diff options
Diffstat (limited to 'kernel/bpf/arena.c')
| -rw-r--r-- | kernel/bpf/arena.c | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/kernel/bpf/arena.c b/kernel/bpf/arena.c index 945a5680f6a5..4b22a651b5d5 100644 --- a/kernel/bpf/arena.c +++ b/kernel/bpf/arena.c @@ -138,7 +138,11 @@ static struct bpf_map *arena_map_alloc(union bpf_attr *attr) INIT_LIST_HEAD(&arena->vma_list); bpf_map_init_from_attr(&arena->map, attr); range_tree_init(&arena->rt); - range_tree_set(&arena->rt, 0, attr->max_entries); + err = range_tree_set(&arena->rt, 0, attr->max_entries); + if (err) { + bpf_map_area_free(arena); + goto err; + } mutex_init(&arena->lock); return &arena->map; @@ -218,7 +222,7 @@ static u64 arena_map_mem_usage(const struct bpf_map *map) struct vma_list { struct vm_area_struct *vma; struct list_head head; - atomic_t mmap_count; + refcount_t mmap_count; }; static int remember_vma(struct bpf_arena *arena, struct vm_area_struct *vma) @@ -228,7 +232,7 @@ static int remember_vma(struct bpf_arena *arena, struct vm_area_struct *vma) vml = kmalloc(sizeof(*vml), GFP_KERNEL); if (!vml) return -ENOMEM; - atomic_set(&vml->mmap_count, 1); + refcount_set(&vml->mmap_count, 1); vma->vm_private_data = vml; vml->vma = vma; list_add(&vml->head, &arena->vma_list); @@ -239,7 +243,7 @@ static void arena_vm_open(struct vm_area_struct *vma) { struct vma_list *vml = vma->vm_private_data; - atomic_inc(&vml->mmap_count); + refcount_inc(&vml->mmap_count); } static void arena_vm_close(struct vm_area_struct *vma) @@ -248,7 +252,7 @@ static void arena_vm_close(struct vm_area_struct *vma) struct bpf_arena *arena = container_of(map, struct bpf_arena, map); struct vma_list *vml = vma->vm_private_data; - if (!atomic_dec_and_test(&vml->mmap_count)) + if (!refcount_dec_and_test(&vml->mmap_count)) return; guard(mutex)(&arena->lock); /* update link list under lock */ @@ -257,8 +261,6 @@ static void arena_vm_close(struct vm_area_struct *vma) kfree(vml); } -#define MT_ENTRY ((void *)&arena_map_ops) /* unused. has to be valid pointer */ - static vm_fault_t arena_vm_fault(struct vm_fault *vmf) { struct bpf_map *map = vmf->vma->vm_file->private_data; |