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Wed, 12 Aug 2026 15:55:30 +0000 (GMT) Received: from [127.0.1.1] (unknown [9.87.85.9]) by smtpav01.fra02v.mail.ibm.com (Postfix) with ESMTP; Wed, 12 Aug 2026 15:55:30 +0000 (GMT) From: Steffen Eiden Date: Wed, 12 Aug 2026 17:55:19 +0200 Subject: [PATCH v3 1/2] s390/uv: Fix loop condition in uv_find_secrets Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260812-uv_secrets_fix-v3-1-a85bd29e0666@linux.ibm.com> References: <20260812-uv_secrets_fix-v3-0-a85bd29e0666@linux.ibm.com> In-Reply-To: <20260812-uv_secrets_fix-v3-0-a85bd29e0666@linux.ibm.com> To: Christian Borntraeger , Janosch Frank , Claudio Imbrenda Cc: David Hildenbrand , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Sven Schnelle , Christoph Schlameuss , Harald Freudenberger , Steffen Eiden , kvm@vger.kernel.org, linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org X-Mailer: b4 0.14.3 X-TM-AS-GCONF: 00 X-Authority-Analysis: v=2.4 cv=XqfK/1F9 c=1 sm=1 tr=0 ts=6a7c9777 cx=c_pps a=GFwsV6G8L6GxiO2Y/PsHdQ==:117 a=GFwsV6G8L6GxiO2Y/PsHdQ==:17 a=IkcTkHD0fZMA:10 a=Sv0fKeRqtYgA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=V8glGbnc2Ofi9Qvn3v5h:22 a=VnNF1IyMAAAA:8 a=oTDM0dCkufzkdTJShNUA:9 a=QEXdDO2ut3YA:10 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwODEyMDEyNiBTYWx0ZWRfX/pmYfJCXnliq s3nn2O8sWlWrhw3l4JL2f7oX62/8jGBOnng3qw/KtJNLoIUywnaG+qHL947TLw2O/c3fKEE/MXv nCdHviIQ/UVSiOySgBs7EUWtx72wZjaSBHRVeeKLOI8/qiERwnNMzuJdGq1GHmiWWAnOlexI4JL Hc+nPYr49GCdVmeJSCESjx2pp3sZ+NcFjcxw63ujkEesWFcMuWjF+7LF41qXyFzEr/QSLgBdizc OcslOvnesNqG5x4X6sea9J9Sy1rNAfmDaGfOip9phgzDzU2sV/nzy0zmZRheh8CWiX3yC+6jwfw TQODnYCU1aI48ZQAGUUuqpb8jdc61k/67Qmpmid51KuKGH7+1deo7tfMuCmvYZNFZzPQhp6SaSx XEg1iYimWooAbVN3xkUlIEJVP2BDUQHHTkUwOv8AC0A8pUUvOc9C52muLUWFy5s+zYap0NVE1Up 7tU2GKszZr0PUm78/+w== X-Proofpoint-ORIG-GUID: hkT91K23QGPzGq3rhLJIUNHC94qPraFJ X-Proofpoint-GUID: hkT91K23QGPzGq3rhLJIUNHC94qPraFJ X-Proofpoint-Spam-Info: AW1haW4tMjYwODEyMDEyNiBTYWx0ZWRfX0t4PvnUn0jqh FWdOuN6K4i42eUsIwRxO+vH/yluO27NOPOdboMxB+QBCC910oStZeJB/+K9QjGWXLOfNMCe0B2i cICj8bEeyIKjLE0Vyi5yC3xaHxMnCrY= 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=2026-08-12_04,2026-08-12_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 spamscore=0 adultscore=0 malwarescore=0 clxscore=1015 suspectscore=0 priorityscore=1501 impostorscore=0 phishscore=0 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2608120126 Systems with more than 85 UV secrets got -ENOENT for any secret past the first page. Fix this by setting the start index at the beginning of the loop in uv_find_secret() and not at the end. First test if there are more secrets left by comparing start_idx with list->next_secret_idx, and then set the start index to the next secret index. Fixes: 7c9137af2042 ("s390/uv: Retrieve UV secrets support") Acked-by: Claudio Imbrenda Reviewed-by: Christoph Schlameuss Signed-off-by: Steffen Eiden --- arch/s390/kernel/uv.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/arch/s390/kernel/uv.c b/arch/s390/kernel/uv.c index a284f98d9716..d970b15ef126 100644 --- a/arch/s390/kernel/uv.c +++ b/arch/s390/kernel/uv.c @@ -781,11 +781,14 @@ int uv_find_secret(const u8 secret_id[UV_SECRET_ID_LEN], struct uv_secret_list *list, struct uv_secret_list_item_hdr *secret) { - u16 start_idx = 0; + u16 start_idx; u16 list_rc; int ret; + list->next_secret_idx = 0; + do { + start_idx = list->next_secret_idx; uv_list_secrets(list, start_idx, &list_rc, NULL); if (list_rc != UVC_RC_EXECUTED && list_rc != UVC_RC_MORE_DATA) { if (list_rc == UVC_RC_INV_CMD) @@ -796,7 +799,6 @@ int uv_find_secret(const u8 secret_id[UV_SECRET_ID_LEN], ret = find_secret_in_page(secret_id, list, secret); if (ret == 0) return ret; - start_idx = list->next_secret_idx; } while (list_rc == UVC_RC_MORE_DATA && start_idx < list->next_secret_idx); return -ENOENT; -- 2.53.0