Re: PCI arbiter crash on last qemu image

[Damien Zammit]

Hi there,

On 17/8/20 1:04 am, Joan Lledó wrote:
> I found the same issue, investigating a bit more I found that in
> func_files.c:201[1], the value of region->memory is 0x0, so reading from
> there raises a segfault. That pointer should be filled in libpciacces,
> at x86_pci.c:601[2] during the startup, but for some reason it seems it
> doesn't. Regrettably I don't have the time to go further right know.
> 
> Could it be some issue with /dev/mem?

It's probably due to this patch:

https://gitlab.freedesktop.org/xorg/lib/libpciaccess/-/merge_requests/12/diffs?commit_id=952f4553f91da3f3eb8615a8d53a6da7f7bc0080

(We are not using master of pciaccess).

I removed the mapping and set it to NULL because there was a bug that caused
the initial mapping within "probe" to prevent further mappings of the same 
region later on.

Perhaps a better way to fix the mapping problem I encountered
is by removing the check for previous mappings when trying to map regions,
but no one commented on my PR upstream (yet).

Damien