fatal error since 5.26: instruction 0x3f526d32 uses memory that can not be read

[gggeek]

Host: win 8.1 64 bit; guest: Debian 8

The VM in question used to work until yesterday, with VBox up to 5.24.

Today I updated to 5.26 and at VM boot I get the error as per the attached image. On the same host, another Debian 8 VM works fine.

[atrn]

Although I don't have screen shots I hit this with a Centos 6.9 guest (hosted on Win7). The VM worked with 5.1.24. Upgraded to 5.1.26 and the VM fails during guest boot/startup (address offset 0x18 is the same, I'm assuming its some NULL deference). I downgraded to 5.1.24 and haven't had time to repeat the test but can do so if more data is desired.

[Frank Mehnert]

I would like to have an application dump for the crashed VM. If you can provide one (could you upload it to a server?), please contact me via private email at frank _dot_ mehnert _at_ oracle _dot_ com.

[gggeek]

PS: tried to start the same vm today, and it started without a hitch...

[pentagonik]

Please give the just uploaded 5.1 test build 117314 a try, which can be found here: https://www.virtualbox.org/wiki/Testbuilds

[atrn]

I'm unable to provide memory dumps (sensitive work). Some further details:

• 32-bit Centos 6.9 guest
• 64-bit Win7 host

VM works fine in 5.1.24. In 5.1.26 the VM fails at startup. Disabling audio (ICH AC97 via DirectSound) makes the VM startup. With 5.1.27 test build 117314 the VM starts with audio enabled.

[Frank Mehnert]

Thank you. So 5.1.27 test builds > 117314 should definitely fix these problems and everybody experiencing these crashes with 5.1.26 please let us know if these test builds do NOT fix your crashes!

[lfaatsnat]

Having the same problem with 5.1.26 on a Windows 7 host and Windows XP guest with a different memory location, but otherwise the same message. Works fine with 5.1.24 and earlier. Changing the host audio driver to the null driver, but otherwise leaving sound enabled boots the VM (with no sound). The test build 5.1.27 117332 boots with the host audio driver set to Windows DirectSound, but sound doesn't work properly, the audio is choppy, or sometimes buzzes after a sound until the next sound input, then stops. Otherwise the VM works correctly.

[pentagonik]

@lfaatsnat Can you please provide a VBox.log of the XP guest running?

[lfaatsnat]

VBox.log sound problem on test build

[pentagonik]

Does the problem still persist in the latest 5.1.28 version?

[pentagonik]

Should be fixed with 5.1.28. Please re-open if necessary.