From mboxrd@z Thu Jan 1 00:00:00 1970 From: Roman Makhov Subject: Kernel panic on kernel-3.10.0-693.21.1.el7 in ndisc.h Date: Sun, 13 May 2018 14:35:07 +0300 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" To: linux-wpan@vger.kernel.org, netdev@vger.kernel.org Return-path: Received: from mail-qt0-f173.google.com ([209.85.216.173]:34149 "EHLO mail-qt0-f173.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750949AbeEMLfI (ORCPT ); Sun, 13 May 2018 07:35:08 -0400 Sender: netdev-owner@vger.kernel.org List-ID: Hello, We have a problem with Kernel panic after upgrade from CentOS 7.3 (kernel-3.10.0-514.el7) to CentOS 7.4 (kernel-3.10.0-693.21.1.el7). It occurs when we have the incoming traffic from other nodes and we are performing the re-configuration of IPv6 interfaces. It is high-availability system without 802.15.4 support. The log of crash: ========================================================= #10 [ffff88043fc03cf0] async_page_fault at ffffffff816b7798 [exception RIP: ndisc_send_rs+238] RIP: ffffffff8166575e RSP: ffff88043fc03da8 RFLAGS: 00010202 RAX: 0000000000000002 RBX: ffff88042caa9000 RCX: 0000000000000001 RDX: 0000000000000000 RSI: 0000000000000200 RDI: ffffffff816534f7 RBP: ffff88043fc03dd0 R8: 0000000000000000 R9: ffffffff81e9f1c0 R10: 0000000000000002 R11: ffff88043fc03da8 R12: 0000000000000008 R13: 0000000000000006 R14: ffff88043fc03de0 R15: ffffffff81772410 ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018 #11 [ffff88043fc03da0] ndisc_send_rs at ffffffff81665704 ========================================================= I see that crash points on ndisc.h, it is ndisc_ops_opt_addr_space() in function: ========================================================= crash> kmem ffffffff8166575e ffffffff8166575e (T) ndisc_send_rs+238 /usr/src/debug/kernel-3.10.0-693.21.1.el7/linux-3.10.0-693.21.1.el7.x86_64/include/net/ndisc.h: 251 PAGE PHYSICAL MAPPING INDEX CNT FLAGS ffffea0000059940 1665000 0 0 1 1fffff00000400 reserved crash> ========================================================= I checked the difference between 514 and 693 kernels is in the patch https://patchwork.kernel.org/patch/9179229/ . Any suggesions about what I am doing wrong are welcome. Thanks! Roman Makhov