From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f70.google.com (mail-io1-f70.google.com [209.85.166.70]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 75A571272A0 for ; Wed, 8 May 2024 15:13:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.70 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715181185; cv=none; b=WyCpOprQanjkmKvcQ2uKgyUfE6N+8cqZGt+FjLEL2i/7aflakcKP5alwMrIc5kSPuwWAxQDH+LJWVhr2aVdbdVLyJkiX9sxQcINjUzgKH62i4++uwESyBdHYjyafBxhJk0RgtV6DlxCMK/VTH9gDUvvqlHpzvrEQ5TtVEkGM1so= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715181185; c=relaxed/simple; bh=VTooLKM1UWVTk8gSGQDqgDwStVWBUyMdaRzHq8tOcbs=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=L5oqXMtLDCz/mROLTfwZkJGUJ4KC4uULoPRkw7b5sSOo0pGH/nQqLd1OtSsMhFhy6tTTqzLNb61es/pkGXuU5cTU/ascxwoS43arIpif1vTKtBbpL5IrMOhVT8bcGwETcj8bIDcioTH798s5aK8ljAWqiMDu5zFgKA4lV08KIaM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.166.70 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-io1-f70.google.com with SMTP id ca18e2360f4ac-7dec4e29827so463929539f.2 for ; Wed, 08 May 2024 08:13:04 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1715181183; x=1715785983; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=AEBdO5/t3gWQndQoUbCFMwd1dlzvgeFuNRoAmahB4YQ=; b=DHlgbOsFCZOApy+/V9Eyg5XxVkxUxSSuhIjRq+r4BfgxWw4yjp6LQFTT/+NEGWNMUC ujFeghQ53t9o6SH47wZDN0iGaNaeV3mqHy2a0m7WmaozXdFGCiNBOu75gdHQUVE5wdZp fXP+bhBncNqSGjPA1oyVRFCQIZSp7qx39FNAiAQNSwx7enhCMNq6vchnd3Msfwb3W8Np 62Zr2xC8CngsH6P6x7CTiCaVuFgnAYXf/qdGA+DoxJB7kIjXibxad4wVpIGkflOMw4vm YvKZWXrnAtvttm/oXsHCLGy9El6ZxN18t6TYkrObilTzQh2ZRigPqUDs8ZmGfoNIsKXw Cgkg== X-Forwarded-Encrypted: i=1; AJvYcCXds+lgV+kESP4quwIhHCXRqZZ3ur6uVzqYSuPGyI92jhQjPJB8fpgiPSnVnIv2sIyOnAtupIkf067OezWMLqkNw8Y7wNEYGOPU9lCf X-Gm-Message-State: AOJu0YyPTcC/8tAaiLcT/+K6z4ob1JB30VCbhWk+UCMR1H0o6qwX/R9a fwoIucuiJ2QT+5qMK070KzmwMAS90rv4PfAC6Vhwgbi/heCHW8x96iN0AsamrIpS/2mxmshuFm/ Erudaz+DQEOrctMt6JBsTDVkxoNXGUupy8/9cx4mgt6SpjELG7SsYrOk= X-Google-Smtp-Source: AGHT+IEgJOu5ZVCCFED8YRbF5GZ6UCcgUorZLjp//7D8s5IUYcamXViyuOmXvu9So1WH93R5xeRN4nyaq37WLksFXyCFnIm9g7Cb Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6638:8325:b0:488:ac5a:7fe9 with SMTP id 8926c6da1cb9f-488fdd777e4mr155178173.4.1715181183643; Wed, 08 May 2024 08:13:03 -0700 (PDT) Date: Wed, 08 May 2024 08:13:03 -0700 In-Reply-To: <0000000000006399c80617120daa@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000002d41840617f2bd39@google.com> Subject: Re: [syzbot] [kernfs?] possible deadlock in kernfs_seq_start From: syzbot To: axboe@kernel.dk, gregkh@linuxfoundation.org, hch@lst.de, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu, rafael@kernel.org, syzkaller-bugs@googlegroups.com, tj@kernel.org Content-Type: text/plain; charset="UTF-8" syzbot has bisected this issue to: commit 1e8c813b083c4122dfeaa5c3b11028331026e85d Author: Christoph Hellwig Date: Wed May 31 12:55:32 2023 +0000 PM: hibernate: don't use early_lookup_bdev in resume_store bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1380072f180000 start commit: dccb07f2914c Merge tag 'for-6.9-rc7-tag' of git://git.kern.. git tree: upstream final oops: https://syzkaller.appspot.com/x/report.txt?x=1040072f180000 console output: https://syzkaller.appspot.com/x/log.txt?x=1780072f180000 kernel config: https://syzkaller.appspot.com/x/.config?x=9d7ea7de0cb32587 dashboard link: https://syzkaller.appspot.com/bug?extid=4c493dcd5a68168a94b2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1134f3c0980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1367a504980000 Reported-by: syzbot+4c493dcd5a68168a94b2@syzkaller.appspotmail.com Fixes: 1e8c813b083c ("PM: hibernate: don't use early_lookup_bdev in resume_store") For information about bisection process see: https://goo.gl/tpsmEJ#bisection