diff options
Diffstat (limited to 'kernel/bpf/hashtab.c')
| -rw-r--r-- | kernel/bpf/hashtab.c | 16 |
1 files changed, 5 insertions, 11 deletions
diff --git a/kernel/bpf/hashtab.c b/kernel/bpf/hashtab.c index 23f73d4649c9..7bf18d92af41 100644 --- a/kernel/bpf/hashtab.c +++ b/kernel/bpf/hashtab.c @@ -415,17 +415,11 @@ static int htab_map_alloc_check(union bpf_attr *attr) attr->value_size == 0) return -EINVAL; - if (attr->key_size > MAX_BPF_STACK) - /* eBPF programs initialize keys on stack, so they cannot be - * larger than max stack size - */ - return -E2BIG; - - if (attr->value_size >= KMALLOC_MAX_SIZE - - MAX_BPF_STACK - sizeof(struct htab_elem)) - /* if value_size is bigger, the user space won't be able to - * access the elements via bpf syscall. This check also makes - * sure that the elem_size doesn't overflow and it's + if ((u64)attr->key_size + attr->value_size >= KMALLOC_MAX_SIZE - + sizeof(struct htab_elem)) + /* if key_size + value_size is bigger, the user space won't be + * able to access the elements via bpf syscall. This check + * also makes sure that the elem_size doesn't overflow and it's * kmalloc-able later in htab_map_update_elem() */ return -E2BIG; |