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Re: [Qemu-block] [PATCH] util/async: hold AioContext ref to prevent use-
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From: |
Philippe Mathieu-Daudé |
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Subject: |
Re: [Qemu-block] [PATCH] util/async: hold AioContext ref to prevent use-after-free |
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Date: |
Wed, 24 Jul 2019 12:54:26 +0200 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.7.0 |
On 7/23/19 9:09 PM, Stefan Hajnoczi wrote:
> On Tue, Jul 23, 2019 at 8:06 PM Stefan Hajnoczi <address@hidden> wrote:
>> So if co causes ctx to be freed then we're in trouble. Fix this problem
>> by holding a reference to ctx.
>
> For QEMU 4.2. I'm not aware of a way to trigger this bug in QEMU
> proper. This fix just makes tests/test-bdrv-drain more reliable.
This looks harmless for 4.1-rc3.