[PATCH AUTOSEL 5.14 209/252] mptcp: fix ADD_ADDR and RM_ADDR maybe flush addr_signal each other
From: Sasha Levin <sashal@kernel.org>
Date: 2021-09-09 12:01:26
Also in:
lkml, mptcp, stable
Subsystem:
networking [general], networking [mptcp], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Matthieu Baerts, Mat Martineau, Linus Torvalds
From: Yonglong Li <redacted> [ Upstream commit 119c022096f5805680c79dfa74e15044c289856d ] ADD_ADDR shares pm.addr_signal with RM_ADDR, so after RM_ADDR/ADD_ADDR has done, we should not clean ADD_ADDR/RM_ADDR's addr_signal. Co-developed-by: Geliang Tang <redacted> Signed-off-by: Geliang Tang <redacted> Signed-off-by: Yonglong Li <redacted> Signed-off-by: Mat Martineau <redacted> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <sashal@kernel.org> --- net/mptcp/pm.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-)
diff --git a/net/mptcp/pm.c b/net/mptcp/pm.c
index 639271e09604..f47b71a21b7e 100644
--- a/net/mptcp/pm.c
+++ b/net/mptcp/pm.c@@ -253,6 +253,7 @@ bool mptcp_pm_add_addr_signal(struct mptcp_sock *msk, unsigned int remaining, struct mptcp_addr_info *saddr, bool *echo, bool *port) { int ret = false; + u8 add_addr; spin_lock_bh(&msk->pm.lock);
@@ -267,7 +268,11 @@ bool mptcp_pm_add_addr_signal(struct mptcp_sock *msk, unsigned int remaining, goto out_unlock; *saddr = msk->pm.local; - WRITE_ONCE(msk->pm.addr_signal, 0); + if (*echo) + add_addr = msk->pm.addr_signal & ~BIT(MPTCP_ADD_ADDR_ECHO); + else + add_addr = msk->pm.addr_signal & ~BIT(MPTCP_ADD_ADDR_SIGNAL); + WRITE_ONCE(msk->pm.addr_signal, add_addr); ret = true; out_unlock:
@@ -279,6 +284,7 @@ bool mptcp_pm_rm_addr_signal(struct mptcp_sock *msk, unsigned int remaining, struct mptcp_rm_list *rm_list) { int ret = false, len; + u8 rm_addr; spin_lock_bh(&msk->pm.lock);
@@ -286,16 +292,17 @@ bool mptcp_pm_rm_addr_signal(struct mptcp_sock *msk, unsigned int remaining, if (!mptcp_pm_should_rm_signal(msk)) goto out_unlock; + rm_addr = msk->pm.addr_signal & ~BIT(MPTCP_RM_ADDR_SIGNAL); len = mptcp_rm_addr_len(&msk->pm.rm_list_tx); if (len < 0) { - WRITE_ONCE(msk->pm.addr_signal, 0); + WRITE_ONCE(msk->pm.addr_signal, rm_addr); goto out_unlock; } if (remaining < len) goto out_unlock; *rm_list = msk->pm.rm_list_tx; - WRITE_ONCE(msk->pm.addr_signal, 0); + WRITE_ONCE(msk->pm.addr_signal, rm_addr); ret = true; out_unlock:
--
2.30.2