Re: [Xen-devel] Xen-unstable + linux 5.4.0-rc8: RIP: 0010:xennet_poll+0x35f/0xae0

[Jan Beulich <jbeulich@xxxxxxxx>]

On 25.11.2019 15:21, Sander Eikelenboom wrote:
> L.S.,
> 
> At present one of my PVH VM's kernel crashed with the splat below
> (haven't seen it before, so could be something that happens sporadically).
> 
> Any ideas ?
> 
> --
> Sander
> 
> 
> 
> database databaselogin:  login: [184503.428811] general protection fault: 
> 0000 [#1] SMP NOPTI
> [184503.428887] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 
> 5.4.0-rc8-20191123-doflr-mac80211debug+ #1
> [184503.428932] RIP: 0010:xennet_poll+0x35f/0xae0
> [184503.428955] Code: ba 00 01 00 00 48 8b 8d c0 00 00 00 0f b7 b4 24 92 00 
> 00 00 48 8b 5c 24 78 3d 00 01 00 00 0f 4e d0 89 55 28 8b 95 bc 00 00 00 <89> 
> 74 11 3c 48 8b 8d c0 00 00 00 8b 95 bc 00 00 00 89 44 11 38 89

The insn here being "mov     %esi,(%rcx,%rdx,0x3c)" ...

> [184503.429027] RSP: 0018:ffffc90000003e10 EFLAGS: 00010287
> [184503.429049] RAX: 0000000000000042 RBX: ffffc90000003e88 RCX: 
> fffe88800b865a80

... I notice corruption to bit 48 of RCX here. This can be a result of
memory corruption, but prior instances of such that I had to look into
were bit flips in the CPU instead. Is this a server or desktop class
CPU?

Jan

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxxx
https://lists.xenproject.org/mailman/listinfo/xen-devel