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Re: [Qemu-devel] [PATCH] migration: check length directly to make sure t
From: |
Wei Yang |
Subject: |
Re: [Qemu-devel] [PATCH] migration: check length directly to make sure the range is aligned |
Date: |
Tue, 29 Oct 2019 16:21:12 +0800 |
User-agent: |
Mutt/1.9.4 (2018-02-28) |
On Tue, Oct 29, 2019 at 07:04:19AM +0000, Dr. David Alan Gilbert wrote:
>* Wei Yang (address@hidden) wrote:
>> On Fri, Jul 19, 2019 at 07:06:51PM +0100, Dr. David Alan Gilbert wrote:
>> >* Paolo Bonzini (address@hidden) wrote:
>> >> On 19/07/19 19:54, Dr. David Alan Gilbert wrote:
>> >> >> - if ((uintptr_t)host_endaddr & (rb->page_size - 1)) {
>> >> >> - error_report("ram_block_discard_range: Unaligned end
>> >> >> address: %p",
>> >> >> - host_endaddr);
>> >> >> + if (length & (rb->page_size - 1)) {
>> >> >> + error_report("ram_block_discard_range: Unaligned length:
>> >> >> %lx",
>> >> >> + length);
>> >> > Yes, I *think* this is safe, we'll need to watch out for any warnings;
>> >>
>> >> Do you mean compiler or QEMU warning?
>> >
>> >No, I mean lots of these error reports being printed out in some common
>> >case.
>> >
>>
>> Hi, Dave
>>
>> Haven't see you for a period of time :-)
>
>I'm here (although been busy with virtiofs) - but this patch is exec.c
>so I think it needs to be picked by Paolo or rth.
>
Thanks Dave
Paolo
Do you feel comfortable with this?
>Dave
>
>> >Dave
>> >
>> > The patch is safe since there's an
>> >>
>> >> if ((uintptr_t)host_startaddr & (rb->page_size - 1)) {
>> >> error_report("ram_block_discard_range: Unaligned start address:
>> >> %p",
>> >> host_startaddr);
>> >> goto err;
>> >> }
>> >>
>> >> just before this context.
>> >>
>> >> Paolo
>> >--
>> >Dr. David Alan Gilbert / address@hidden / Manchester, UK
>>
>> --
>> Wei Yang
>> Help you, Help me
>--
>Dr. David Alan Gilbert / address@hidden / Manchester, UK
--
Wei Yang
Help you, Help me