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 BDE89C433FE for ; Sat, 1 Oct 2022 14:28:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229717AbiJAO2z (ORCPT ); Sat, 1 Oct 2022 10:28:55 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37742 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229715AbiJAO2m (ORCPT ); Sat, 1 Oct 2022 10:28:42 -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 CF9FB15FC3 for ; Sat, 1 Oct 2022 07:28:36 -0700 (PDT) Received: by mail-io1-f70.google.com with SMTP id w16-20020a6b4a10000000b006a5454c789eso4546006iob.20 for ; Sat, 01 Oct 2022 07:28:36 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date; bh=RmyNMWr5W99uufCqHVPLupIj6BiTQ9auDvoBoBSZjwg=; b=TFb2XZ+O/OKHrHV3f6m07Ccbso9e7lCTHkwyi7r1eV8hXbRvyU/DWTUuXYvzBLJprH +SlUt15Ylok9cNbetCL7mq/0LgAbmBiVe9h5HlMojVmKR0L++H0javERepQeldPpazZO oXDz6ss6AdyqWuq6W3wMVaf0IhSagbDKwzmOojBHX+u23F38z8vViWjW9XlSJS2Izxu7 8Uu2RsZYu4UeQbpfEA2GlwLoRCHENhJ2h6Npbudi4CkKynJ3GTWwtf70rtyfO1VpYJrA hh/0v/7AZq4q+lAoHA8Ot8l51OgX6QOHEoMY0IwMWSgzyN1jMZ7m+3NUDyXaMEdlw1eg EQYg== X-Gm-Message-State: ACrzQf1jrU+vqLIA3fDET3QncuBh0+2/e4lGC1F9xgUyWyopXsxzc8Jk DvCEep8gKJgsHUxMh2LKSPB7XGxRTKZOXfjMjM3d81KYVkNU X-Google-Smtp-Source: AMsMyM7zeDAKE2aSAPyZFSdjme2yhfzBOW/DjmfjbxFTzYO3/CtgjOXHyeXhjxxq/ojqNQeEUSld+gk5Qa2OoHlq8XT8voEkxcWI MIME-Version: 1.0 X-Received: by 2002:a05:6e02:20c3:b0:2f1:b33c:63e4 with SMTP id 3-20020a056e0220c300b002f1b33c63e4mr6807547ilq.144.1664634515370; Sat, 01 Oct 2022 07:28:35 -0700 (PDT) Date: Sat, 01 Oct 2022 07:28:35 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000f8389205e9f9ec5f@google.com> Subject: [syzbot] KASAN: use-after-free Read in crc_itu_t From: syzbot To: jack@suse.com, linux-kernel@vger.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: 70575e77839f Merge tag 'for_linus' of git://git.kernel.org.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11a3bd70880000 kernel config: https://syzkaller.appspot.com/x/.config?x=ba0d23aa7e1ffaf5 dashboard link: https://syzkaller.appspot.com/bug?extid=d8fc21bfa138a5ae916d compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/d99310e4b1b7/disk-70575e77.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/ef3a5647354c/vmlinux-70575e77.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+d8fc21bfa138a5ae916d@syzkaller.appspotmail.com ================================================================== BUG: KASAN: use-after-free in crc_itu_t+0x1dd/0x2b0 lib/crc-itu-t.c:60 Read of size 1 at addr ffff888086d82000 by task syz-executor.3/3631 CPU: 1 PID: 3631 Comm: syz-executor.3 Not tainted 6.0.0-rc7-syzkaller-00180-g70575e77839f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106 print_address_description+0x65/0x4b0 mm/kasan/report.c:317 print_report+0x108/0x1f0 mm/kasan/report.c:433 kasan_report+0xc3/0xf0 mm/kasan/report.c:495 crc_itu_t+0x1dd/0x2b0 lib/crc-itu-t.c:60 udf_finalize_lvid fs/udf/super.c:2021 [inline] udf_sync_fs+0x1bc/0x360 fs/udf/super.c:2377 sync_filesystem+0xe8/0x220 fs/sync.c:56 generic_shutdown_super+0x6b/0x300 fs/super.c:474 kill_block_super+0x79/0xd0 fs/super.c:1427 deactivate_locked_super+0xa7/0xf0 fs/super.c:332 cleanup_mnt+0x4ce/0x560 fs/namespace.c:1186 task_work_run+0x146/0x1c0 kernel/task_work.c:177 