From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f71.google.com (mail-io1-f71.google.com [209.85.166.71]) (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 0F8F220C47B for ; Mon, 26 May 2025 14:53:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.71 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748271185; cv=none; b=st7EM3mhU5vn4e/73Z2iA21smFKXe5aooN/Lw9YwfT8EfFwFQgbkQ5ufHu9qb7i3TcSHxllJ6ncDU0kJ/61h11pGu79VwMp7zkuaHeLW4Pxkok7zw6zXSEMpEskqJ7GQUVihDwPQEuZe8mJGrBHsz+43fVeeBZ4UfF213KzZEa0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748271185; c=relaxed/simple; bh=rX//ZnAs4/gDdkckX/oa5gGporeBmWQngj8pvXA3luw=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=ZYKwagy9u8O2gIf0Oer8qWiqk/Or3yr0WtaMtig34c0C+opi16VVsPRTP0RJw8BjbnE1Gxwd3ylMaG7WXYh2oPskuuFA9cLhlGDikkH1/2Nr7RCZ5u6bJzvtdSdCnF3o9PrKDm/iWl++ZfdwHi4Uiybe5OrZMTvnQ59Z4RSfZPc= 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=209.85.166.71 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-f71.google.com with SMTP id ca18e2360f4ac-85e7551197bso219055739f.0 for ; Mon, 26 May 2025 07:53:03 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1748271183; x=1748875983; 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=UWjmY8aMLm+qwl1GELp08QuU0WZDXapUCNerLSYq98Y=; b=g/lvI0fBOQSVJnOHAJce+47Jq/Lol2QiBLWRAHtA1WuCrcElO8ObXghaybhlYDMhBW X6+nE6YeqdZVBqIGRNRR7ZcexAb+7JST57trAlSBQEGDt0N20EBDt3StZLo8X/PpsJt5 r6B0FkscZbem6frXBYSDG/tClUPPdyPfo5ghKlXDJZRGbJcn4xHwbJY8vXb5u3MZ+ZJL tFpaqq6KilU3Pe2lMYdh3b33IjkcerC0tcvoSZY/wVhaVXKpRWOVGwFaVuKAYXxpSZ+0 oy8cpd4ovv6M+dhBTJoT+HtdCRKtW8B01UKaAmHV9juJwdAXwQn6U8j0fS+LWalaymxe LxTQ== X-Forwarded-Encrypted: i=1; AJvYcCWMnsPmZ/PF3R5OAAC9PT9KnW90UweMO3gKV6i+x48nuT5MDrnhXqohNb1Ni4voJDYcL1QT2ZAUDba+@vger.kernel.org X-Gm-Message-State: AOJu0YxrbRgqGV8/JlHJ4ECqtVxnRnIQNbCUupXEfcUefDYpJjiCky3J oTxWCr2vxKK1N5lG5a5N40REIr9gXfhlsl5ckhhYBl71BAplr5PLHlj8Mr0NmHtoO5mE+ylLX/1 W1T78h1fl45mNbVtcXy8XoLHv9BO8v9ZH48tuTF7YFXUDatCcuTVTxtYnpIw= X-Google-Smtp-Source: AGHT+IGfFM0VmJSiEl0hrfNOjF6WtTqtIlhLZ+/eBkY7mYSTPlJ9CVCTEW3f52OL2Z0rgZuHbBmZk1JpddObrgQyRrcEkS6I69Zv Precedence: bulk X-Mailing-List: linux-ext4@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a5d:8e14:0:b0:85e:d0ca:b635 with SMTP id ca18e2360f4ac-86cadb95446mr1005245339f.2.1748271183134; Mon, 26 May 2025 07:53:03 -0700 (PDT) Date: Mon, 26 May 2025 07:53:03 -0700 In-Reply-To: <68335d8e.a70a0220.253bc2.008b.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6834804f.a70a0220.1765ec.016b.GAE@google.com> Subject: Re: [syzbot] [ext4?] KASAN: use-after-free Read in ext4_ext_insert_extent From: syzbot To: adilger.kernel@dilger.ca, akpm@linux-foundation.org, dave.hansen@linux.intel.com, linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, tytso@mit.edu Content-Type: text/plain; charset="UTF-8" syzbot has bisected this issue to: commit 665575cff098b696995ddaddf4646a4099941f5e Author: Dave Hansen Date: Fri Feb 28 20:37:22 2025 +0000 filemap: move prefaulting out of hot write path bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=14435170580000 start commit: d0c22de9995b Merge tag 'input-for-v6.15-rc7' of git://git... git tree: upstream final oops: https://syzkaller.appspot.com/x/report.txt?x=16435170580000 console output: https://syzkaller.appspot.com/x/log.txt?x=12435170580000 kernel config: https://syzkaller.appspot.com/x/.config?x=a1de0d8596cea805 dashboard link: https://syzkaller.appspot.com/bug?extid=9db318d6167044609878 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16931170580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14683ad4580000 Reported-by: syzbot+9db318d6167044609878@syzkaller.appspotmail.com Fixes: 665575cff098 ("filemap: move prefaulting out of hot write path") For information about bisection process see: https://goo.gl/tpsmEJ#bisection