From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965804AbeEIRDF (ORCPT ); Wed, 9 May 2018 13:03:05 -0400 Received: from mail-it0-f71.google.com ([209.85.214.71]:59927 "EHLO mail-it0-f71.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965716AbeEIRDC (ORCPT ); Wed, 9 May 2018 13:03:02 -0400 X-Google-Smtp-Source: AB8JxZq4tMO4D+Cmre0FB7Bdz3XL/TL+A9vGAK+lz/9sr2OqfL9aPVttv7+OJ3EjkA55p3qteUsgYPvJEdwuQEhijKgUz+huwR6s MIME-Version: 1.0 Date: Wed, 09 May 2018 10:03:01 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000027f6f6056bc8e0f8@google.com> Subject: WARNING: suspicious RCU usage in corrupted From: syzbot To: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: 036db8bd9637 Merge branch 'for-4.17-fixes' of git://git.ke.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14d187e7800000 kernel config: https://syzkaller.appspot.com/x/.config?x=31f4b3733894ef79 dashboard link: https://syzkaller.appspot.com/bug?extid=5cec30d9329f61f2fb29 compiler: gcc (GCC) 8.0.1 20180413 (experimental) userspace arch: i386 syzkaller repro:https://syzkaller.appspot.com/x/repro.syz?x=1110de07800000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+5cec30d9329f61f2fb29@syzkaller.appspotmail.com random: sshd: uninitialized urandom read (32 bytes read) random: sshd: uninitialized urandom read (32 bytes read) IPVS: ftp: loaded support on port[0] = 21 ============================= WARNING: suspicious RCU usage 4.17.0-rc4+ #64 Not tainted ----------------------------- arch/x86/kernel/traps.c:537 entry code didn't wake RCU! other info that might help us debug this: RCU used illegally from idle CPU! rcu_scheduler_active = 2, debug_locks = 1 RCU used illegally from extended quiescent state! no locks held by swapper/0/0. stack backtrace: --- 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. If you forgot to add the Reported-by tag, once the fix for this bug is merged into any tree, please reply to this email with: #syz fix: exact-commit-title If you want to test a patch for this bug, please reply with: #syz test: git://repo/address.git branch and provide the patch inline or as an attachment. To mark this as a duplicate of another syzbot report, please reply with: #syz dup: exact-subject-of-another-report If it's a one-off invalid bug report, please reply with: #syz invalid Note: if the crash happens again, it will cause creation of a new bug report. Note: all commands must start from beginning of the line in the email body.