005FD93F  004C0044

Press Ctrl+C to copy this report!
Continue execution?
---------------------------
Да   Нет   
---------------------------
yyang, do you get similar error message when crash happens on your system? If yes, please post it too.
Edit: in start post you wrote: "The address bar will become empty, followed by a silent crash in about 2 seconds." - so we got different kind of crashes...
Last edited by DrShark on 2020-03-05, 18:23 UTC, edited 1 time in total.
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