[PATCH net-next 03/10] mptcp: pm: add a build check for userspace_pm_dump_addr
From: Matthieu Baerts (NGI0)
Date: Fri Feb 21 2025 - 10:49:34 EST
From: Geliang Tang <tanggeliang@xxxxxxxxxx>
This patch adds a build check for mptcp_userspace_pm_dump_addr() to make
sure there is enough space in 'cb->ctx' to store an address id bitmap.
Just in case info stored in 'cb->ctx' are increased later.
Signed-off-by: Geliang Tang <tanggeliang@xxxxxxxxxx>
Reviewed-by: Matthieu Baerts (NGI0) <matttbe@xxxxxxxxxx>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@xxxxxxxxxx>
---
net/mptcp/pm_userspace.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/net/mptcp/pm_userspace.c b/net/mptcp/pm_userspace.c
index 277cf092a87042a85623470237a8ef24d29e65e6..b69fb5b18130cb3abd08e3ef47004f599895486a 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);
--
2.47.1