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Tue, 23 Jun 2020 14:12:01 +0000 Received: from d06av22.portsmouth.uk.ibm.com (d06av22.portsmouth.uk.ibm.com [9.149.105.58]) by b06avi18626390.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 05NEAew058851746 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 23 Jun 2020 14:10:41 GMT Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 9FF0E4C072; Tue, 23 Jun 2020 14:11:58 +0000 (GMT) Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 818524C071; Tue, 23 Jun 2020 14:11:58 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.152.85.9]) by d06av22.portsmouth.uk.ibm.com (Postfix) with ESMTPS; Tue, 23 Jun 2020 14:11:58 +0000 (GMT) Received: by tuxmaker.boeblingen.de.ibm.com (Postfix, from userid 25651) id 04F32E13EA; Tue, 23 Jun 2020 16:11:58 +0200 (CEST) From: Christian Borntraeger To: mcgrof@kernel.org Cc: ast@kernel.org, axboe@kernel.dk, bfields@fieldses.org, bridge@lists.linux-foundation.org, chainsaw@gentoo.org, christian.brauner@ubuntu.com, chuck.lever@oracle.com, davem@davemloft.net, dhowells@redhat.com, gregkh@linuxfoundation.org, jarkko.sakkinen@linux.intel.com, jmorris@namei.org, josh@joshtriplett.org, keescook@chromium.org, keyrings@vger.kernel.org, kuba@kernel.org, lars.ellenberg@linbit.com, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nfs@vger.kernel.org, linux-security-module@vger.kernel.org, nikolay@cumulusnetworks.com, philipp.reisner@linbit.com, ravenexp@gmail.com, roopa@cumulusnetworks.com, serge@hallyn.com, slyfox@gentoo.org, viro@zeniv.linux.org.uk, yangtiezhu@loongson.cn, netdev@vger.kernel.org, markward@linux.ibm.com, linux-s390@vger.kernel.or Subject: linux-next: umh: fix processed error when UMH_WAIT_PROC is used seems to break linux bridge on s390x (bisected) Date: Tue, 23 Jun 2020 16:11:57 +0200 Message-Id: <20200623141157.5409-1-borntraeger@de.ibm.com> X-Mailer: git-send-email 2.25.4 In-Reply-To: <20200610154923.27510-5-mcgrof@kernel.org> References: <20200610154923.27510-5-mcgrof@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.216,18.0.687 definitions=2020-06-23_06:2020-06-23,2020-06-23 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 adultscore=0 suspectscore=1 mlxlogscore=865 spamscore=0 bulkscore=0 lowpriorityscore=0 cotscore=-2147483648 mlxscore=0 priorityscore=1501 malwarescore=0 clxscore=1011 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2006230108 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Jens Markwardt reported a regression in the linux-next runs. with "umh: fix processed error when UMH_WAIT_PROC is used" (from linux-next) a linux bridge with an KVM guests no longer activates : without patch # ip addr show dev virbr1 6: virbr1: mtu 1500 qdisc noqueue state UP group default qlen 1000 link/ether 52:54:00:1e:3f:c0 brd ff:ff:ff:ff:ff:ff inet 192.168.254.254/24 brd 192.168.254.255 scope global virbr1 valid_lft forever preferred_lft forever with this patch the bridge stays DOWN with NO-CARRIER # ip addr show dev virbr1 6: virbr1: mtu 1500 qdisc noqueue state DOWN group default qlen 1000 link/ether 52:54:00:1e:3f:c0 brd ff:ff:ff:ff:ff:ff inet 192.168.254.254/24 brd 192.168.254.255 scope global virbr1 valid_lft forever preferred_lft forever This was bisected in linux-next. Reverting from linux-next also fixes the issue. Any idea? Christian