From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oa1-f72.google.com (mail-oa1-f72.google.com [209.85.160.72]) (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 7C401289E13 for ; Wed, 2 Sep 2026 20:11:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.160.72 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788379914; cv=none; b=Iy65NGTQu+aOiTfbiRlnjfRqiIycCvKChwKmZ3fAt+4xXjF/zhr88qAGiKykc2b2MBbaukybDI/GMpAlaQKbGBZaIm+Plr/CeHxfrPkBPXRh4YIrdAP4ruhmGFlPQLUH36+wt15ci++HOypQ6zSL0gfI9taryMdUD51SiuCLcMk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788379914; c=relaxed/simple; bh=o5BmhHDfnw4iwrf8K9gkgfQD2kj3FWkXvYaXnpyVv+s=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=SZSEAmXDd/+DOonuEkEI2PYDk/e70gmsXEuLR/KhzgVg3e8zJ1XpC1ctGbeWN++x8b73PHe0DLALeLGNXegklMZ5uh7ombJM+ukxv8FBWoCw/VVEb4iqSJUiNadF7FGjxqkclBmli+IDpT6dE7giIOK5z2RWqKsMUusD1OWxQ8g= 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=209.85.160.72 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-oa1-f72.google.com with SMTP id 586e51a60fabf-46f178d813bso1504093fac.3 for ; Wed, 02 Sep 2026 13:11:52 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1788379911; x=1788984711; h=content-type:to:from:subject:message-id:in-reply-to:date :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to:content-type; bh=rRDQJDr7g3YarYzKUbvtv2aPQ8VmIq45ubT2JPVUTtA=; b=HIoLPSiU6uN86ROCbG4UL4hQYG02AR0Zg549w8OYttlE9geX1rvKS0PPw09Vv8I+nD i2gZVWoHeRIUpHP0H8AkHKrjCwng2PMneicTblc0X/DJa7rqlfwOXc1IyMEgq4m+EOd0 YIcWaciw3AamckXY1TJGg2wByiQ/pQHv098MLHcN2peNWhw1qOPJNhQAX9jSaXHY3EI4 VF0P1k/d3gNYDZ+SrD1cGvBEyrefh4H09O/mfQyUUDMQN3eTMIx5zvVGYdYZCUWfzoH0 RoipK58PtMvhB2ILzO2Ghg8E10Irbv/OHCBSkQQzqHS6vfkqydeI/9FVGjZ1tIEVFqBL K5rg== X-Gm-Message-State: AFuF++lvOM7530tCuc9YsVJpcS/9vJcc6QQ1LCj9gy8Vkl76qzGu2Oyy ddJkGjXh69S7cRmMpDG3OWp7yU0edCgSiUyavdxNOX3ZDNxEuMl9nso4rP7wMA/O58y1ea6jtnZ NWOcXRcRMhep73aHlGPYhYoVczJxtgv9gPpkg/afHZRO8lenkbFayE4Tuk+0= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a4a:ee0d:0:b0:6b1:a11a:eeaf with SMTP id 006d021491bc7-6b47c6ba8f1mr6529752eaf.13.1788379911436; Wed, 02 Sep 2026 13:11:51 -0700 (PDT) Date: Wed, 02 Sep 2026 13:11:51 -0700 In-Reply-To: <6a964b83.99c12218.408a8.0001.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a988307.9266084e.bf0d7.000e.GAE@google.com> Subject: Forwarded: Re: [syzbot] [ext4?] general protection fault in __bh_submit From: syzbot To: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com. *** Subject: Re: [syzbot] [ext4?] general protection fault in __bh_submit Author: pavankumaryalagada@gmail.com #syz test: git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git 8b72f6626dc39b9e7e82b2721d4f7c3b86286012 diff --git a/fs/buffer.c b/fs/buffer.c index 427d8a817cd5..f46fa6413032 100644 --- a/fs/buffer.c +++ b/fs/buffer.c @@ -1106,7 +1106,8 @@ static void __bh_submit(struct buffer_head *bh, blk_opf_t opf, bio = bio_alloc(bh->b_bdev, 1, opf, GFP_NOIO); - if (folio_test_dropbehind(bh->b_folio) && op_is_write(opf)) + if (bh->b_folio && folio_test_dropbehind(bh->b_folio) && + op_is_write(opf)) bio_set_flag(bio, BIO_COMPLETE_IN_TASK); if (IS_ENABLED(CONFIG_FS_ENCRYPTION))