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Tue, 18 Aug 2026 07:49:37 +0000 (GMT) Received: from [9.224.91.220] (unknown [9.224.91.220]) by smtpav05.fra02v.mail.ibm.com (Postfix) with ESMTP; Tue, 18 Aug 2026 07:49:37 +0000 (GMT) Message-ID: <8fd6af9c-6e4e-4b13-8499-786576208df2@linux.ibm.com> Date: Tue, 18 Aug 2026 09:49:37 +0200 Precedence: bulk X-Mailing-List: linux-crypto@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 3/6] s390/crypto: Fix use of mutex in atomic context in PAES To: Harald Freudenberger Cc: fcallies@linux.ibm.com, ifranzki@linux.ibm.com, linux-s390@vger.kernel.org, Heiko Carstens , Vasily Gorbik , Alexander Gordeev , linux-crypto@vger.kernel.org References: <20260817141654.77940-1-freude@linux.ibm.com> <20260817141654.77940-4-freude@linux.ibm.com> From: Holger Dengler Content-Language: en-US, de-DE In-Reply-To: <20260817141654.77940-4-freude@linux.ibm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: GJIF52f3MkhUJNxT09zXHW3BEjy-WFOL X-Authority-Analysis: v=2.4 cv=NLLlPU6g c=1 sm=1 tr=0 ts=6a840e97 cx=c_pps a=3Bg1Hr4SwmMryq2xdFQyZA==:117 a=3Bg1Hr4SwmMryq2xdFQyZA==:17 a=IkcTkHD0fZMA:10 a=Sv0fKeRqtYgA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=U7nrCbtTmkRpXpFmAIza:22 a=VnNF1IyMAAAA:8 a=VwQbUJbxAAAA:8 a=tge1r-VoQCY2V-tqNwcA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 X-Proofpoint-Spam-Info: AW1haW4tMjYwODE4MDA1NSBTYWx0ZWRfX3WmZVI8/1+96 +mU9IAsTAsGDsfZBwpbUxoabDG3qQYe2bUfgJu/rdnE2Qjs7ynDrgI68JFko+OtsIFIXkFzzmHd D7FL9r9dwb4wAtlhnt6SunNQwZst5lw= X-Proofpoint-ORIG-GUID: GJIF52f3MkhUJNxT09zXHW3BEjy-WFOL X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwODE4MDA1NSBTYWx0ZWRfX0hfUNv4N21qm JOiDGWvTP/H9p1w/s8kTN/UvXMlUq3b5Rct/FqGuWIqmMXknZSDo+aowIVfBwhV6KxabGbbzq8s sSBKG0Ohr1rR5iYGxg2JLJnNRkUyjMBO7tl6MO7UdugYxTjzs7iL4E8Hr65KouCb/crl2iNZP2k jLAs+pHjw1mNEScuCempTaLmcYa+HgyKsg4eL3p1FovZUq9hkkw4bpbZse8/YSroRj3v0VIxIHO Dv8n4PEekEP+JZ3P1IVBw7iNeSMHia9utkHoU5Z2p1O7zqv0pKBsOxDxu8AHXJmTa/0CkWiMdQP qUBJvMnFCTRj3YP/WYCfvVsr10hUonvB2LlofZLWu1C2d86saIkGJ+nXaDhyywD8lH6kOyLEKCR j0QLNyXJkrriXZU8csjJm0jw3qotQUfbk/lBuPdhrMOoMz5ABSzIVlZiFvc5BKuNpMaSjhjwdlH NG01oPsb3q3kMqIaqXQ== 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=2026-08-17_04,2026-08-12_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 spamscore=0 lowpriorityscore=0 phishscore=0 impostorscore=0 malwarescore=0 suspectscore=0 clxscore=1015 adultscore=0 priorityscore=1501 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2608180055 On 8/17/26 16:16, Harald Freudenberger wrote: > The PAES CTR implementation used a mutex to lock one page of exclusive > memory for fast CTR processing. Unfortunately a mutex is not save to > use in atomic or interrupt context. So use a binary semaphore instead > which is save to use in such environments. > > Fixes: 6cd87cb5ef6c ("s390/crypto: Rework protected key AES for true asynch support") > Signed-off-by: Harald Freudenberger > Cc: stable@vger.kernel.org # 6.16+ Reviewed-by: Holger Dengler -- Mit freundlichen Grüßen / Kind regards Holger Dengler