From: Stefan Hajnoczi <stefanha@redhat.com>
To: Alexander Bulekov <alxndr@bu.edu>
Cc: qemu-devel@nongnu.org, Thomas Huth <thuth@redhat.com>,
Darren Kenny <darren.kenny@oracle.com>,
Fam Zheng <fam@euphon.net>,
"open list:Block I/O path" <qemu-block@nongnu.org>
Subject: Re: [PATCH] async: avoid use-after-free on re-entrancy guard
Date: Tue, 2 May 2023 07:40:34 -0400 [thread overview]
Message-ID: <20230502114034.GA293395@fedora> (raw)
In-Reply-To: <20230501141956.3444868-1-alxndr@bu.edu>
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On Mon, May 01, 2023 at 10:19:56AM -0400, Alexander Bulekov wrote:
> A BH callback can free the BH, causing a use-after-free in aio_bh_call.
> Fix that by keeping a local copy of the re-entrancy guard pointer.
>
> Buglink: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=58513
> Fixes: 9c86c97f12 ("async: Add an optional reentrancy guard to the BH API")
> Signed-off-by: Alexander Bulekov <alxndr@bu.edu>
> ---
> util/async.c | 14 ++++++++------
> 1 file changed, 8 insertions(+), 6 deletions(-)
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
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prev parent reply other threads:[~2023-05-02 11:41 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-01 14:19 [PATCH] async: avoid use-after-free on re-entrancy guard Alexander Bulekov
2023-05-02 7:48 ` Thomas Huth
2023-05-02 11:40 ` Stefan Hajnoczi [this message]
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