Re: [Qemu-devel] [PATCH 0/3] More netlink fixes

[Laurent Vivier <laurent@vivier.eu>]

Le 21/06/2016 à 19:55, Peter Maydell a écrit :
> On 21 June 2016 at 18:51, Laurent Vivier <laurent@vivier.eu> wrote:
>> This series allows to run "apt-get update" or "dnf update"
>>
>> Access to internet is hanging because glibc checks the netlink
>> sequence number when it scans for the local IP addresses,
>> and this number is corrupted. This is fixed by patch 2.
>>
>> Once we have fixed this, passwd is not working anymore (audit netlink),
>> because data are not translated while using recvfrom(). This is fixed by
>> patch 3. Patch 1 is a pre-requesite for patch 3.
>>
>> I've tested "apt-get update" and "passwd" with qemu-s390x (big-endian/64bit)
>> ,qemu-m68k (big-endian/32bit, qemu-ppc64le (little-endian/64bit) on x86_64
>> (little-endian/64bit).
> 
> Are these fixes for regressions? "apt-get update" has worked
> for me for ages.

Yes.

When netlink is not available, glibc doesn't use it and "apt-get
update", "wget", "dnf update", ... work fine.

But when netlink is available, glibc uses it and we meet this bug: they
hang.

But it happens only if endianness differs between host and guest.

Laurent