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Wed, 16 Sep 2026 15:10:23 +0000 (GMT) Received: from li-a84c74cc-2b13-11b2-a85c-acdd023f0674.ibm.com.com (unknown [9.61.52.228]) by smtpav05.fra02v.mail.ibm.com (Postfix) with ESMTP; Wed, 16 Sep 2026 15:10:23 +0000 (GMT) From: Nilay Shroff To: hch@lst.de, kbusch@kernel.org, sagi@grimberg.me, kch@nvidia.com Cc: linux-nvme@lists.infradead.org, linux-kernel@vger.kernel.org, gjoyce@linux.ibm.com, Nilay Shroff Subject: [PATCH 0/2] nvmet: fix subtle race in I/O processing and ns configuration Date: Wed, 16 Sep 2026 20:39:58 +0530 Message-ID: <20260916151012.3702896-1-nilay@linux.ibm.com> X-Mailer: git-send-email 2.53.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Spam-Info: AW1haW4tMjYwOTE2MDIwNCBTYWx0ZWRfX6Ys+shPzrXK6 jYasRjqqXJgQcDF01EUjALYCur+lJCwpMCy/c5GW5xzvVERoSi2yBvnhTPslLbRPqzQBYS8+POW rlfuRxvqXp+zC+i9MHDiW0WwTYfyoaY= X-Proofpoint-ORIG-GUID: BaQ7WuAjrWEfOBXYn6c7r31Bb2s5RQlh X-Proofpoint-GUID: BaQ7WuAjrWEfOBXYn6c7r31Bb2s5RQlh X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTE2MDIwNCBTYWx0ZWRfX7rc8EZRMU7/J 2T2Gnm63ZkAH7yWPOfh6x656ddLfy3h+0STUigaTa1z8Dkai0NBVKnG5iUnooZokUqQqS6f+70H Dn64xryvrBKX0FAn0GL23DMXdKiJo5gB/U59BU6thpreX34SoKZmJuu58hxCTP6qgCgQjpusoaa ibbSmnqw/o81PlfY7fY+4smlf6bKusHEwQyGxwnTlABMTI8q9YLN7lz4e82bUzdMEL+bQ3K4J1o juOrq+EjGyS5Qe7ghLdK/+Q2XU3gdXLRQ8Z2A3hlZM1g5Fha/nYNOv8MCKMz1Jq8hv13Nd0DP4y HEjRmIrmToBbSGtlkslUoStqVSyG3xjtheXWvHtaG+zR47vJxamKBlVtJQp4r1LEywLgLT2LBm0 Lhumd24nDXuyVyOrRJIjtM/U/SeS9TQH43M5lit/MtzktQG7zr5g/p9IkOH2kmeUKhGl7ThlXIT AA28dVHZHutiGj0lsnw== X-Authority-Analysis: v=2.4 cv=F+7C5ahN c=1 sm=1 tr=0 ts=6aaab168 cx=c_pps a=3Bg1Hr4SwmMryq2xdFQyZA==:117 a=3Bg1Hr4SwmMryq2xdFQyZA==:17 a=VdqzKS8jKosA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=RzCfie-kr_QcCd8fBx8p:22 a=jaXYEW7WMJ77ULbh9E8A:9 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-09-16_02,2026-09-16_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 suspectscore=0 phishscore=0 clxscore=1015 malwarescore=0 lowpriorityscore=0 bulkscore=0 spamscore=0 impostorscore=0 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2609040000 definitions=main-2609160204 Hi, This series addresses two race conditions in the nvmet core code that handles I/O submission and namespace configuration. The first patch addresses a race where target namespace attributes could be changed while I/O is in progress. The second patch addresses a subtle race that could allow I/O to be admitted even after the percpu reference count has been killed or marked dead. As usual, feedback, comments, and suggestions are most welcome! Thanks! Nilay Shroff (2): nvmet: defer setting ns->enabled to false in nvmet_ns_disable() nvmet: don't allow I/O admission after percpu ns reference is killed drivers/nvme/target/core.c | 23 +++++++++++++++-------- 1 file changed, 15 insertions(+), 8 deletions(-) -- 2.53.0