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=-3.7 required=3.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no 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 83C99C433F5 for ; Sun, 12 Sep 2021 19:22:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 61A6461051 for ; Sun, 12 Sep 2021 19:22:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235785AbhILTXj (ORCPT ); Sun, 12 Sep 2021 15:23:39 -0400 Received: from mail-il1-f197.google.com ([209.85.166.197]:40621 "EHLO mail-il1-f197.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234625AbhILTXj 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MIME-Version: 1.0 X-Received: by 2002:a92:cb12:: with SMTP id s18mr5224646ilo.32.1631474544736; Sun, 12 Sep 2021 12:22:24 -0700 (PDT) Date: Sun, 12 Sep 2021 12:22:24 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000b2fdbc05cbd144b7@google.com> Subject: [syzbot] INFO: task hung in cangw_pernet_exit (3) From: syzbot To: davem@davemloft.net, kuba@kernel.org, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-can@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: 999569d59a0a Add linux-next specific files for 20210908 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=17c68851300000 kernel config: https://syzkaller.appspot.com/x/.config?x=7ad035460e67a9c3 dashboard link: https://syzkaller.appspot.com/bug?extid=c46e2a20b7d78a4e5c6a compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.1 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1653aab5300000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+c46e2a20b7d78a4e5c6a@syzkaller.appspotmail.com INFO: task syz-executor.1:8622 can't die for more than 143 seconds. task:syz-executor.1 state:D stack:25536 pid: 8622 ppid: 6556 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:4955 [inline] __schedule+0x940/0x26f0 kernel/sched/core.c:6302 schedule+0xd3/0x270 kernel/sched/core.c:6381 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6440 __mutex_lock_common kernel/locking/mutex.c:669 [inline] __mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729 cangw_pernet_exit+0xe/0x20 net/can/gw.c:1244 ops_exit_list+0xb0/0x160 net/core/net_namespace.c:168 setup_net+0x639/0xa30 net/core/net_namespace.c:349 copy_net_ns+0x319/0x760 net/core/net_namespace.c:470 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0xc1/0x1f0 kernel/nsproxy.c:226 ksys_unshare+0x445/0x920 kernel/fork.c:3127 __do_sys_unshare kernel/fork.c:3201 [inline] __se_sys_unshare kernel/fork.c:3199 [inline] __x64_sys_unshare+0x2d/0x40 kernel/fork.c:3199 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665f9 RSP: 002b:00007fdd1cebc188 EFLAGS: 00000246 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665f9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffe22423e0f R14: 00007fdd1cebc300 R15: 0000000000022000 INFO: task syz-executor.2:8795 can't die for more than 146 seconds. task:syz-executor.2 state:D stack:25208 pid: 8795 ppid: 6559 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:4955 [inline] __schedule+0x940/0x26f0 kernel/sched/core.c:6302 schedule+0xd3/0x270 kernel/sched/core.c:6381 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6440 __mutex_lock_common kernel/locking/mutex.c:669 [inline] __mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729 cangw_pernet_exit+0xe/0x20 net/can/gw.c:1244 ops_exit_list+0xb0/0x160 net/core/net_namespace.c:168 setup_net+0x639/0xa30 net/core/net_namespace.c:349 copy_net_ns+0x319/0x760 net/core/net_namespace.c:470 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0xc1/0x1f0 kernel/nsproxy.c:226 ksys_unshare+0x445/0x920 kernel/fork.c:3127 __do_sys_unshare kernel/fork.c:3201 [inline] __se_sys_unshare kernel/fork.c:3199 [inline] __x64_sys_unshare+0x2d/0x40 kernel/fork.c:3199 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665f9 RSP: 002b:00007f42a74e7188 EFLAGS: 00000246 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665f9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffe2b27af6f R14: 00007f42a74e7300 R15: 0000000000022000 INFO: task syz-executor.5:8889 can't die for more than 148 seconds. task:syz-executor.5 state:R running task stack:25288 pid: 8889 ppid: 6557 flags:0x00004006 Call Trace: INFO: task syz-executor.3:8988 can't die for more than 151 seconds. task:syz-executor.3 state:R running task stack:25760 pid: 8988 ppid: 6554 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:4955 [inline] __schedule+0x940/0x26f0 kernel/sched/core.c:6302 preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:6702 irqentry_exit+0x31/0x80 kernel/entry/common.c:427 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0000:0x0 Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6. RSP: d5a7ae8:0000000000000000 EFLAGS: 00000046 ORIG_RAX: 0000000000000001 RAX: dffffc0000000000 RBX: 1ffff92001ab4f58 RCX: f4d672f5b9097ca7 RDX: ffffffff8d6e3a57 RSI: 0000000000000000 RDI: 0000000000000001 RBP: ffffed1003aa4390 R08: 0000000000000001 R09: ffffffff8fcfa92f R10: dffffc0000000000 R11: 0000000000000002 R12: ffff88801d521c80 R13: 64a21813a00bdf00 R14: ffffed1017386541 R15: 0000000000000000 --- This report 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 issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches