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Howlett" , Kees Cook , =?utf-8?q?Thomas_Wei=C3=9Fschuh?= Cc: Alexander Gordeev , Sven Schnelle , Vasily Gorbik , Christian Borntraeger , linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-hardening@vger.kernel.org Subject: [PATCH mm-unstable 2/2] mseal sysmap: enable s390 Date: Tue, 11 Mar 2025 13:33:26 +0100 Message-ID: <20250311123326.2686682-3-hca@linux.ibm.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20250311123326.2686682-1-hca@linux.ibm.com> References: <20250311123326.2686682-1-hca@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-hardening@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: MtQCe0fUy6IfEAWGegeAn-LxBAPpKsgg X-Proofpoint-ORIG-GUID: MtQCe0fUy6IfEAWGegeAn-LxBAPpKsgg X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1093,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-03-11_02,2025-03-11_02,2024-11-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 bulkscore=0 spamscore=0 mlxlogscore=756 suspectscore=0 phishscore=0 priorityscore=1501 adultscore=0 clxscore=1015 malwarescore=0 impostorscore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2502100000 definitions=main-2503110080 Provide support for CONFIG_MSEAL_SYSTEM_MAPPINGS on s390, covering the vdso. Signed-off-by: Heiko Carstens Reviewed-by: Lorenzo Stoakes Reviewed-by: Jeff Xu --- arch/s390/Kconfig | 1 + arch/s390/kernel/vdso.c | 2 +- 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index 608a965e2344..93b880992596 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -141,6 +141,7 @@ config S390 select ARCH_SUPPORTS_DEBUG_PAGEALLOC select ARCH_SUPPORTS_HUGETLBFS select ARCH_SUPPORTS_INT128 if CC_HAS_INT128 && CC_IS_CLANG + select ARCH_SUPPORTS_MSEAL_SYSTEM_MAPPINGS select ARCH_SUPPORTS_NUMA_BALANCING select ARCH_SUPPORTS_PER_VMA_LOCK select ARCH_USE_BUILTIN_BSWAP diff --git a/arch/s390/kernel/vdso.c b/arch/s390/kernel/vdso.c index 70c8f9ad13cd..430feb1a5013 100644 --- a/arch/s390/kernel/vdso.c +++ b/arch/s390/kernel/vdso.c @@ -80,7 +80,7 @@ static int map_vdso(unsigned long addr, unsigned long vdso_mapping_len) vdso_text_start = vvar_start + VDSO_NR_PAGES * PAGE_SIZE; /* VM_MAYWRITE for COW so gdb can set breakpoints */ vma = _install_special_mapping(mm, vdso_text_start, vdso_text_len, - VM_READ|VM_EXEC| + VM_READ|VM_EXEC|VM_SEALED_SYSMAP| VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC, vdso_mapping); if (IS_ERR(vma)) {