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0x124/0x150 kernel/entry/common.c:169 exit_to_user_mode_prepare+0xb2/0x140 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline] syscall_exit_to_user_mode+0x26/0x60 kernel/entry/common.c:294 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f27d8c8ba17 Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 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:00007ffdc87f33e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f27d8c8ba17 RDX: 00007ffdc87f34bb RSI: 000000000000000a RDI: 00007ffdc87f34b0 RBP: 00007ffdc87f34b0 R08: 00000000ffffffff R09: 00007ffdc87f3280 R10: 0000555555a338b3 R11: 0000000000000246 R12: 00007f27d8ce45f6 R13: 00007ffdc87f4570 R14: 0000555555a33810 R15: 00007ffdc87f45b0 The buggy address belongs to the physical page: page:ffffea00021b6080 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x86d82 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 ffffea00021b60c8 ffffea00021cd108 0000000000000000 raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as freed page last allocated via order 0, migratetype Movable, gfp_mask 0x140cca(GFP_HIGHUSER_MOVABLE|__GFP_COMP), pid 5709, tgid 5709 (udevadm), ts 809679576496, free_ts 809958426983 prep_new_page mm/page_alloc.c:2532 [inline] get_page_from_freelist+0x742/0x7c0 mm/page_alloc.c:4283 __alloc_pages+0x259/0x560 mm/page_alloc.c:5549 __folio_alloc+0xf/0x30 mm/page_alloc.c:5580 vma_alloc_folio+0x662/0xb60 mm/mempolicy.c:2231 alloc_page_vma include/linux/gfp.h:290 [inline] do_cow_fault+0xa6/0x5d0 mm/memory.c:4543 do_fault mm/memory.c:4655 [inline] handle_pte_fault mm/memory.c:4917 [inline] __handle_mm_fault mm/memory.c:5059 [inline] handle_mm_fault+0x1b9d/0x3590 mm/memory.c:5157 do_user_addr_fault+0x69b/0xcb0 arch/x86/mm/fault.c:1397 handle_page_fault arch/x86/mm/fault.c:1488 [inline] exc_page_fault+0x7a/0x110 arch/x86/mm/fault.c:1544 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1449 [inline] free_pcp_prepare+0x812/0x900 mm/page_alloc.c:1499 free_unref_page_prepare mm/page_alloc.c:3380 [inline] free_unref_page_list+0xb4/0x7b0 mm/page_alloc.c:3522 release_pages+0x22c3/0x2540 mm/swap.c:1012 tlb_batch_pages_flush mm/mmu_gather.c:58 [inline] tlb_flush_mmu_free mm/mmu_gather.c:255 [inline] tlb_flush_mmu+0x850/0xa70 mm/mmu_gather.c:262 tlb_finish_mmu+0xcb/0x200 mm/mmu_gather.c:353 exit_mmap+0x1cb/0x520 mm/mmap.c:3118 __mmput+0x111/0x3a0 kernel/fork.c:1187 exit_mm+0x1ef/0x2c0 kernel/exit.c:510 do_exit+0x4e1/0x20a0 kernel/exit.c:782 do_group_exit+0x23b/0x2f0 kernel/exit.c:925 __do_sys_exit_group kernel/exit.c:936 [inline] __se_sys_exit_group kernel/exit.c:934 [inline] __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:934 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffff888086d81f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888086d81f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888086d82000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff888086d82080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888086d82100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ================================================================== --- This report is generated by a bot. 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