Messages in this thread | | | Subject | Re: [PATCH net 0/4] Fix various issue of vhost | From | Jason Wang <> | Date | Tue, 11 Dec 2018 11:01:27 +0800 |
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On 2018/12/11 上午3:47, David Miller wrote: > From: Jason Wang <jasowang@redhat.com> > Date: Mon, 10 Dec 2018 17:44:50 +0800 > >> This series tries to fix various issues of vhost: >> >> - Patch 1 adds a missing write barrier between used idx updating and >> logging. >> - Patch 2-3 brings back the protection of device IOTLB through vq >> mutex, this fixes possible use after free in device IOTLB entries. >> - Patch 4 fixes the diry page logging when device IOTLB is >> enabled. We should done through GPA instead of GIOVA, this was done >> through logging through iovec and traversing GPA->HPA list for the >> GPA. >> >> Please consider them for -stable. > Looks like the kbuild robot found some problems. > > ->used is a pointer (which might be 32-bit) and you're casting it to > a u64 in the translate_desc() calls of patch #4. > > Please make sure that you don't actually require the full domain of > a u64 in these values, as obviously if vq->used is a pointer you will > only get a 32-bit domain on 32-bit architectures.
It seems the reason is that I cast from plain void pointer directly. Let me cast it to uintptr_t first.
Thanks
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