From: YonglongLi <liyonglong@xxxxxxxxxxxxxxx>
commit 6a09788c1a66e3d8b04b3b3e7618cc817bb60ae9 upstream.
The RmAddr MIB counter is supposed to be incremented once when a valid
RM_ADDR has been received. Before this patch, it could have been
incremented as many times as the number of subflows connected to the
linked address ID, so it could have been 0, 1 or more than 1.
The "RmSubflow" is incremented after a local operation. In this case,
it is normal to tied it with the number of subflows that have been
actually removed.
The "remove invalid addresses" MP Join subtest has been modified to
validate this case. A broadcast IP address is now used instead: the
client will not be able to create a subflow to this address. The
consequence is that when receiving the RM_ADDR with the ID attached to
this broadcast IP address, no subflow linked to this ID will be found.
Fixes: 7a7e52e38a40 ("mptcp: add RM_ADDR related mibs")
Cc: stable@xxxxxxxxxxxxxxx
Co-developed-by: Matthieu Baerts (NGI0) <matttbe@xxxxxxxxxx>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@xxxxxxxxxx>
Signed-off-by: YonglongLi <liyonglong@xxxxxxxxxxxxxxx>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20240607-upstream-net-20240607-misc-fixes-v1-2-1ab9ddfa3d00@xxxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
[ Conflicts in pm_netlink.c because the commit 9f12e97bf16c ("mptcp:
unify RM_ADDR and RM_SUBFLOW receiving"), and commit d0b698ca9a27
("mptcp: remove multi addresses in PM") are not in this version. To
fix the issue, the incrementation should be done outside the loop: the
same resolution has been applied here.
The selftest modification has been dropped, because the modified test
is not in this version. That's fine, we can test with selftests from a
newer version. ]
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@xxxxxxxxxx>
---
net/mptcp/pm_netlink.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/net/mptcp/pm_netlink.c b/net/mptcp/pm_netlink.c
index 0d6f3d912891..7472473605e3 100644
--- a/net/mptcp/pm_netlink.c
+++ b/net/mptcp/pm_netlink.c
@@ -427,10 +427,10 @@ void mptcp_pm_nl_rm_addr_received(struct mptcp_sock *msk)
msk->pm.subflows--;
WRITE_ONCE(msk->pm.accept_addr, true);
- __MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_RMADDR);
-
break;
}
+
+ __MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_RMADDR);
}
void mptcp_pm_nl_rm_subflow_received(struct mptcp_sock *msk, u8 rm_id)
--
2.43.0
