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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4F49CC4332F for ; Tue, 24 May 2022 00:18:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229591AbiEXAS5 (ORCPT ); Mon, 23 May 2022 20:18:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33652 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232300AbiEXARi (ORCPT ); Mon, 23 May 2022 20:17:38 -0400 Received: from mail-io1-f70.google.com (mail-io1-f70.google.com [209.85.166.70]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 50FF7A0D29 for ; Mon, 23 May 2022 17:17:22 -0700 (PDT) Received: by mail-io1-f70.google.com with SMTP id x13-20020a0566022c4d00b0065491fa5614so9069356iov.9 for ; Mon, 23 May 2022 17:17:21 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=Ib/wnmiCE4UrP+PxplezNKep0P0zos65On51qeE2Ixk=; b=zFFf29S2nY3BRMUvQBnubgqZAznQYMWYJ5yhlz5+efkY0o6HjZm27ODwykTolETt08 jyKTu/xqztMgxlwHSgQQPzRK7GQsgIVK3sC/yzZYNkBdVj2sBN7WP939vvOwT1NV0b6x P6K0AiuFj6ZJ1DBMx2gyuT5SixYiwMbkFHlDW5ISXbDqe+1w3IovxxT/6ZYacCZfMx7d DwFKxcnSsqQuF10CnE0I0UGjdMvj9PWBbCGCTUmYEjkCWzIcSNoYDY7MgnUdRIAOEOBF 94U1FRk8fuFgCzGSzds1c0NXEJCfNQ92RMmcQNipq3cvZ4dfZoymJjUsc8YSEgAT/xbN 4IbQ== X-Gm-Message-State: AOAM531+sy+d9wHpq8C307XyVDVdHsUo+F58HYY3Vu9g+dLybCysueDW LAzIh9+mLBfptfaWZpp3dqSXAz8d8CL/FLC0xUXbqWFak0OL X-Google-Smtp-Source: ABdhPJxzML7BkMvXkFicQjwEclQXlI5deOFK0DZz/OyRF/kTkCK8hKElqSZUX0gqMs8w3VjglLxhzaEZm49JXix+zN/tqpwitNra MIME-Version: 1.0 X-Received: by 2002:a05:6638:379c:b0:32e:d7a6:b715 with SMTP id w28-20020a056638379c00b0032ed7a6b715mr2583100jal.102.1653351441160; Mon, 23 May 2022 17:17:21 -0700 (PDT) Date: Mon, 23 May 2022 17:17:21 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000056e02f05dfb6e11a@google.com> Subject: [syzbot] KASAN: use-after-free Write in udf_close_lvid From: syzbot To: akpm@linux-foundation.org, alden.tondettar@gmail.com, hch@infradead.org, jack@suse.com, jack@suse.cz, linux-kernel@vger.kernel.org, pali@kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: 4b0986a3613c Linux 5.18 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=125ba355f00000 kernel config: https://syzkaller.appspot.com/x/.config?x=1350d397b63b3036 dashboard link: https://syzkaller.appspot.com/bug?extid=60864ed35b1073540d57 compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1732a04df00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15189639f00000 The issue was bisected to: commit 781d2a9a2fc7d0be53a072794dc03ef6de770f3d Author: Jan Kara Date: Mon May 3 09:39:03 2021 +0000 udf: Check LVID earlier bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=14deecd3f00000 final oops: https://syzkaller.appspot.com/x/report.txt?x=16deecd3f00000 console output: https://syzkaller.appspot.com/x/log.txt?x=12deecd3f00000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+60864ed35b1073540d57@syzkaller.appspotmail.com Fixes: 781d2a9a2fc7 ("udf: Check LVID earlier") UDF-fs: error (device loop0): udf_fill_super: Error in udf_iget, block=96, partition=0 ================================================================== BUG: KASAN: use-after-free in udf_close_lvid+0x68a/0x980 fs/udf/super.c:2072 Write of size 1 at addr ffff8880839e0190 by task syz-executor234/3615 CPU: 1 PID: 3615 Comm: syz-executor234 Not tainted 5.18.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 print_address_description+0x65/0x4b0 mm/kasan/report.c:313 print_report+0xf4/0x210 mm/kasan/report.c:429 kasan_report+0xfb/0x130 mm/kasan/report.c:491 udf_close_lvid+0x68a/0x980 fs/udf/super.c:2072 udf_fill_super+0xde8/0x1b20 fs/udf/super.c:2309 mount_bdev+0x26c/0x3a0 fs/super.c:1367 legacy_get_tree+0xea/0x180 fs/fs_context.c:610 vfs_get_tree+0x88/0x270 fs/super.c:1497 do_new_mount+0x289/0xad0 fs/namespace.c:3040 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fd64e59b08a Code: 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 a8 00 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fd64e546168 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fd64e5461c0 RCX: 00007fd64e59b08a RDX: 0000000020000000 RSI: 0000000020000700 RDI: 00007fd64e546180 RBP: 000000000000000e R08: 00007fd64e5461c0 R09: 00007fd64e5466b8 R10: 0000000000000810 R11: 0000000000000286 R12: 00007fd64e546180 R13: 0000000020000350 R14: 0000000000000003 R15: 0000000000000004 The buggy address belongs to the physical page: page:ffffea00020e7800 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x839e0 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 ffffea00020e7808 ffffea00020e7808 0000000000000000 raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner info is not present (never set?) Memory state around the buggy address: ffff8880839e0080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff8880839e0100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff8880839e0180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff8880839e0200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff8880839e0280: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ================================================================== --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches