Re: [Xen-devel] [PATCH 01/14] x86/soft-reset: Drop gfn reference after calling get_gfn_query()

2018-11-22 Thread Jan Beulich
>>> On 21.11.18 at 14:21, wrote: > get_gfn_query() internally takes the p2m lock, and this error path leaves it > locked. > > This wasn't included in XSA-277 because the error path can only be triggered > by a carefully timed phymap operation concurrent with the domain being paused > and the

[Xen-devel] [PATCH 01/14] x86/soft-reset: Drop gfn reference after calling get_gfn_query()

2018-11-21 Thread Andrew Cooper
get_gfn_query() internally takes the p2m lock, and this error path leaves it locked. This wasn't included in XSA-277 because the error path can only be triggered by a carefully timed phymap operation concurrent with the domain being paused and the toolstack issuing DOMCTL_soft_reset.