Gerald Schaefer 41ac42f137 s390/mm: do not trigger write fault when vma does not allow VM_WRITE ... For non-protection pXd_none() page faults in do_dat_exception(), we call do_exception() with access == (VM_READ | VM_WRITE | VM_EXEC). In do_exception(), vma->vm_flags is checked against that before calling handle_mm_fault(). Since commit 92f842eac7 ("[S390] store indication fault optimization"), we call handle_mm_fault() with FAULT_FLAG_WRITE, when recognizing that it was a write access. However, the vma flags check is still only checking against (VM_READ | VM_WRITE | VM_EXEC), and therefore also calling handle_mm_fault() with FAULT_FLAG_WRITE in cases where the vma does not allow VM_WRITE. Fix this by changing access check in do_exception() to VM_WRITE only, when recognizing write access. Link: https://lkml.kernel.org/r/20220811103435.188481-3-david@redhat.com Fixes: 92f842eac7 ("[S390] store indication fault optimization") Cc: <stable@vger.kernel.org> Reported-by: David Hildenbrand <david@redhat.com> Reviewed-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Gerald Schaefer <gerald.schaefer@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>		2022-08-25 15:12:32 +02:00
..
appldata	s390/appldata: use struct_size() helper	2020-06-29 16:32:34 +02:00
boot	s390 updates for 5.20 merge window	2022-08-06 17:05:21 -07:00
configs	random: remove CONFIG_ARCH_RANDOM	2022-07-18 15:03:37 +02:00
crypto	s390 updates for 5.20 merge window	2022-08-06 17:05:21 -07:00
hypfs	s390/hypfs: avoid error message under KVM	2022-08-15 17:19:51 +02:00
include	Bitmap patches for v6.0-rc1	2022-08-07 17:52:35 -07:00
kernel	s390: fix double free of GS and RI CBs on fork() failure	2022-08-25 15:12:32 +02:00
kvm	KVM: s390: resetting the Topology-Change-Report	2022-07-20 10:57:37 +02:00
lib	s390/nospec: build expoline.o for modules_prepare target	2022-07-13 15:21:55 +02:00
mm	s390/mm: do not trigger write fault when vma does not allow VM_WRITE	2022-08-25 15:12:32 +02:00
net	s390/bpf: Fix typo in comment	2022-05-23 11:25:53 -07:00
pci	pci-v5.20-changes	2022-08-04 19:30:35 -07:00
purgatory	s390/purgatory: remove duplicated build rule of kexec-purgatory.o	2022-06-30 14:18:16 +02:00
tools	KVM: s390: Add facility 197 to the allow list	2022-07-13 15:25:25 +02:00
Kbuild	kbuild: use more subdir- for visiting subdirectories while cleaning	2021-10-24 13:49:46 +09:00
Kconfig	Random number generator updates for Linux 6.0-rc1.	2022-08-02 17:31:35 -07:00
Kconfig.debug	s390/Kconfig.debug: fix indentation	2022-06-01 12:03:15 +02:00
Makefile	s390/nospec: remove unneeded header includes	2022-07-13 15:21:55 +02:00