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 A82B1218827 for ; Mon, 8 Sep 2025 04:30:03 +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=1757305805; cv=none; b=JV+1D5jce3D2AJGjgTvVDyPDJPVsoRlu5OTZaN/MUgc0oHV+fcINCBvNhMW8AnZF+fgYELfmfe5I7YbTYF9ZZpy4Z39Bc4ciU+L1yzFRqBQfysn+FVkXCBGL9sZBASCLvVbyObbD4zMLjrR+dU+1Hiyuc6Eu7xYI4Pey5kJCZ7k= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757305805; c=relaxed/simple; bh=4zkgAfJ47wYvARL/HU5hwdAls1pAwTkHezvtoue9GJc=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=SGa2aFlP17uqA0LDv6YRprmH7HwGMaABRPuRUVDx8uJsR3znNDVduh6gE7G+a+5jAbF0+9OU6NT7aNcZoEb8JhCZjvKIW4kHUM5wHa6PlI1mYKoByHOPEp4LVksJgqXBddRZQtbsjqJm+7dC7TNIIDQ/pNSxdksDucLTxADUVyE= 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-889b8d8b6b7so74914639f.1 for ; Sun, 07 Sep 2025 21:30:03 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1757305803; x=1757910603; 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=iKg/g/XoJErvdToiWX/Q27vZTqTfinN/J6yC7CugODI=; b=JnThnQb5m8YECajk2vLKEzCCHjDhemrrhBM0TuzSLPdyCHsuD6S3BGKPdvuMRIlHye udn6lG8PbLbaAFFZRKmS4ByKpEXINU45v0g4x3GmrwLDAM/Q13mnyAvquRFhL8EGkK9+ guBcRvW5BIDpAl3ZU4QWowlk311yvN125DkU6mgHpQahMpPI7ac1TMSAlPfdnP5+rtor XCmtPB7vthGGNYj4GGd+D9Pw0HT4s8wVMPNQToI8FJ4bLaEcNApMLMT5zdc6wqxZgRXG XDhOotDHAv6W9BtuKa1l+ocI1T1y2VOxgf4ZHq20UWKz1EYAU46UHaFx4HAsq165XVLb k4GQ== X-Forwarded-Encrypted: i=1; AJvYcCX7yMffucqUe82uFdWlz762u4S9LWeWco3U0fbTHRY3je8RidOAFtQl0P7QQ989+Uq3YYvIGSm6s+EoSmw=@vger.kernel.org X-Gm-Message-State: AOJu0YydqWKb5n9ru2gDffZRqBLJMuA44U91JsFPb+OzRb6Sk2ffHQE0 Kb/VKTkHWVdm3lxExrBhWb0ZtYjpUqr8Et0A2EtGioqkP8x8CXZiPj8yHcjiH/lUvzZj/nfDKBC LrVcTi/l4MkiWLxxxgIEF0qF4EGW3dl7MTV8rX8pvcaUxxN6e1rTpFxfBdZM= X-Google-Smtp-Source: AGHT+IGPKdo6XGzXWRxs8GK3AjURBkNRBzmNdwt1tAD0uRVr1AmOZCv3S4NUzRIjrDq90pmE/Ak2fuHxXW+LtPKeKZplQof/1f3p Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a92:cd88:0:b0:3f3:cd20:d7e4 with SMTP id e9e14a558f8ab-3fdfaf2e158mr94576065ab.1.1757305802594; Sun, 07 Sep 2025 21:30:02 -0700 (PDT) Date: Sun, 07 Sep 2025 21:30:02 -0700 In-Reply-To: <68b9b200.a00a0220.eb3d.0006.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <68be5bca.050a0220.192772.0831.GAE@google.com> Subject: Re: [syzbot] [io-uring?] KASAN: null-ptr-deref Read in io_sqe_buffer_register From: syzbot To: akpm@linux-foundation.org, axboe@kernel.dk, david@redhat.com, io-uring@vger.kernel.org, jgg@ziepe.ca, jhubbard@nvidia.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, peterx@redhat.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" syzbot has bisected this issue to: commit da6b34293ff8dbb78f8b9278c9a492925bbf1f87 Author: David Hildenbrand Date: Mon Sep 1 15:03:40 2025 +0000 mm/gup: remove record_subpages() bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1240f962580000 start commit: 4ac65880ebca Add linux-next specific files for 20250904 git tree: linux-next final oops: https://syzkaller.appspot.com/x/report.txt?x=1140f962580000 console output: https://syzkaller.appspot.com/x/log.txt?x=1640f962580000 kernel config: https://syzkaller.appspot.com/x/.config?x=fbc16d9faf3a88a4 dashboard link: https://syzkaller.appspot.com/bug?extid=1ab243d3eebb2aabf4a4 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12a0e312580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=101e3e62580000 Reported-by: syzbot+1ab243d3eebb2aabf4a4@syzkaller.appspotmail.com Fixes: da6b34293ff8 ("mm/gup: remove record_subpages()") For information about bisection process see: https://goo.gl/tpsmEJ#bisection