From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.sourceforge.net (lists.sourceforge.net [216.105.38.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id AFCB9C27C53 for ; Wed, 5 Jun 2024 11:51:55 +0000 (UTC) Received: from [127.0.0.1] (helo=sfs-ml-2.v29.lw.sourceforge.com) by sfs-ml-2.v29.lw.sourceforge.com with esmtp (Exim 4.95) (envelope-from ) id 1sEpBK-0007oG-Od; Wed, 05 Jun 2024 11:51:55 +0000 Received: from [172.30.29.66] (helo=mx.sourceforge.net) by sfs-ml-2.v29.lw.sourceforge.com with esmtps (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1sEpBJ-0007o5-Te for linux-f2fs-devel@lists.sourceforge.net; Wed, 05 Jun 2024 11:51:54 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sourceforge.net; s=x; h=Content-Transfer-Encoding:MIME-Version:References: In-Reply-To:Message-ID:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=Meirxv5lIFq7FMj1p7VGH64FQLGC6LoS7qeJeOSBi3M=; b=N/JCXPhN+QlynezmISMBEkW78e y4epR0Oc286KfdHH/MXY2jZLU06csAfzLpprKz8UamVYSJ71fASZh1G7KSmJCPEfiy8FMVy5AP9Dx quSIHJCLmKPcVf5zRK0OYl/YInAgqjLOjLJ0OvMhmsusIlVt0WUjWy+jVpZameo3ojqI=; DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sf.net; s=x ; h=Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-ID: Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=Meirxv5lIFq7FMj1p7VGH64FQLGC6LoS7qeJeOSBi3M=; b=VmwHspNAAdpmfLd6UKPrqqTwJL 7oJtFVFnk5pCTpg31eISAZUYvimfrI4ueM1D6pQ8czfT3ngd9KgThZgbqTHzkggGG1T+8YEIAYtZR epVhX2zTUqIUUdTa51I6OtfEFYT9P3y8wEVEZk/pKaZAZJhLL9MSox/StK0rltOyJsow=; Received: from dfw.source.kernel.org ([139.178.84.217]) by sfi-mx-2.v28.lw.sourceforge.com with esmtps (TLS1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.95) id 1sEpBJ-0008Pe-PY for linux-f2fs-devel@lists.sourceforge.net; Wed, 05 Jun 2024 11:51:54 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id A2A9C61657; Wed, 5 Jun 2024 11:51:42 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A3A61C3277B; Wed, 5 Jun 2024 11:51:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1717588302; bh=5ESzbzLr3c0iZ5RB9q1kArjcC2Aj3Pqfx7KDrR3mhBw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=CPXb9FFHwmgNqyXpwY/pb/S6e/aoevg3/VRJiKf2LvGxfwP9nzDEQWvvD4WGITb+U vfIOUYvmKh+Upe+gUzNsYOxo64+G3oo+/XNvtDh9FEhlSBpoWjnwlK9tXW/FcosTcV CekNwWHvRc+JPL1LaF7S/K//YFhI/8QCGEEXx9Kre4C1mW6rIHMKdmgFPXRPOwr1OI tUfZi6teg6loD0pQYbzIUiwCVljF6QJlsAAiZ2gW6qqlK8tIWTqplwoE/MnYyicimw YYkxHrygwKWbhWZ+YpNFJHIGQy78LJXenfleU4K1sIG5TUejB51G8/AcnV8wz3T1wQ K/3DQ8wZRoMSQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Date: Wed, 5 Jun 2024 07:50:26 -0400 Message-ID: <20240605115101.2962372-16-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240605115101.2962372-1-sashal@kernel.org> References: <20240605115101.2962372-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 6.8.12 X-Headers-End: 1sEpBJ-0008Pe-PY Subject: [f2fs-dev] [PATCH AUTOSEL 6.8 16/24] f2fs: fix to do sanity check on i_xattr_nid in sanity_check_inode() X-BeenThere: linux-f2fs-devel@lists.sourceforge.net X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Sasha Levin , Jaegeuk Kim , syzbot+3694e283cf5c40df6d14@syzkaller.appspotmail.com, linux-f2fs-devel@lists.sourceforge.net Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net From: Chao Yu [ Upstream commit 20faaf30e55522bba2b56d9c46689233205d7717 ] syzbot reports a kernel bug as below: F2FS-fs (loop0): Mounted with checkpoint version = 48b305e4 ================================================================== BUG: KASAN: slab-out-of-bounds in f2fs_test_bit fs/f2fs/f2fs.h:2933 [inline] BUG: KASAN: slab-out-of-bounds in current_nat_addr fs/f2fs/node.h:213 [inline] BUG: KASAN: slab-out-of-bounds in f2fs_get_node_info+0xece/0x1200 fs/f2fs/node.c:600 Read of size 1 at addr ffff88807a58c76c by task syz-executor280/5076 CPU: 1 PID: 5076 Comm: syz-executor280 Not tainted 6.9.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 f2fs_test_bit fs/f2fs/f2fs.h:2933 [inline] current_nat_addr fs/f2fs/node.h:213 [inline] f2fs_get_node_info+0xece/0x1200 fs/f2fs/node.c:600 f2fs_xattr_fiemap fs/f2fs/data.c:1848 [inline] f2fs_fiemap+0x55d/0x1ee0 fs/f2fs/data.c:1925 ioctl_fiemap fs/ioctl.c:220 [inline] do_vfs_ioctl+0x1c07/0x2e50 fs/ioctl.c:838 __do_sys_ioctl fs/ioctl.c:902 [inline] __se_sys_ioctl+0x81/0x170 fs/ioctl.c:890 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The root cause is we missed to do sanity check on i_xattr_nid during f2fs_iget(), so that in fiemap() path, current_nat_addr() will access nat_bitmap w/ offset from invalid i_xattr_nid, result in triggering kasan bug report, fix it. Reported-and-tested-by: syzbot+3694e283cf5c40df6d14@syzkaller.appspotmail.com Closes: https://lore.kernel.org/linux-f2fs-devel/00000000000094036c0616e72a1d@google.com Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim Signed-off-by: Sasha Levin --- fs/f2fs/inode.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c index c26effdce9aa7..2af50bc34fcd7 100644 --- a/fs/f2fs/inode.c +++ b/fs/f2fs/inode.c @@ -361,6 +361,12 @@ static bool sanity_check_inode(struct inode *inode, struct page *node_page) return false; } + if (fi->i_xattr_nid && f2fs_check_nid_range(sbi, fi->i_xattr_nid)) { + f2fs_warn(sbi, "%s: inode (ino=%lx) has corrupted i_xattr_nid: %u, run fsck to fix.", + __func__, inode->i_ino, fi->i_xattr_nid); + return false; + } + return true; } -- 2.43.0 _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel