From nobody Sat Feb 7 15:11:20 2026 Received: from mail-oo1-f70.google.com (mail-oo1-f70.google.com [209.85.161.70]) (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 D11EA27470 for ; Sat, 24 Jan 2026 09:07:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.70 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769245640; cv=none; b=IPrrbbyqgPz+cUDm3qzi1MEeqAjywMT9MgIkQZ8AxEFCLGj3rOjnuWd5j+EOVo32eykjOaia/qjWmO2SpYHbMGottZ7EdYQt/2tQKkQrpITaxurZWUAHVhAMpTMot5IcyJHaESXsS582jkxmF1EjtiDk8ql/g9e8u4/sPCHV9DA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769245640; c=relaxed/simple; bh=iuC3/3KXCe/gkUvHZxHfqP62SrfJGlR7K56sliQBi3c=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=ZvmP6YiwsviJQvIogdc5zO1rakIpRgqEU4Nm9Gw8CCuvL0quBymJnPbwcbbSzBLIzSHx+zXR8tjnH8U/Q5f8pG1nOjrB8Dz2ij2QSkgs96zGsSwMjz+LvoYpS/DESgReZ3ipCrRmlp6g+kv4mst6UkXHSU8x0SlvThWjtPDrJyk= 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=209.85.161.70 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-oo1-f70.google.com with SMTP id 006d021491bc7-6610e4c7e46so5526547eaf.0 for ; Sat, 24 Jan 2026 01:07:18 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1769245637; x=1769850437; 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=yFYDqmp5qPxfGYgn3TrCbuQvRgBaFwyTfgenBETs0wA=; b=fo7R+8vfWckf5Go3zF3BQacFs/JJVLevK+fvVy6cm5YRANAYbMlAOZG3EN3raSk5Zc gcUjLJm775BkHkP+Z7EO02QhH48+pxo/qyV1S2EABWRrUQ3SeodWT41+tSFXwpoRjzgy TMNZ7zJ5ijGY/aRU5I1jTsOBK1gn/ETiDa+E+O3n/2s4Dd/qfn0yKW/TCbiH0BFHV6dC jV2SsMJ8qRaTkCcMesYFUSNpp5O+SJMr/X2Luggm91q8cQeNBo/z17uCShTtNPERk9vB k0CppCdvhgIs5cqPBmA+4pWak4yoqCDpl2a1QyKvns/Pksg9oTChILlTJM1UVOJ7Ixlt WOlQ== X-Gm-Message-State: AOJu0YxxZ7GkQKrVkitXhls5wf+cKHjFo6woZgjQnu2ufGf2ioOwPvjO YUemFpw618BJ9eGjrU2YoF4JoV97GbLtcSDZWN9CLvTBmForpUEdz2VWzLz9XNigLZsk3UFRddM 7kMrtrd15Wivp0NLzAHVjXp+A/90gR0Tpmq+L7odCUCdTGGjlwq0nUQr7U64= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:4a10:b0:659:9a49:9067 with SMTP id 006d021491bc7-662cab43bebmr2001318eaf.50.1769245637716; Sat, 24 Jan 2026 01:07:17 -0800 (PST) Date: Sat, 24 Jan 2026 01:07:17 -0800 In-Reply-To: <69746a86.050a0220.226181.0002.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69748bc5.050a0220.226181.0006.GAE@google.com> Subject: Forwarded: [PATCH] iommufd: Initialize pfn_reader in iopt_area_fill_domains() From: syzbot To: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Transfer-Encoding: quoted-printable 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: [PATCH] iommufd: Initialize pfn_reader in iopt_area_fill_domains() Author: kartikey406@gmail.com #syz test: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git= master KMSAN reported an uninitialized value in batch_add_pfn_num() when accessing batch->npfns[] and batch->pfns[] arrays. This occurs because struct pfn_reader pfns was declared without initialization, leaving the embedded pfn_batch structure and its arrays uninitialized. Initialize pfns to zero to ensure all fields and embedded structures start in a known state. Reported-by: syzbot+df28076a30d726933015@syzkaller.appspotmail.com Signed-off-by: Deepanshu Kartikey --- drivers/iommu/iommufd/pages.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iommu/iommufd/pages.c b/drivers/iommu/iommufd/pages.c index dbe51ecb9a20..a07373cf013c 100644 --- a/drivers/iommu/iommufd/pages.c +++ b/drivers/iommu/iommufd/pages.c @@ -1897,7 +1897,7 @@ int iopt_area_fill_domains(struct iopt_area *area, st= ruct iopt_pages *pages) unsigned long done_all_end_index; struct iommu_domain *domain; unsigned long unmap_index; - struct pfn_reader pfns; + struct pfn_reader pfns =3D {}; unsigned long index; int rc; =20 --=20 2.43.0