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Sun, 19 Jul 2026 13:00:07 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.87.85.9]) by smtpav04.fra02v.mail.ibm.com (Postfix) with ESMTP; Sun, 19 Jul 2026 13:00:07 +0000 (GMT) From: Heiko Carstens To: Alexander Gordeev , Sven Schnelle , Vasily Gorbik , Christian Borntraeger , Janosch Frank , Claudio Imbrenda , David Hildenbrand Cc: linux-s390@vger.kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 4/6] s390/mm: Fix handling of vmalloc area in do_secure_storage_access() Date: Sun, 19 Jul 2026 15:00:04 +0200 Message-ID: <20260719130006.3882764-5-hca@linux.ibm.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260719130006.3882764-1-hca@linux.ibm.com> References: <20260719130006.3882764-1-hca@linux.ibm.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Authority-Analysis: v=2.4 cv=HJXz0Itv c=1 sm=1 tr=0 ts=6a5cca5c cx=c_pps a=bLidbwmWQ0KltjZqbj+ezA==:117 a=bLidbwmWQ0KltjZqbj+ezA==:17 a=RAioF0-LDSMA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=Y2IxJ9c9Rs8Kov3niI8_:22 a=VnNF1IyMAAAA:8 a=aTeQ_7Lur19LOBhsqlcA:9 a=zZCYzV9kfG8A:10 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzE5MDEzOSBTYWx0ZWRfX3pMSSe1YvNSQ TfBOXKtHZeMw45HnZYP+LSj+jhXUboWyFs+7ovZg8T193kbd0IsUyEklSyqm+s1icBA9hCf5Bci 0/TiTQse622yxlTPFRW47tL41eQb65StOP8CTOoO9Eu8CLidGnyx0n3sFoSt5FQjVzleYdUidhr j6+tC7ZgEIa4ZyYNDhKzd/FO9mKHof60Puz5EdJSirIeKLy0+woSqkkhm5Ku07hnOboTAloxy+l N2bO5Ww8JruR3WIxXNkrCnjFVC/oMaZ2M0Z3Q5MpCbkI3jeVsAAC06eLAqYJanDdRJDujzZkbJ4 J8NSuC5OVXkRs3ysV/RCqUTaeE9KOFZorSXRaCEW90XlEaYo8eo/Sfp5Z3NBtqWIQKse64a9WqS Aoh5+Gv474B/H1kW3bb0Ymbf0NrO3+wzrsKwsiHwqhH/LROzRlGBH3FU4bX28e3c638/EYEaT14 S2eAm2LPQTls/jFxXlg== X-Proofpoint-ORIG-GUID: tKgeSyEP82UEHlq3EB15K0l10Tgvu5HH X-Proofpoint-Spam-Info: AW1haW4tMjYwNzE5MDEzOSBTYWx0ZWRfX9vt35M65N2eR BdKOlgXRnriS5uLhH1nQA+iMdS5qv/RZp8jmG9Pjf3oMCow8zZidwnViDKo42WJKv6D5fRerp5B scfrBm0d7xyg9LuQPluP/8GZf2+OXjQ= X-Proofpoint-GUID: tKgeSyEP82UEHlq3EB15K0l10Tgvu5HH X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-07-19_04,2026-07-17_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 priorityscore=1501 lowpriorityscore=0 suspectscore=0 malwarescore=0 impostorscore=0 clxscore=1015 phishscore=0 spamscore=0 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607190139 Secure storage access exceptions in vmalloc area need to be handled separately since folio_try_get() or virt_to_phys() do not work on such addresses. Given that there cannot be a valid access let such exceptions fail immediately. The kernel will either fixup or crash. Tested-by: Christian Borntraeger Signed-off-by: Heiko Carstens --- arch/s390/mm/fault.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c index f150d97cac2e..e650cdfa2523 100644 --- a/arch/s390/mm/fault.c +++ b/arch/s390/mm/fault.c @@ -438,6 +438,8 @@ void do_secure_storage_access(struct pt_regs *regs) panic("Unexpected PGM 0x3d with TEID bit 61=0"); } if (is_kernel_fault(regs)) { + if (is_vmalloc_addr((void *)addr)) + return handle_fault_error_nolock(regs, 0); folio = virt_to_folio((void *)addr); if (unlikely(!folio_try_get(folio))) return; -- 2.53.0