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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 1/2] mseal sysmap: generic vdso vvar mapping Date: Tue, 11 Mar 2025 13:33:25 +0100 Message-ID: <20250311123326.2686682-2-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: MxwBgJQM4sBjzJFJ2-JrRCRRAnWtOPgo X-Proofpoint-ORIG-GUID: MxwBgJQM4sBjzJFJ2-JrRCRRAnWtOPgo 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=862 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 With the introduction of the generic vdso data storage the VM_SEALED_SYSMAP vm flag must be moved from the architecture specific _install_special_mapping() call [1] [2] which maps the vvar mapping to generic code. [1] https://lkml.kernel.org/r/20250305021711.3867874-4-jeffxu@google.com [2] https://lkml.kernel.org/r/20250305021711.3867874-5-jeffxu@google.com Signed-off-by: Heiko Carstens Reviewed-by: Lorenzo Stoakes Reviewed-by: Jeff Xu --- lib/vdso/datastore.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/lib/vdso/datastore.c b/lib/vdso/datastore.c index e227fbbcb796..b7c7386c98a9 100644 --- a/lib/vdso/datastore.c +++ b/lib/vdso/datastore.c @@ -99,7 +99,8 @@ const struct vm_special_mapping vdso_vvar_mapping = { struct vm_area_struct *vdso_install_vvar_mapping(struct mm_struct *mm, unsigned long addr) { return _install_special_mapping(mm, addr, VDSO_NR_PAGES * PAGE_SIZE, - VM_READ | VM_MAYREAD | VM_IO | VM_DONTDUMP | VM_PFNMAP, + VM_READ | VM_MAYREAD | VM_IO | VM_DONTDUMP | + VM_PFNMAP | VM_SEALED_SYSMAP, &vdso_vvar_mapping); }