6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Geliang Tang <geliang.tang@xxxxxxxx> commit 14cb0e0bf39bd10429ba14e9e2f905f1144226fc upstream. '(struct sock *)msk' is used several times in mptcp_nl_cmd_announce(), mptcp_nl_cmd_remove() or mptcp_userspace_pm_set_flags() in pm_userspace.c, it's worth adding a local variable sk to point it. Reviewed-by: Matthieu Baerts <matttbe@xxxxxxxxxx> Signed-off-by: Geliang Tang <geliang.tang@xxxxxxxx> Signed-off-by: Mat Martineau <martineau@xxxxxxxxxx> Link: https://lore.kernel.org/r/20231025-send-net-next-20231025-v1-8-db8f25f798eb@xxxxxxxxxx Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx> Stable-dep-of: 06afe09091ee ("mptcp: add userspace_pm_lookup_addr_by_id helper") Signed-off-by: Matthieu Baerts (NGI0) <matttbe@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- net/mptcp/pm_userspace.c | 31 ++++++++++++++++++++----------- 1 file changed, 20 insertions(+), 11 deletions(-) --- a/net/mptcp/pm_userspace.c +++ b/net/mptcp/pm_userspace.c @@ -183,6 +183,7 @@ int mptcp_nl_cmd_announce(struct sk_buff struct mptcp_pm_addr_entry addr_val; struct mptcp_sock *msk; int err = -EINVAL; + struct sock *sk; u32 token_val; if (!addr || !token) { @@ -198,6 +199,8 @@ int mptcp_nl_cmd_announce(struct sk_buff return err; } + sk = (struct sock *)msk; + if (!mptcp_pm_is_userspace(msk)) { GENL_SET_ERR_MSG(info, "invalid request; userspace PM not selected"); goto announce_err; @@ -221,7 +224,7 @@ int mptcp_nl_cmd_announce(struct sk_buff goto announce_err; } - lock_sock((struct sock *)msk); + lock_sock(sk); spin_lock_bh(&msk->pm.lock); if (mptcp_pm_alloc_anno_list(msk, &addr_val.addr)) { @@ -231,11 +234,11 @@ int mptcp_nl_cmd_announce(struct sk_buff } spin_unlock_bh(&msk->pm.lock); - release_sock((struct sock *)msk); + release_sock(sk); err = 0; announce_err: - sock_put((struct sock *)msk); + sock_put(sk); return err; } @@ -282,6 +285,7 @@ int mptcp_nl_cmd_remove(struct sk_buff * struct mptcp_sock *msk; LIST_HEAD(free_list); int err = -EINVAL; + struct sock *sk; u32 token_val; u8 id_val; @@ -299,6 +303,8 @@ int mptcp_nl_cmd_remove(struct sk_buff * return err; } + sk = (struct sock *)msk; + if (!mptcp_pm_is_userspace(msk)) { GENL_SET_ERR_MSG(info, "invalid request; userspace PM not selected"); goto remove_err; @@ -309,7 +315,7 @@ int mptcp_nl_cmd_remove(struct sk_buff * goto remove_err; } - lock_sock((struct sock *)msk); + lock_sock(sk); list_for_each_entry(entry, &msk->pm.userspace_pm_local_addr_list, list) { if (entry->addr.id == id_val) { @@ -320,7 +326,7 @@ int mptcp_nl_cmd_remove(struct sk_buff * if (!match) { GENL_SET_ERR_MSG(info, "address with specified id not found"); - release_sock((struct sock *)msk); + release_sock(sk); goto remove_err; } @@ -328,15 +334,15 @@ int mptcp_nl_cmd_remove(struct sk_buff * mptcp_pm_remove_addrs(msk, &free_list); - release_sock((struct sock *)msk); + release_sock(sk); list_for_each_entry_safe(match, entry, &free_list, list) { - sock_kfree_s((struct sock *)msk, match, sizeof(*match)); + sock_kfree_s(sk, match, sizeof(*match)); } err = 0; remove_err: - sock_put((struct sock *)msk); + sock_put(sk); return err; } @@ -558,6 +564,7 @@ int mptcp_userspace_pm_set_flags(struct { struct mptcp_sock *msk; int ret = -EINVAL; + struct sock *sk; u32 token_val; token_val = nla_get_u32(token); @@ -566,6 +573,8 @@ int mptcp_userspace_pm_set_flags(struct if (!msk) return ret; + sk = (struct sock *)msk; + if (!mptcp_pm_is_userspace(msk)) goto set_flags_err; @@ -573,11 +582,11 @@ int mptcp_userspace_pm_set_flags(struct rem->addr.family == AF_UNSPEC) goto set_flags_err; - lock_sock((struct sock *)msk); + lock_sock(sk); ret = mptcp_pm_nl_mp_prio_send_ack(msk, &loc->addr, &rem->addr, bkup); - release_sock((struct sock *)msk); + release_sock(sk); set_flags_err: - sock_put((struct sock *)msk); + sock_put(sk); return ret; }
