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Fri, 14 Aug 2026 13:21:43 +0000 (GMT) Received: from [9.111.74.75] (unknown [9.111.74.75]) by smtpav01.fra02v.mail.ibm.com (Postfix) with ESMTP; Fri, 14 Aug 2026 13:21:43 +0000 (GMT) Message-ID: <3a21be7a-3377-4a45-b802-266fa8bd2a1b@linux.ibm.com> Date: Fri, 14 Aug 2026 15:21:43 +0200 Precedence: bulk X-Mailing-List: linux-s390@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 3/3] s390/crypto: Fix use of mutex in atomic context 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: <20260814123711.61145-1-freude@linux.ibm.com> <20260814123711.61145-4-freude@linux.ibm.com> From: Holger Dengler Content-Language: en-US, de-DE In-Reply-To: <20260814123711.61145-4-freude@linux.ibm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwODE0MDA5OSBTYWx0ZWRfX6kUBoYbVfNnx qE50FbkFLCPQMwcgXIMGLPQ8JC/0b6MSWXU59Ot+jHHZX+0mbN1lVw+jpLC00bvPFd8MV7Dudob +ePzgQaks/WXCHYRIt+ICcD56BKIvX1OLWcGQQj1KXzhiP9XtktbsZqGDzZPfcIjTRFy4zfiX0+ 81dwOlIQOxKMD59U1ChQnFXIsytE5kxRWfV9XB8yAscdAQfoSV4NYGlMAOrGIALXPazYHcv9K/6 5lY7tP9vIiEYM155Nl6P3BUV2bNupnrg6uTGpFJhTuT4jWO6all+q9pcmvRHxt35YX3Y2rrdfR2 S8rx5lduLNxcFhnQiJCAmdo///zuSpI0uZNr0o0mkg4gm9KbC+2NVnYctNQOC4y0iuprhZKu5NF UZxV6c2Pq9aZ31OL/bFNok02FTQP/SnropiebtFUTYmz4cFT5LnpLCkzrqQwMM0zOtxrBZTIXNv LJBvEQy8bujX404vwEA== X-Proofpoint-Spam-Info: AW1haW4tMjYwODE0MDA5OSBTYWx0ZWRfX2G/3zciVhi0/ WbNWzTHeBTpPthnujTQGUqkLBA4vryGHBJBEwFoksJId50Dvt9CDKlbkMz4fsfck6dNyVjrqCtS xoIliiNmjNYLY1jU7DAqCkx5z5TWvIs= X-Authority-Analysis: v=2.4 cv=RqD16imK c=1 sm=1 tr=0 ts=6a7f166c cx=c_pps a=aDMHemPKRhS1OARIsFnwRA==:117 a=aDMHemPKRhS1OARIsFnwRA==:17 a=IkcTkHD0fZMA:10 a=Sv0fKeRqtYgA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=uAbxVGIbfxUO_5tXvNgY:22 a=VnNF1IyMAAAA:8 a=VwQbUJbxAAAA:8 a=tge1r-VoQCY2V-tqNwcA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 X-Proofpoint-GUID: xt5foZkkSUnxBGLpbi8lvsIQNtayYfRN X-Proofpoint-ORIG-GUID: xt5foZkkSUnxBGLpbi8lvsIQNtayYfRN 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=2026-08-14_04,2026-08-12_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 priorityscore=1501 suspectscore=0 lowpriorityscore=0 clxscore=1015 adultscore=0 bulkscore=0 malwarescore=0 impostorscore=0 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2608140099 On 8/14/26 14:37, Harald Freudenberger wrote: > The AES 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: 7988fb2c03c8 ("crypto: s390/aes - convert to skcipher API") > Suggested-by: Heiko Carstens > Signed-off-by: Harald Freudenberger > Cc: stable@vger.kernel.org # 5.5+ Reviewed-by: Holger Dengler -- Mit freundlichen Grüßen / Kind regards Holger Dengler