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=-8.7 required=3.0 tests=BAYES_00,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 9BB36C4363D for ; Fri, 2 Oct 2020 15:48:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 70BE720795 for ; Fri, 2 Oct 2020 15:48:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388130AbgJBPsZ (ORCPT ); Fri, 2 Oct 2020 11:48:25 -0400 Received: from mail-io1-f78.google.com ([209.85.166.78]:37401 "EHLO mail-io1-f78.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387948AbgJBPsU (ORCPT ); Fri, 2 Oct 2020 11:48:20 -0400 Received: by mail-io1-f78.google.com with SMTP id 80so1324964iou.4 for ; Fri, 02 Oct 2020 08:48:20 -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=mzOlMXI9XMJZP/7qb0kKcMUeHzZ5lxDcjKrpEN9c5HQ=; b=cMWGSLXvIHX/2OuyGE5Mh3PwlwDeQ4RKAJPDfqMS6W6G6OdYCHwP3fs1mh0VcDy54+ KmLZFox5os84bjLFsOWq56Uy+yMpRLzxd8MGi/ZIE33qzxplWWlXqOatuu8G8QQKrhm1 vxZlUxTaiCIk8wtKb6NF4rVvM26NmawTYKv4EyIbu3h2zYptanZSNay8qUks56ZqEMyW /ta3vUl5dab58bThdNiFO7R0Y/2LuPxUkkiw/C+9lq6GSQw0o+kGrM+uY9YnSOo8HeBx S/oiDa0MNPf4hOTvBx/nz+0uYGgEVZRkg/vyR0kAY+age8ny2k77hVRfzvOENy0osheY 8wPg== X-Gm-Message-State: AOAM530Y1RVxz1m4nk7J/TgaIm6DipaliakZKRmuRqrt2wpUW6cm0lnh ZoK2jZYYrx7wOE8qN2hhW0jU7IRKSFNLXmrulQXlf6JJ7tCc X-Google-Smtp-Source: ABdhPJzOzXL5+AqELbX95OmpDPKJssW2plxfZw/euf5AvcIpnSkTdRUzBagrmUGILRJ0Kq9abXgSu2IzVzEezpTZ1ZP7lfo82hRz MIME-Version: 1.0 X-Received: by 2002:a02:b70c:: with SMTP id g12mr2807025jam.62.1601653700165; Fri, 02 Oct 2020 08:48:20 -0700 (PDT) Date: Fri, 02 Oct 2020 08:48:20 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000da06e405b0b20f1e@google.com> Subject: WARNING in get_signal From: syzbot To: axboe@kernel.dk, christian@brauner.io, ebiederm@xmission.com, linux-kernel@vger.kernel.org, liuzhiqiang26@huawei.com, oleg@redhat.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: fcadab74 Merge tag 'drm-fixes-2020-10-01-1' of git://anong.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=116865bd900000 kernel config: https://syzkaller.appspot.com/x/.config?x=89ab6a0c48f30b49 dashboard link: https://syzkaller.appspot.com/bug?extid=3485e3773f7da290eecc compiler: gcc (GCC) 10.1.0-syz 20200507 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1211120b900000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16474c67900000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+3485e3773f7da290eecc@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: CPU: 1 PID: 6899 at kernel/signal.c:2431 do_jobctl_trap kernel/signal.c:2431 [inline] WARNING: CPU: 1 PID: 6899 at kernel/signal.c:2431 get_signal+0x1b5c/0x1f00 kernel/signal.c:2621 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 6899 Comm: syz-executor116 Not tainted 5.9.0-rc7-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+0x198/0x1fd lib/dump_stack.c:118 panic+0x382/0x7fb kernel/panic.c:231 __warn.cold+0x20/0x4b kernel/panic.c:600 report_bug+0x1bd/0x210 lib/bug.c:198 handle_bug+0x38/0x90 arch/x86/kernel/traps.c:234 exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:254 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:536 RIP: 0010:do_jobctl_trap kernel/signal.c:2431 [inline] RIP: 0010:get_signal+0x1b5c/0x1f00 kernel/signal.c:2621 Code: 00 48 c7 c2 40 da 8a 88 be d1 09 00 00 48 c7 c7 a0 da 8a 88 c6 05 09 8c 09 0a 01 e8 43 97 11 00 e9 42 f5 ff ff e8 14 78 2b 00 <0f> 0b 41 bc 00 80 00 00 e9 49 f9 ff ff 4c 89 ef e8 bf 4d 6c 00 e9 RSP: 0018:ffffc90005537ce8 EFLAGS: 00010093 RAX: 0000000000000000 RBX: 0000000100000000 RCX: ffffffff814abfc3 RDX: ffff88809315c580 RSI: ffffffff814ac67c RDI: 0000000000000005 RBP: 0000000000000000 R08: 0000000000000001 R09: ffff88809315ca0f R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000008000 R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000 arch_do_signal+0x82/0x2520 arch/x86/kernel/signal.c:811 exit_to_user_mode_loop kernel/entry/common.c:161 [inline] exit_to_user_mode_prepare+0x1ae/0x200 kernel/entry/common.c:192 syscall_exit_to_user_mode+0x7e/0x2e0 kernel/entry/common.c:267 ret_from_fork+0x15/0x30 arch/x86/entry/entry_64.S:287 RIP: 0033:0x446809 Code: e8 5c b3 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 8b 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fbb8cdd1db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: 0000000000000000 RBX: 00000000006dbc28 RCX: 0000000000446809 RDX: 9999999999999999 RSI: 0000000000000000 RDI: 000000000007a900 RBP: 00000000006dbc20 R08: ffffffffffffffff R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c R13: 00007ffeca1e9fef R14: 00007fbb8cdd29c0 R15: 20c49ba5e353f7cf Shutting down cpus with NMI Kernel Offset: disabled Rebooting in 86400 seconds.. --- 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