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Wed, 29 Jul 2026 13:30:51 +0000 (GMT) Received: from localhost (unknown [9.87.133.185]) by smtpav05.fra02v.mail.ibm.com (Postfix) with ESMTPS; Wed, 29 Jul 2026 13:30:51 +0000 (GMT) Date: Wed, 29 Jul 2026 15:30:50 +0200 From: Vasily Gorbik To: Holger Dengler Cc: freude@linux.ibm.com, linux-s390@vger.kernel.org, Heiko Carstens , Alexander Gordeev , ifranzki@linux.ibm.com Subject: Re: [PATCH v1 0/2] s390/zcrypt: Validate length in CCA key requests Message-ID: References: <20260729093616.4184642-1-dengler@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-s390@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20260729093616.4184642-1-dengler@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-GUID: KCIr2dwRM2LMlD7fE0aWYr5KKQxghrvZ X-Proofpoint-ORIG-GUID: KCIr2dwRM2LMlD7fE0aWYr5KKQxghrvZ X-Proofpoint-Spam-Info: AW1haW4tMjYwNzI5MDExMCBTYWx0ZWRfX7D8jcAAN0UFj bkCbIYuTTN1ni/zz/Nqo0AyQM6fS1DMrWmvk/3zVCvKRmdOrl96SLCPJkjE6lrbUWYb9lUnl48u B8aFSMV8JcTOaViRxCOjEdi0ij/Rb8I= X-Authority-Analysis: v=2.4 cv=dYuwG3Xe c=1 sm=1 tr=0 ts=6a6a0090 cx=c_pps a=aDMHemPKRhS1OARIsFnwRA==:117 a=aDMHemPKRhS1OARIsFnwRA==:17 a=IkcTkHD0fZMA:10 a=RAioF0-LDSMA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=U7nrCbtTmkRpXpFmAIza:22 a=r0tFQrFAznK0qOXvjb4A:9 a=QEXdDO2ut3YA:10 a=zgiPjhLxNE0A:10 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzI5MDExMCBTYWx0ZWRfX7ntY4sfVrdWP zv9ffbX8MHk8ye3ywfMkOrFrq/QSrt/qHXkEDtmbqdWeDnZc5axqn2z261ER2H40JVG2hh66EeS Je5usqETGVpPkmgpuuvzDmhyoNg82wouCRxlLdT4D9aWWzvTXQW4SRfBPVyr3fakUI4kjODUlZu ls9aBBxeqY8Y+I5ehvvVmncWlPYvhGJlUTIszrkc/9FuOZm9AIJxF1A2/mIgrzdM5LPuIPCO4uV 6R0mVdS9O1QjjQmK5mVpla5LvdQtL5jv3MlFEAMjgHY6b2MZ0Cy0+zwI9GOykD22tgIHlh4p2eF enBAzf3WMMgQygiJ05fBuu76eqn5cUUguhT7Jd2VzJN4132XmSoY4gYWZfrFGPQ1UiF8EHbkjBw sdP/x+xmWwy0tRyD3aSG/ihmgbe6/fXIIWdtbLH6IfR3zn7ThV5fiUBKYS62kddzzhtmNjLuQBK lCQFK7iT3+/b7m5ld7Q== 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=2026-07-29_05,2026-07-28_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 impostorscore=0 clxscore=1015 phishscore=0 malwarescore=0 spamscore=0 lowpriorityscore=0 bulkscore=0 suspectscore=0 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607290110 On Wed, Jul 29, 2026 at 11:36:14AM +0200, Holger Dengler wrote: > The series contains two missing length field validations for requests > with CCA AES cipher keys and CCA ECC private keys. In both cases, the > length information is used to copy the payload to the request block > without checking the available space. Malformed requests can so cause > out-of-band writes on the heap. > > This series applies on top of Linus' master branch. > > Holger Dengler (2): > s390/zcrypt: Validate length for CCA AES cipher key requests > s390/zcrypt: Validate length for CCA ECC private key requests > > drivers/s390/crypto/zcrypt_ccamisc.c | 6 ++++++ > 1 file changed, 6 insertions(+) Applied, thank you!