Merge tag 'kvm-s390-master-5.7-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into kvm-master

KVM: s390: Fix for 5.7 and maintainer update

- Silence false positive lockdep warning
- add Claudio as reviewer

3 files changed, 9 insertions, 12 deletions

diff --git a/kernel/bpf/bpf_lru_list.h b/kernel/bpf/bpf_lru_list.h
index f02504640e18..6b12f06ee18c 100644
--- a/kernel/bpf/bpf_lru_list.h
+++ b/kernel/bpf/bpf_lru_list.h
@@ -30,7 +30,7 @@ struct bpf_lru_node {
 struct bpf_lru_list {
 	struct list_head lists[NR_BPF_LRU_LIST_T];
 	unsigned int counts[NR_BPF_LRU_LIST_COUNT];
-	/* The next inacitve list rotation starts from here */
+	/* The next inactive list rotation starts from here */
 	struct list_head *next_inactive_rotation;
 
 	raw_spinlock_t lock ____cacheline_aligned_in_smp;
diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c
index 64783da34202..d85f37239540 100644
--- a/kernel/bpf/syscall.c
+++ b/kernel/bpf/syscall.c
@@ -586,9 +586,7 @@ static void bpf_map_mmap_open(struct vm_area_struct *vma)
 {
 	struct bpf_map *map = vma->vm_file->private_data;
 
-	bpf_map_inc_with_uref(map);
-
-	if (vma->vm_flags & VM_WRITE) {
+	if (vma->vm_flags & VM_MAYWRITE) {
 		mutex_lock(&map->freeze_mutex);
 		map->writecnt++;
 		mutex_unlock(&map->freeze_mutex);
@@ -600,13 +598,11 @@ static void bpf_map_mmap_close(struct vm_area_struct *vma)
 {
 	struct bpf_map *map = vma->vm_file->private_data;
 
-	if (vma->vm_flags & VM_WRITE) {
+	if (vma->vm_flags & VM_MAYWRITE) {
 		mutex_lock(&map->freeze_mutex);
 		map->writecnt--;
 		mutex_unlock(&map->freeze_mutex);
 	}
-
-	bpf_map_put_with_uref(map);
 }
 
 static const struct vm_operations_struct bpf_map_default_vmops = {
@@ -635,14 +631,16 @@ static int bpf_map_mmap(struct file *filp, struct vm_area_struct *vma)
 	/* set default open/close callbacks */
 	vma->vm_ops = &bpf_map_default_vmops;
 	vma->vm_private_data = map;
+	vma->vm_flags &= ~VM_MAYEXEC;
+	if (!(vma->vm_flags & VM_WRITE))
+		/* disallow re-mapping with PROT_WRITE */
+		vma->vm_flags &= ~VM_MAYWRITE;
 
 	err = map->ops->map_mmap(map, vma);
 	if (err)
 		goto out;
 
-	bpf_map_inc_with_uref(map);
-
-	if (vma->vm_flags & VM_WRITE)
+	if (vma->vm_flags & VM_MAYWRITE)
 		map->writecnt++;
 out:
 	mutex_unlock(&map->freeze_mutex);
diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index 04c6630cc18f..38cfcf701eeb 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -1255,8 +1255,7 @@ static void __mark_reg_unknown(const struct bpf_verifier_env *env,
 	reg->type = SCALAR_VALUE;
 	reg->var_off = tnum_unknown;
 	reg->frameno = 0;
-	reg->precise = env->subprog_cnt > 1 || !env->allow_ptr_leaks ?
-		       true : false;
+	reg->precise = env->subprog_cnt > 1 || !env->allow_ptr_leaks;
 	__mark_reg_unbounded(reg);
 }