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authorGeliang Tang <tanggeliang@kylinos.cn>2025-02-21 16:43:56 +0100
committerJakub Kicinski <kuba@kernel.org>2025-02-24 18:23:43 -0800
commit63132fb054744e58de61d45a6d4f2a707cdfcfb3 (patch)
tree7636cf21e64c32aa24611ba521b25e451dcc83ba
parentmptcp: pm: change to fullmesh only for 'subflow' (diff)
downloadlinux-rng-63132fb054744e58de61d45a6d4f2a707cdfcfb3.tar.xz
linux-rng-63132fb054744e58de61d45a6d4f2a707cdfcfb3.zip
mptcp: pm: add a build check for userspace_pm_dump_addr
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@kylinos.cn> Reviewed-by: Matthieu Baerts (NGI0) <matttbe@kernel.org> Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org> Link: https://patch.msgid.link/20250221-net-next-mptcp-pm-misc-cleanup-3-v1-3-2b70ab1cee79@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
-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);