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Tue, 6 Oct 2026 15:46:03 +0000 (GMT) Received: from funtu2.ibm.com (unknown [9.111.134.234]) by smtpav07.fra02v.mail.ibm.com (Postfix) with ESMTP; Tue, 6 Oct 2026 15:46:03 +0000 (GMT) From: Harald Freudenberger To: dengler@linux.ibm.com, fcallies@linux.ibm.com Cc: freude@linux.ibm.com, linux-s390@vger.kernel.org, Heiko Carstens , Vasily Gorbik , Alexander Gordeev Subject: [PATCH v3 0/2] Fix minor LLM findings in zcrypt dd Date: Tue, 6 Oct 2026 17:46:01 +0200 Message-ID: <20261006154603.9699-1-freude@linux.ibm.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-s390@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: Q4Zxafc1WKnSVPqwnxWywOUATGr5U_M6 X-Proofpoint-GUID: Q4Zxafc1WKnSVPqwnxWywOUATGr5U_M6 X-Proofpoint-Spam-Info: AW1haW4tMjYxMDA2MDA2MiBTYWx0ZWRfXxHme51FdDHpw r+D/rj2XN62fAVGHW39Xyv5yc/cJopipHAfkbjx1CpXqd+k1kZCFeNawRh3+qqKJsnaEAgEOluh qg0oA5ghDRkADt+ScZyPlnGyIx0sxsE= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMDA2MDA2MiBTYWx0ZWRfXwylCFPukQ9pz IeDJD8Wa57rvHwgQ2QL99PXLfzh1YvUXp9zTB8K6glZOlZdx0HkmZtcGQ8U1hTcSImWiuTUYy8N FUeXb5gI4LwHKsUdTTv2jVBbJobhMJN1co/skOsirP+yuxEw1vWWaFXJUH7Wxapf84ALf1Iq3w5 kMh2y2V+GBmS+VUjbzZCpMHLvvpvk+JSkUOZNQM07bT99L6Ij8l9p29NCeJmxYgsZv8OFd/Caxv /jHOSe52N+PbIpEuOP1uVnizy9/ZyhtKkf4JpfAo9ewxiITU9MTt55Bgi/PpPIOuHdxRY8VCk7L 803qs/qgYTdOuUlhkACQ39odP9jM4IOkkn9MOrGaydN8x9oeZF5IKbg9zW1vRbxxoaGMddaue5+ k3k9Gz+voKNyRpWg8aDSTFwwMb0K9KoLtscnOIf3pJ8BSpkT4C4k6ZNwmB8b+hXgXdxoarOfEsx sDdVESOyQ7M8aAWgLpQ== X-Authority-Analysis: v=2.4 cv=eYeo7LEH c=1 sm=1 tr=0 ts=6ac517c0 cx=c_pps a=bLidbwmWQ0KltjZqbj+ezA==:117 a=bLidbwmWQ0KltjZqbj+ezA==:17 a=660iZSQnnn4A:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=Y2IxJ9c9Rs8Kov3niI8_:22 a=h2qVecyevSGYt6gzuLQA: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=2026-10-06_04,2026-10-06_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 lowpriorityscore=0 phishscore=0 bulkscore=0 clxscore=1015 spamscore=0 malwarescore=0 priorityscore=1501 impostorscore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2609040000 definitions=main-2610060062 Fix some minor LLM findings related to the zcrypt device driver. Changelog: v1: Two patches: - The first patch fixes a gap related to speculative execution with the domain index. - The second patch fixes a length/pointer check with parsing the FQ reply from a CCA card. v2: Fix a complain from Sashiko about silently dropping invalid domains down to domain value 0. So now a explicit check makes sure domain is either AUTOSEL_DOM or in range 0...255. 2nd patch unchanged. v3: Well this spectre thing points out to be really wired. So here is again a rework claiming it shall protect against speculative execution with respect to the domain value. 2nd patch unchanged. Harald Freudenberger (2): s390/zcrypt: Guard domain index uses against speculative bypass s390/zcrypt: Fix out-of-bounds ptr advance in cca_query_crypto_facility() drivers/s390/crypto/zcrypt_api.c | 35 ++++++++++++++++++++-------- drivers/s390/crypto/zcrypt_ccamisc.c | 22 +++++++++++++++-- 2 files changed, 45 insertions(+), 12 deletions(-) -- 2.43.0