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bh=kWlk0RfHP85NHjTYR1qqmW5V+NFFmlDtq7OQu6ex83E=; b=ZdnqONjmdxUdiQp1NWZx0aqfcG3zvKzRbX0by1LSR9IABbxBOsRmNl4z04Qd9XOBBWkMuK b8vXRBQ2M9MnEzHrllT6EDaai94LbBpSRLbtdhtHxb4oVDGGv1+FmIqFLrLF6J8vH14Vhk Zsfkci+UXRlFUm96x0Og5arkaeQ9yy8= X-MC-Unique: QVpRdZtAP5yXOXyBY5HTqw-1 From: Max Reitz To: qemu-block@nongnu.org Subject: [PULL 01/31] block/block-copy: block_copy_dirty_clusters: fix failure check Date: Mon, 6 Jul 2020 12:04:02 +0200 Message-Id: <20200706100432.2301919-2-mreitz@redhat.com> In-Reply-To: <20200706100432.2301919-1-mreitz@redhat.com> References: <20200706100432.2301919-1-mreitz@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=mreitz@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; 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charset="utf-8" From: Vladimir Sementsov-Ogievskiy ret may be > 0 on success path at this point. Fix assertion, which may crash currently. Fixes: 4ce5dd3e9b5ee0fac18625860eb3727399ee965e Signed-off-by: Vladimir Sementsov-Ogievskiy Message-Id: <20200526181347.489557-1-vsementsov@virtuozzo.com> Signed-off-by: Max Reitz --- block/block-copy.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/block/block-copy.c b/block/block-copy.c index bb8d0569f2..f7428a7c08 100644 --- a/block/block-copy.c +++ b/block/block-copy.c @@ -622,8 +622,10 @@ out: * block_copy_task_run. If it fails, it means some task already fa= iled * for real reason, let's return first failure. * Still, assert that we don't rewrite failure by success. + * + * Note: ret may be positive here because of block-status result. */ - assert(ret =3D=3D 0 || aio_task_pool_status(aio) < 0); + assert(ret >=3D 0 || aio_task_pool_status(aio) < 0); ret =3D aio_task_pool_status(aio); =20 aio_task_pool_free(aio); --=20 2.26.2