1 files changed, 6 insertions, 0 deletions

diff --git a/kernel/bpf/sockmap.c b/kernel/bpf/sockmap.c
index 56879c9fd3a4..79f5e8988889 100644
--- a/kernel/bpf/sockmap.c
+++ b/kernel/bpf/sockmap.c
@@ -1990,6 +1990,12 @@ static struct bpf_map *sock_hash_alloc(union bpf_attr *attr)
             attr->map_flags & ~SOCK_CREATE_FLAG_MASK)
                 return ERR_PTR(-EINVAL);
 
+        if (attr->key_size > MAX_BPF_STACK)
+                /* eBPF programs initialize keys on stack, so they cannot be
+                 * larger than max stack size
+                 */
+                return ERR_PTR(-E2BIG);
+
         err = bpf_tcp_ulp_register();
         if (err && err != -EEXIST)
                 return ERR_PTR(err);