diff options
Diffstat (limited to 'net')
| -rw-r--r-- | net/core/filter.c | 3 | ||||
| -rw-r--r-- | net/netfilter/nf_bpf_link.c | 3 |
2 files changed, 6 insertions, 0 deletions
diff --git a/net/core/filter.c b/net/core/filter.c index c09a85c17496..da391e2b0788 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -9458,6 +9458,9 @@ static bool flow_dissector_is_valid_access(int off, int size, if (off < 0 || off >= sizeof(struct __sk_buff)) return false; + if (off % size != 0) + return false; + if (type == BPF_WRITE) return false; diff --git a/net/netfilter/nf_bpf_link.c b/net/netfilter/nf_bpf_link.c index 3e4fb9ddcd36..46e667a50d98 100644 --- a/net/netfilter/nf_bpf_link.c +++ b/net/netfilter/nf_bpf_link.c @@ -296,6 +296,9 @@ static bool nf_is_valid_access(int off, int size, enum bpf_access_type type, if (off < 0 || off >= sizeof(struct bpf_nf_ctx)) return false; + if (off % size != 0) + return false; + if (type == BPF_WRITE) return false; |