From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D9C70C18E5A for ; Tue, 10 Mar 2020 16:05:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BCFA621D56 for ; Tue, 10 Mar 2020 16:05:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726822AbgCJQFK (ORCPT ); Tue, 10 Mar 2020 12:05:10 -0400 Received: from mail-il1-f199.google.com ([209.85.166.199]:36746 "EHLO mail-il1-f199.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726514AbgCJQFK (ORCPT ); Tue, 10 Mar 2020 12:05:10 -0400 Received: by mail-il1-f199.google.com with SMTP id v14so10220298ilq.3 for ; Tue, 10 Mar 2020 09:05:09 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=2tittrVpC8GmJL2+XcQBR4qTl4luAaKYdn6TyydRc6g=; b=YYmr7qPBLJmsBW55Z2f82Xy8PiUYuv0k83PcjOQe2fhLI0w5FSRYubsoWVaHiGX8uR jLASmDzDtpGa0iFpjQVSvUgHdcAPyrEuxBx7MORjv6oSRS39ciw3pkkcbq34Bam2GpPB 1dLqBc7RT+Jl6qxbNc8SxcZIi/1T6xKKUu0ZR3jr525MqNzPYKmWDNtq2RMTFcGdiIFp F2s90zXtDrUSliikZPP81jbKxgpDus9JSNxUfpaPO5slwEAVHISsLTm1rsLGV+uqMLjK Q4AebeO3XqvI36H3k8Ecq57zRStB6+rxmCV1J87uoPMRx9t6yOvUjop2BMzyZiK6RfbV b5EA== X-Gm-Message-State: ANhLgQ3cnOah0m6TB35QvOQZQcgi+aDlHr8UowFDNgJIOwOPkWRBm694 /kF693sp/Q4lFuHUXxcj+JycLXtSjeWzDDsKhRvMKBp3LSDv X-Google-Smtp-Source: ADFU+vvalPW8+C0hK5qjtHfHmng8Gm6maxgOCCp1Ire8CqVz0g6gRZq31tr6L1PJ4yBkiPEqRIwYqqgSwz0Y7c89u8eVX/ScwsKR MIME-Version: 1.0 X-Received: by 2002:a92:4e:: with SMTP id 75mr20512712ila.276.1583856309487; Tue, 10 Mar 2020 09:05:09 -0700 (PDT) Date: Tue, 10 Mar 2020 09:05:09 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000b3cfc805a0824881@google.com> Subject: WARNING in call_rcu From: syzbot To: davem@davemloft.net, jhs@mojatatu.com, jiri@resnulli.us, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com, xiyou.wangcong@gmail.com Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: 63623fd4 Merge tag 'for-linus' of git://git.kernel.org/pub.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=17039f29e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=5d2e033af114153f dashboard link: https://syzkaller.appspot.com/bug?extid=2f8c233f131943d6056d compiler: clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=117bdfa1e00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1472e1fde00000 Bisection is inconclusive: the bug happens on the oldest tested release. bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=155b9f29e00000 final crash: https://syzkaller.appspot.com/x/report.txt?x=175b9f29e00000 console output: https://syzkaller.appspot.com/x/log.txt?x=135b9f29e00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+2f8c233f131943d6056d@syzkaller.appspotmail.com ------------[ cut here ]------------ ODEBUG: activate active (active state 1) object type: rcu_head hint: 0x0 WARNING: CPU: 1 PID: 8979 at lib/debugobjects.c:488 debug_print_object lib/debugobjects.c:485 [inline] WARNING: CPU: 1 PID: 8979 at lib/debugobjects.c:488 debug_object_activate+0x5a8/0x6f0 lib/debugobjects.c:652 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 8979 Comm: syz-executor219 Not tainted 5.6.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fb/0x318 lib/dump_stack.c:118 panic+0x264/0x7a9 kernel/panic.c:221 __warn+0x209/0x210 kernel/panic.c:582 report_bug+0x1b6/0x2f0 lib/bug.c:195 fixup_bug arch/x86/kernel/traps.c:174 [inline] do_error_trap+0xcf/0x1c0 arch/x86/kernel/traps.c:267 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:286 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027 RIP: 0010:debug_print_object lib/debugobjects.c:485 [inline] RIP: 0010:debug_object_activate+0x5a8/0x6f0 lib/debugobjects.c:652 Code: 74 08 4c 89 f7 e8 d8 43 0f fe 4d 8b 06 48 c7 c7 13 ec f0 88 48 c7 c6 04 4f 06 89 4c 89 ea 89 d9 4d 89 e1 31 c0 e8 08 e0 a3 fd <0f> 0b 48 ba 00 00 00 00 00 fc ff df ff 05 da eb c4 05 48 8b 5d b8 RSP: 0018:ffffc900020f73a8 EFLAGS: 00010246 RAX: eb30c415fdb00600 RBX: 0000000000000001 RCX: ffff888095774280 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: ffffc900020f73f0 R08: ffffffff81601324 R09: ffffed1015d66618 R10: ffffed1015d66618 R11: 0000000000000000 R12: 0000000000000000 R13: ffffffff88f4c97a R14: ffffffff892d99a8 R15: ffff88809f5ecc98 debug_rcu_head_queue kernel/rcu/rcu.h:176 [inline] __call_rcu kernel/rcu/tree.c:2597 [inline] call_rcu+0x3a/0x660 kernel/rcu/tree.c:2683 queue_rcu_work+0x79/0x90 kernel/workqueue.c:1742 tcf_queue_work+0xc9/0xe0 net/sched/cls_api.c:206 route4_change+0x18e8/0x1d90 net/sched/cls_route.c:550 tc_new_tfilter+0x1490/0x2f50 net/sched/cls_api.c:2103 rtnetlink_rcv_msg+0x8fb/0xd40 net/core/rtnetlink.c:5427 netlink_rcv_skb+0x19e/0x3e0 net/netlink/af_netlink.c:2478 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:5454 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0x766/0x920 net/netlink/af_netlink.c:1329 netlink_sendmsg+0xa2b/0xd40 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] ____sys_sendmsg+0x4f7/0x7f0 net/socket.c:2343 ___sys_sendmsg net/socket.c:2397 [inline] __sys_sendmsg+0x1ed/0x290 net/socket.c:2430 __do_sys_sendmsg net/socket.c:2439 [inline] __se_sys_sendmsg net/socket.c:2437 [inline] __x64_sys_sendmsg+0x7f/0x90 net/socket.c:2437 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x446709 Code: e8 1c ba 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 ab 0e fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f823766ed98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00000000006dbc68 RCX: 0000000000446709 RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000003 RBP: 00000000006dbc60 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc6c R13: 0000000000000005 R14: 00a3a20740000000 R15: 0507002400000038 Kernel Offset: disabled Rebooting in 86400 seconds.. --- This bug is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches