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Tue, 27 Oct 2026 14:30:31 +0000 (GMT) Received: from tuxmaker.lnxne.boe (unknown [9.87.85.9]) by smtpav01.fra02v.mail.ibm.com (Postfix) with ESMTP; Tue, 27 Oct 2026 14:30:31 +0000 (GMT) From: Heiko Carstens To: Alexander Gordeev , Sven Schnelle , Vasily Gorbik , Christian Borntraeger , Ilya Leoshkevich Cc: linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org Subject: [PATCH v2 05/10] s390/module: Serialize text patching with text_mutex Date: Tue, 27 Oct 2026 15:30:25 +0100 Message-ID: <20261027143030.3154657-6-hca@linux.ibm.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20261027143030.3154657-1-hca@linux.ibm.com> References: <20261027143030.3154657-1-hca@linux.ibm.com> X-Mailing-List: linux-s390@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Spam-Info: AW1haW4tMjYxMDI3MDA1NiBTYWx0ZWRfX1sbAzsCcC0CB sKJBtW/0EvnKN5fUzdIR0d93aBKD4yFXCmGUt54hi/GFGT5o2w1CWFWjU3yiCLiCD/heyVVZqMH WKCvmHx2+DXWHCqVpsUmFgwmw78qTCA= X-Proofpoint-ORIG-GUID: EuTQVsJWdJoaQYIU304Up1pM8D5aWSNA X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMDI3MDA1NiBTYWx0ZWRfXxYPcbdzxaZkP 9mA/13swVStjD9gfaRso/RM0ptxLV90YomRontq8ODK+2TCSkgdANY82mWwXe6dEqwOd/R5Tt7r qNcO7/IF5Nl3GLTKaWu00mVBI4jH4TrAe/pQGgIVS6ZZHGkkutzZCeO4MllHERlzndYEcs+2GVc a9QTb6EI2IY3yoGsRXgvA/sJ28fcceVslR0pz79SCh9uUWsu6w3afg/YNaCkOuhpnv6sHNghgAM 1zi9QTQRcDYKK0mbD2UcZykOJ5ofspPmWa7DW6K0PPphg1q8N6TaoHg/kkToujZ7CydQNQ3jJ1R ccaJpRrO0NQNZeICfBX+VUKrGaBsHlI4Uwscy2R7sscCuRkl7tSmcAU9xv1Y37Ohk+JOIaVy1Tj egNP5T2whNmhsDnFwakY8CIAWxoBBJIW7DHm1Y43o1KOAlWIp+uah/b5/hZUEFhCYdQtVhV92+M axZgUiHM4rccOcFAuKA== X-Authority-Analysis: v=2.4 cv=G7uJgNk5 c=1 sm=1 tr=0 ts=6ae0b58c cx=c_pps a=aDMHemPKRhS1OARIsFnwRA==:117 a=aDMHemPKRhS1OARIsFnwRA==:17 a=660iZSQnnn4A:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=Y2IxJ9c9Rs8Kov3niI8_:22 a=VnNF1IyMAAAA:8 a=z_AhinQEcSNdGhEKinwA:9 a=ZXulRonScM0A:10 X-Proofpoint-GUID: EuTQVsJWdJoaQYIU304Up1pM8D5aWSNA X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.138,FMLib:17.12.100.49 definitions=2026-10-27_03,2026-10-21_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 adultscore=0 impostorscore=0 suspectscore=0 clxscore=1015 phishscore=0 spamscore=0 malwarescore=0 lowpriorityscore=0 priorityscore=1501 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2610190000 definitions=main-2610270056 Acquire text_mutex in apply_relocate_add() in order to serialize text patching. This is part of larger series where at the end s390_kernel_write() requires that callers hold text_mutex for serialization. Signed-off-by: Heiko Carstens --- arch/s390/kernel/module.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/s390/kernel/module.c b/arch/s390/kernel/module.c index 9d1f8a50f5a4..79bc80d7bd02 100644 --- a/arch/s390/kernel/module.c +++ b/arch/s390/kernel/module.c @@ -462,6 +462,7 @@ int apply_relocate_add(Elf_Shdr *sechdrs, const char *strtab, if (!early) write = s390_kernel_write; + guard(mutex)(&text_mutex); return __apply_relocate_add(sechdrs, strtab, symindex, relsec, me, write); } -- 2.53.0