[Nouveau] [Bug 58087] [-next] nouveau corrupts kernel mm allocator

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=58087

--- Comment #4 from Peter Hurley <peter at hurleysoftware.com> ---
(In reply to comment #3)
> It's not a problem with vm allocation. The next one (vm->pgt) fails, so we
> free vm, leaving *pvm pointing at freed memory. When we get to
> nouveau_drm_open, we call nouveau_cli_destroy(cli), which tries to free
> cli->base.vm again. Oops.

Thanks for the explanation. That makes sense to me now.

FYI, I did also file a bug in the kernel bugzilla for the memory allocation
failure itself (kernel bug 51301 here
https://bugzilla.kernel.org/show_bug.cgi?id=51301). A 32k allocation on a 10gb
machine shouldn't really ever fail.

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