diff options
| author | Paolo Abeni <pabeni@redhat.com> | 2022-07-08 16:36:09 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-07-11 11:31:38 +0100 |
| commit | 5c835bb142d4013c2ab24bff5ae9f6709a39cbcf (patch) | |
| tree | 7213de53b91b9a42654da4d4988ed6d1676c3be2 /net/mptcp | |
| parent | 72a0b329114b1caa8e69dfa7cdad1dd3c69b8602 (diff) | |
mptcp: fix subflow traversal at disconnect time
At disconnect time the MPTCP protocol traverse the subflows
list closing each of them. In some circumstances - MPJ subflow,
passive MPTCP socket, the latter operation can remove the
subflow from the list, invalidating the current iterator.
Address the issue using the safe list traversing helper
variant.
Reported-by: van fantasy <g1042620637@gmail.com>
Fixes: b29fcfb54cd7 ("mptcp: full disconnect implementation")
Tested-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/mptcp')
| -rw-r--r-- | net/mptcp/protocol.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c index cc21fafd9726..21a3ed64226e 100644 --- a/net/mptcp/protocol.c +++ b/net/mptcp/protocol.c @@ -2919,12 +2919,12 @@ static void mptcp_copy_inaddrs(struct sock *msk, const struct sock *ssk) static int mptcp_disconnect(struct sock *sk, int flags) { - struct mptcp_subflow_context *subflow; + struct mptcp_subflow_context *subflow, *tmp; struct mptcp_sock *msk = mptcp_sk(sk); inet_sk_state_store(sk, TCP_CLOSE); - mptcp_for_each_subflow(msk, subflow) { + list_for_each_entry_safe(subflow, tmp, &msk->conn_list, node) { struct sock *ssk = mptcp_subflow_tcp_sock(subflow); __mptcp_close_ssk(sk, ssk, subflow, MPTCP_CF_FASTCLOSE); |