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 01026C07E9D for ; Mon, 26 Sep 2022 13:35:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234748AbiIZNfX (ORCPT ); Mon, 26 Sep 2022 09:35:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59538 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234533AbiIZNeW (ORCPT ); Mon, 26 Sep 2022 09:34:22 -0400 Received: from mail-qt1-f200.google.com (mail-qt1-f200.google.com [209.85.160.200]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 53FCE1DCC65 for ; Mon, 26 Sep 2022 04:56:19 -0700 (PDT) Received: by mail-qt1-f200.google.com with SMTP id v9-20020a05622a188900b0035cc030ca25so4546068qtc.1 for ; Mon, 26 Sep 2022 04:56:19 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date; bh=dIfXRWyQ7i217EgVRacoDrHCk3S/Q3VlvlvvT96zRCQ=; b=WHgCrUOnD88VvhFShtXmmPKlMW1dtYpFVhf6Mh8yvKjtJjuPleR8HscNvq5sjLoCXV z0ZTvReezqhW9fvCHFIdaoskaESIrKTRjjyMQvX6R1ejekFd/FE6MO6frZrQkBcb+G4M y4OyWed2/kKl7lbL/XMdDXrqXt9aGvC6OdVOWKuCIO/46MElsPB3QAHwCLQwI6EMVTi3 O202ow1MmIJeLTbEJTXuZ87eB9baMdq8MA6kaRgiz65Msy+nCu+vQkq/HiBkfdXsAKyJ ZV/zdMsdgwOsBC/CNNZloeU+UKuosev/xk0HyFpZcnR7ahU0tuk6PK/1kiprwXLGGWwO lpMA== X-Gm-Message-State: ACrzQf3LUSIDGMIsLJUhbVE0xaATkmoI9/DJyKEh10NgBdfwq6on/wwW NxKcMfCskE3Z1IYKpdyu0tDAhiAsi/m3/N23JNSbPLoOR8Uh X-Google-Smtp-Source: AMsMyM7rNXR6GqR0/10JkeeckFH9T+UYlBTlIOsxii7FQMkwK3v8BYDBCInZRfHQbM3JHxrLL7sSlpR6MCdQn4ysK9cBKoFcgEal MIME-Version: 1.0 X-Received: by 2002:a05:6638:d0b:b0:35a:9936:a922 with SMTP id q11-20020a0566380d0b00b0035a9936a922mr11664955jaj.169.1664192795757; Mon, 26 Sep 2022 04:46:35 -0700 (PDT) Date: Mon, 26 Sep 2022 04:46:35 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000006dd10705e99314a8@google.com> Subject: [syzbot] WARNING: lock held when returning to user space in alloc_super From: syzbot To: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk 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: f76349cf4145 Linux 6.0-rc7 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=122d6188880000 kernel config: https://syzkaller.appspot.com/x/.config?x=ba0d23aa7e1ffaf5 dashboard link: https://syzkaller.appspot.com/bug?extid=7379d1edb09dff51e4a6 compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2 Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+7379d1edb09dff51e4a6@syzkaller.appspotmail.com ================================================ WARNING: lock held when returning to user space! 6.0.0-rc7-syzkaller #0 Not tainted ------------------------------------------------ syz-executor.2/11590 is leaving the kernel with locks still held! 2 locks held by syz-executor.2/11590: #0: ffff888073cb60e0 (&type->s_umount_key#64/1){+.+.}-{3:3}, at: alloc_super+0x212/0x920 fs/super.c:228 #1: ffff88802d1df8f0 (&sb->s_type->i_lock_key#40){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:349 [inline] #1: ffff88802d1df8f0 (&sb->s_type->i_lock_key#40){+.+.}-{2:2}, at: _atomic_dec_and_lock+0x9d/0x110 lib/dec_and_lock.c:28 BUG: scheduling while atomic: syz-executor.2/11590/0x00000002 INFO: lockdep is turned off. Modules linked in: Preemption disabled at: [<0000000000000000>] 0x0 Kernel panic - not syncing: scheduling while atomic CPU: 1 PID: 11590 Comm: syz-executor.2 Not tainted 6.0.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106 panic+0x2d6/0x715 kernel/panic.c:274 __schedule_bug+0x1ff/0x250 kernel/sched/core.c:5724 schedule_debug+0x1d3/0x3c0 kernel/sched/core.c:5753 __schedule+0xfb/0xdf0 kernel/sched/core.c:6388 schedule+0xcb/0x190 kernel/sched/core.c:6570 exit_to_user_mode_loop+0xe5/0x150 kernel/entry/common.c:157 exit_to_user_mode_prepare+0xb2/0x140 kernel/entry/common.c:201 irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:307 exc_general_protection+0x298/0x430 arch/x86/kernel/traps.c:719 asm_exc_general_protection+0x22/0x30 arch/x86/include/asm/idtentry.h:564 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.