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-rw-r--r--net/mptcp/pm_userspace.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/net/mptcp/pm_userspace.c b/net/mptcp/pm_userspace.c
index 277cf092a870..b69fb5b18130 100644
--- a/net/mptcp/pm_userspace.c
+++ b/net/mptcp/pm_userspace.c
@@ -643,6 +643,8 @@ int mptcp_userspace_pm_dump_addr(struct sk_buff *msg,
struct sock *sk;
void *hdr;
+ BUILD_BUG_ON(sizeof(struct id_bitmap) > sizeof(cb->ctx));
+
bitmap = (struct id_bitmap *)cb->ctx;
msk = mptcp_userspace_pm_get_sock(info);