VirtualBox

Opened 15 years ago

Closed 15 years ago

#5551 closed defect (fixed)

Guru Meditation when stack pointer for trap handler is near zero

Reported by: diamond Owned by:
Component: VMM/RAW Version: VirtualBox 3.0.12
Keywords: Cc:
Guest type: other Host type: other

Description

If the guest causes a trap, ESP is near zero, e.g. ESP=10h (this is just enough for eflags+cs+eip+errorcode without ring transition), hardware virtualization is disabled, VirtualBox goes to Guru Meditation state.

The small example is attached; it is valid bootsector, so can be installed as floppy image. This example raises #PF with ESP=10h from ring-0, in real environment the handler of #PF gots control, skips faulting instruction, and then the code enters idle state. VirtualBox goes to 'Guru Meditation' VERR_TRPM_DONT_PANIC. VBox.log is attached, VBox.png shows black screen.

According to stack trace, TRPMForwardTrap calls PGMVerifyAccess for range [esp-28h,esp), integer overflow results in negative 64-bit address, and pgmRCGst32BitGetPage does not expect this.

Attachments (2)

VBox.log (146.9 KB ) - added by diamond 15 years ago.
1.bin (512 bytes ) - added by diamond 15 years ago.
bootsector, which causes guru meditation

Download all attachments as: .zip

Change History (3)

by diamond, 15 years ago

Attachment: VBox.log added

by diamond, 15 years ago

Attachment: 1.bin added

bootsector, which causes guru meditation

comment:1 by Sander van Leeuwen, 15 years ago

Resolution: fixed
Status: newclosed

Thanks for the report. I've added some extra boundary checks for 32 bits paging modes.

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