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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1DF97C433EF for ; Mon, 13 Jun 2022 00:16:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238000AbiFMAQ0 (ORCPT ); Sun, 12 Jun 2022 20:16:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58946 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229977AbiFMAQW (ORCPT ); Sun, 12 Jun 2022 20:16:22 -0400 Received: from mail-io1-f69.google.com (mail-io1-f69.google.com [209.85.166.69]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A61633AA66 for ; Sun, 12 Jun 2022 17:16:20 -0700 (PDT) Received: by mail-io1-f69.google.com with SMTP id j12-20020a5d93cc000000b006692aee869fso1900255ioo.5 for ; Sun, 12 Jun 2022 17:16:20 -0700 (PDT) X-Google-DKIM-Signature: v=1; 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charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org syzbot has found a reproducer for the following issue on: HEAD commit: 6d0c80680317 Add linux-next specific files for 20220610 git tree: linux-next console+strace: https://syzkaller.appspot.com/x/log.txt?x=106611bff00000 kernel config: https://syzkaller.appspot.com/x/.config?x=a30d6e3e814e5931 dashboard link: https://syzkaller.appspot.com/bug?extid=9bb26e7c5e8e4fa7e641 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=177b6230080000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=148207bff00000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+9bb26e7c5e8e4fa7e641@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: CPU: 1 PID: 4198 at kernel/rcu/tasks.h:1664 exit_tasks_rcu_finish_trace kernel/rcu/tasks.h:1664 [inline] WARNING: CPU: 1 PID: 4198 at kernel/rcu/tasks.h:1664 exit_tasks_rcu_finish+0x122/0x1b0 kernel/rcu/tasks.h:1006 Modules linked in: CPU: 1 PID: 4198 Comm: syz-executor403 Not tainted 5.19.0-rc1-next-20220610-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:exit_tasks_rcu_finish_trace kernel/rcu/tasks.h:1664 [inline] RIP: 0010:exit_tasks_rcu_finish+0x122/0x1b0 kernel/rcu/tasks.h:1006 Code: fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 48 89 fa 83 e2 07 38 d0 7f 04 84 c0 75 62 0f b6 85 89 04 00 00 83 e0 01 08 d8 74 0e <0f> 0b 5b 48 89 ef 5d 41 5c e9 00 d2 ff ff 48 b8 00 00 00 00 00 fc RSP: 0018:ffffc90003a2fb58 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000201 RCX: 1ffff1100ebf1091 RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff888075f88489 RBP: ffff888075f88000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888075f88480 R13: dffffc0000000000 R14: ffff888075f88000 R15: ffffc90003a2fbe8 FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555556d916d0 CR3: 000000000ba8e000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: do_exit+0x18f2/0x2a00 kernel/exit.c:844 do_group_exit+0xd2/0x2f0 kernel/exit.c:925 get_signal+0x2542/0x2600 kernel/signal.c:2857 arch_do_signal_or_restart+0x82/0x2300 arch/x86/kernel/signal.c:869 exit_to_user_mode_loop kernel/entry/common.c:166 [inline] exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x46/0xb0 RIP: 0033:0x7fb21689cc79 Code: Unable to access opcode bytes at RIP 0x7fb21689cc4f. RSP: 002b:00007fb21684d218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007fb216924408 RCX: 00007fb21689cc79 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fb216924408 RBP: 00007fb216924400 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fb21692440c R13: 00007ffe134b471f R14: 00007fb21684d300 R15: 0000000000022000