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Merge branch 'mptcp-misc-fixes-for-v6-7'

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Matthieu Baerts says:

====================
mptcp: misc. fixes for v6.7

Here are a few fixes related to MPTCP:

- Patch 1 limits GSO max size to ~64K when MPTCP is being used due to a
  spec limit. 'gso_max_size' can exceed the max value supported by MPTCP
  since v5.19.

- Patch 2 fixes a possible NULL pointer dereference on close that can
  happen since v6.7-rc1.

- Patch 3 avoids sending a RM_ADDR when the corresponding address is no
  longer tracked locally. A regression for a fix backported to v5.19.

- Patch 4 adds a missing lock when changing the IP TOS with setsockopt().
  A fix for v5.17.

- Patch 5 fixes an expectation when running MPTCP Join selftest with the
  checksum option (-C). An issue present since v6.1.
====================

Link: https://lore.kernel.org/r/20231114-upstream-net-20231113-mptcp-misc-fixes-6-7-rc2-v1-0-7b9cd6a7b7f4@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jakub Kicinski 2023-11-14 20:10:45 -08:00
commit a133eae83a
4 changed files with 15 additions and 6 deletions
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5
net/mptcp/pm_netlink.c
View File

@ -1515,8 +1515,9 @@ void mptcp_pm_remove_addrs(struct mptcp_sock *msk, struct list_head *rm_list)
struct mptcp_pm_addr_entry *entry;
list_for_each_entry(entry, rm_list, list) {
remove_anno_list_by_saddr(msk, &entry->addr);
if (alist.nr < MPTCP_RM_IDS_MAX)
if ((remove_anno_list_by_saddr(msk, &entry->addr) ||
lookup_subflow_by_saddr(&msk->conn_list, &entry->addr)) &&
alist.nr < MPTCP_RM_IDS_MAX)
alist.ids[alist.nr++] = entry->addr.id;
}

11
net/mptcp/protocol.c
View File

@ -1230,6 +1230,8 @@ static void mptcp_update_infinite_map(struct mptcp_sock *msk,
mptcp_do_fallback(ssk);
}
#define MPTCP_MAX_GSO_SIZE (GSO_LEGACY_MAX_SIZE - (MAX_TCP_HEADER + 1))
static int mptcp_sendmsg_frag(struct sock *sk, struct sock *ssk,
struct mptcp_data_frag *dfrag,
struct mptcp_sendmsg_info *info)
@ -1256,6 +1258,8 @@ static int mptcp_sendmsg_frag(struct sock *sk, struct sock *ssk,
return -EAGAIN;
/* compute send limit */
if (unlikely(ssk->sk_gso_max_size > MPTCP_MAX_GSO_SIZE))
ssk->sk_gso_max_size = MPTCP_MAX_GSO_SIZE;
info->mss_now = tcp_send_mss(ssk, &info->size_goal, info->flags);
copy = info->size_goal;
@ -3398,10 +3402,11 @@ static void mptcp_release_cb(struct sock *sk)
if (__test_and_clear_bit(MPTCP_CLEAN_UNA, &msk->cb_flags))
__mptcp_clean_una_wakeup(sk);
if (unlikely(msk->cb_flags)) {
/* be sure to set the current sk state before tacking actions
* depending on sk_state, that is processing MPTCP_ERROR_REPORT
/* be sure to set the current sk state before taking actions
* depending on sk_state (MPTCP_ERROR_REPORT)
* On sk release avoid actions depending on the first subflow
*/
if (__test_and_clear_bit(MPTCP_CONNECTED, &msk->cb_flags))
if (__test_and_clear_bit(MPTCP_CONNECTED, &msk->cb_flags) && msk->first)
__mptcp_set_connected(sk);
if (__test_and_clear_bit(MPTCP_ERROR_REPORT, &msk->cb_flags))
__mptcp_error_report(sk);

3
net/mptcp/sockopt.c
View File

@ -738,8 +738,11 @@ static int mptcp_setsockopt_v4_set_tos(struct mptcp_sock *msk, int optname,
val = READ_ONCE(inet_sk(sk)->tos);
mptcp_for_each_subflow(msk, subflow) {
struct sock *ssk = mptcp_subflow_tcp_sock(subflow);
bool slow;
slow = lock_sock_fast(ssk);
__ip_sock_set_tos(ssk, val);
unlock_sock_fast(ssk, slow);
}
release_sock(sk);

2
tools/testing/selftests/net/mptcp/mptcp_join.sh
View File

@ -3240,7 +3240,7 @@ fastclose_tests()
if reset_check_counter "fastclose server test" "MPTcpExtMPFastcloseRx"; then
test_linkfail=1024 fastclose=server \
run_tests $ns1 $ns2 10.0.1.1
chk_join_nr 0 0 0
chk_join_nr 0 0 0 0 0 0 1
chk_fclose_nr 1 1 invert
chk_rst_nr 1 1
fi