Best way to debug an invalid opcode

Rik van Riel riel at
Thu Mar 19 14:33:29 EDT 2020

On Thu, 2020-03-19 at 10:22 +0100, Karaoui mohamed lamine wrote:
> Hi list,
> I am currently encountering a kernel oops that indicate an "invalid
> opcode: 0000 [#1] SMP"
> I am working on this project
> The full log of the bug can be found here: 
> (at the end)
> Here is a snippet of the log:
> [  107.980285] ------------[ cut here ]------------
> [  107.980995] kernel BUG at arch/x86/kvm/dsm-util.c:214!

Why don't you look at the code?

This bug is in the DSM code itself. You'll have to figure
out why xbzrle_decode_buffer is returning a negative value.

All Rights Reversed.
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