Merge tag 'irqchip-5.16' into irq/core

Merge irqchip updates for Linux 5.16 from Marc Zyngier:

- A large cross-arch rework to move irq_enter()/irq_exit() into
  the arch code, and removing it from the generic irq code.
  Thanks to Mark Rutland for the huge effort!

- A few irqchip drivers are made modular (broadcom, meson), because
  that's apparently a thing...

- A new driver for the Microchip External Interrupt Controller

- The irq_cpu_offline()/irq_cpu_online() API is now deprecated and
  can only be selected on the Cavium Octeon platform. Once this
  platform is removed, the API will be removed at the same time.

- A sprinkle of devm_* helper, as people seem to love that.

- The usual spattering of small fixes and minor improvements.

* tag 'irqchip-5.16': (912 commits)
  h8300: Fix linux/irqchip.h include mess
  dt-bindings: irqchip: renesas-irqc: Document r8a774e1 bindings
  MIPS: irq: Avoid an unused-variable error
  genirq: Hide irq_cpu_{on,off}line() behind a deprecated option
  irqchip/mips-gic: Get rid of the reliance on irq_cpu_online()
  MIPS: loongson64: Drop call to irq_cpu_offline()
  irq: remove handle_domain_{irq,nmi}()
  irq: remove CONFIG_HANDLE_DOMAIN_IRQ_IRQENTRY
  irq: riscv: perform irqentry in entry code
  irq: openrisc: perform irqentry in entry code
  irq: csky: perform irqentry in entry code
  irq: arm64: perform irqentry in entry code
  irq: arm: perform irqentry in entry code
  irq: add a (temporary) CONFIG_HANDLE_DOMAIN_IRQ_IRQENTRY
  irq: nds32: avoid CONFIG_HANDLE_DOMAIN_IRQ
  irq: arc: avoid CONFIG_HANDLE_DOMAIN_IRQ
  irq: add generic_handle_arch_irq()
  irq: unexport handle_irq_desc()
  irq: simplify handle_domain_{irq,nmi}()
  irq: mips: simplify do_domain_IRQ()
  ...

Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lore.kernel.org/r/20211029083332.3680101-1-maz@kernel.org

1 files changed, 8 insertions, 3 deletions

diff --git a/net/mptcp/token.c b/net/mptcp/token.c
index a98e554b034f..e581b341c5be 100644
--- a/net/mptcp/token.c
+++ b/net/mptcp/token.c
@@ -231,6 +231,7 @@ found:
 
 /**
  * mptcp_token_get_sock - retrieve mptcp connection sock using its token
+ * @net: restrict to this namespace
  * @token: token of the mptcp connection to retrieve
  *
  * This function returns the mptcp connection structure with the given token.
@@ -238,7 +239,7 @@ found:
  *
  * returns NULL if no connection with the given token value exists.
  */
-struct mptcp_sock *mptcp_token_get_sock(u32 token)
+struct mptcp_sock *mptcp_token_get_sock(struct net *net, u32 token)
 {
 	struct hlist_nulls_node *pos;
 	struct token_bucket *bucket;
@@ -251,11 +252,15 @@ struct mptcp_sock *mptcp_token_get_sock(u32 token)
 again:
 	sk_nulls_for_each_rcu(sk, pos, &bucket->msk_chain) {
 		msk = mptcp_sk(sk);
-		if (READ_ONCE(msk->token) != token)
+		if (READ_ONCE(msk->token) != token ||
+		    !net_eq(sock_net(sk), net))
 			continue;
+
 		if (!refcount_inc_not_zero(&sk->sk_refcnt))
 			goto not_found;
-		if (READ_ONCE(msk->token) != token) {
+
+		if (READ_ONCE(msk->token) != token ||
+		    !net_eq(sock_net(sk), net)) {
 			sock_put(sk);
 			goto again;
 		}