From: Dan Carpenter <dan.carpenter@oracle.com>
To: kbuild@lists.01.org, Paolo Abeni <pabeni@redhat.com>,
mptcp@lists.linux.dev
Cc: lkp@intel.com, kbuild-all@lists.01.org
Subject: Re: [PATCH v2 mptcp-next 5/8] mptcp: faster active backup recovery
Date: Wed, 14 Jul 2021 11:36:23 +0300 [thread overview]
Message-ID: <202107141117.6wB0621n-lkp@intel.com> (raw)
In-Reply-To: <3f5c7f52467c1bee161388688305b8911aaa8d8a.1626210682.git.pabeni@redhat.com>
Hi Paolo,
url: https://github.com/0day-ci/linux/commits/Paolo-Abeni/mptcp-refactor-active-backup/20210714-051541
base: https://github.com/multipath-tcp/mptcp_net-next.git export
config: x86_64-randconfig-m001-20210713 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
New smatch warnings:
net/mptcp/pm_netlink.c:931 mptcp_pm_nl_subflow_chk_stale() error: uninitialized symbol 'push'.
vim +/push +931 net/mptcp/pm_netlink.c
bc57ec20ec19b4d Paolo Abeni 2021-07-13 904 void mptcp_pm_nl_subflow_chk_stale(const struct mptcp_sock *msk, struct sock *ssk)
bc57ec20ec19b4d Paolo Abeni 2021-07-13 905 {
bc57ec20ec19b4d Paolo Abeni 2021-07-13 906 struct mptcp_subflow_context *iter, *subflow = mptcp_subflow_ctx(ssk);
bc57ec20ec19b4d Paolo Abeni 2021-07-13 907 struct sock *sk = (struct sock *)msk;
bc57ec20ec19b4d Paolo Abeni 2021-07-13 908 unsigned int active_max_loss_cnt;
bc57ec20ec19b4d Paolo Abeni 2021-07-13 909 struct net *net = sock_net(sk);
bc57ec20ec19b4d Paolo Abeni 2021-07-13 910 unsigned int stale_loss_cnt;
bc57ec20ec19b4d Paolo Abeni 2021-07-13 911 bool slow, push;
bc57ec20ec19b4d Paolo Abeni 2021-07-13 912
bc57ec20ec19b4d Paolo Abeni 2021-07-13 913 stale_loss_cnt = mptcp_stale_loss_cnt(net);
bc57ec20ec19b4d Paolo Abeni 2021-07-13 914 if (subflow->stale || !stale_loss_cnt || subflow->stale_count <= stale_loss_cnt)
bc57ec20ec19b4d Paolo Abeni 2021-07-13 915 return;
bc57ec20ec19b4d Paolo Abeni 2021-07-13 916
bc57ec20ec19b4d Paolo Abeni 2021-07-13 917 /* look for another available subflow not in loss state */
bc57ec20ec19b4d Paolo Abeni 2021-07-13 918 active_max_loss_cnt = max_t(int, stale_loss_cnt - 1, 1);
bc57ec20ec19b4d Paolo Abeni 2021-07-13 919 mptcp_for_each_subflow(msk, iter) {
bc57ec20ec19b4d Paolo Abeni 2021-07-13 920 if (iter != subflow && mptcp_subflow_active(iter) &&
bc57ec20ec19b4d Paolo Abeni 2021-07-13 921 iter->stale_count < active_max_loss_cnt) {
bc57ec20ec19b4d Paolo Abeni 2021-07-13 922 /* we have some alteratives, try to mark this subflow as idle ...*/
bc57ec20ec19b4d Paolo Abeni 2021-07-13 923 slow = lock_sock_fast(ssk);
bc57ec20ec19b4d Paolo Abeni 2021-07-13 924 if (!tcp_rtx_and_write_queues_empty(ssk)) {
bc57ec20ec19b4d Paolo Abeni 2021-07-13 925 subflow->stale = 1;
bc57ec20ec19b4d Paolo Abeni 2021-07-13 926 push = __mptcp_retransmit_pending_data(sk);
bc57ec20ec19b4d Paolo Abeni 2021-07-13 927 }
"push" uninitialized on else path.
bc57ec20ec19b4d Paolo Abeni 2021-07-13 928 unlock_sock_fast(ssk, slow);
bc57ec20ec19b4d Paolo Abeni 2021-07-13 929
bc57ec20ec19b4d Paolo Abeni 2021-07-13 930 /* pending data on the idle subflow: retransmit */
bc57ec20ec19b4d Paolo Abeni 2021-07-13 @931 if (push)
bc57ec20ec19b4d Paolo Abeni 2021-07-13 932 __mptcp_push_pending(sk, 0);
bc57ec20ec19b4d Paolo Abeni 2021-07-13 933 return;
bc57ec20ec19b4d Paolo Abeni 2021-07-13 934 }
bc57ec20ec19b4d Paolo Abeni 2021-07-13 935 }
bc57ec20ec19b4d Paolo Abeni 2021-07-13 936 }
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
next prev parent reply other threads:[~2021-07-14 9:26 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-13 21:13 [PATCH v2 mptcp-next 0/8] mptcp: refactor active backup Paolo Abeni
2021-07-13 21:13 ` [PATCH v2 mptcp-next 1/8] mptcp: more accurate timeout Paolo Abeni
2021-07-13 21:13 ` [PATCH v2 mptcp-next 2/8] mptcp: less aggressive retransmission stragegy Paolo Abeni
2021-07-13 21:13 ` [PATCH v2 mptcp-next 3/8] mptcp: handle pending data on closed subflow Paolo Abeni
2021-07-13 21:13 ` [PATCH v2 mptcp-next 4/8] mptcp: cleanup sysctl data and helpers Paolo Abeni
2021-07-13 21:13 ` [PATCH v2 mptcp-next 5/8] mptcp: faster active backup recovery Paolo Abeni
2021-07-14 0:46 ` kernel test robot
2021-07-14 8:36 ` Dan Carpenter [this message]
2021-07-14 10:15 ` Matthieu Baerts
2021-07-13 21:13 ` [PATCH v2 mptcp-next 6/8] mptcp: add mibs for stale subflows processing Paolo Abeni
2021-07-13 21:13 ` [PATCH v2 mptcp-next 7/8] mptcp: backup flag from incoming MPJ ack option Paolo Abeni
2021-07-13 21:13 ` [PATCH v2 mptcp-next 8/8] selftests: mptcp: add testcase for active-back Paolo Abeni
2021-07-15 1:20 ` [PATCH v2 mptcp-next 0/8] mptcp: refactor active backup Mat Martineau
2021-07-16 10:01 ` Matthieu Baerts
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