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 0366EC7EE23 for ; Tue, 30 May 2023 07:29:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230457AbjE3H3x (ORCPT ); Tue, 30 May 2023 03:29:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56668 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231130AbjE3H3Z (ORCPT ); Tue, 30 May 2023 03:29:25 -0400 Received: from mail-io1-f77.google.com (mail-io1-f77.google.com [209.85.166.77]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AE843A0 for ; Tue, 30 May 2023 00:28:47 -0700 (PDT) Received: by mail-io1-f77.google.com with SMTP id ca18e2360f4ac-760c58747cdso595688839f.0 for ; Tue, 30 May 2023 00:28:47 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1685431727; x=1688023727; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=GSh9hUyZtbwnojTNzsIKr/gm+d/Fj0B6yw6kfN/P478=; b=RFEQq22PSSGk1ujRR7aE6h+YScza9Uq3Qxhw61MW1wRyzKcT8cByXe/0FPbRmXu4nY 1kxb0/dYxP7MO4kaBE3uc6S1hD96NtDiNndfUf+6KGi1elIdg4Iu79mR9xo8hKhfyRCQ qJZfsiGC2d1usD+DDNUw/sqf1Yg47bS2zWHImvLgdKUGuzSXLh3uOHUYwJgYUHXKQX1e TPyKl3p04CXv+OmkWHxGgmKnDGzbr7sVWaXQ06B9rZROszZKzBp8b+QRtJmhZ7VcwzUU qANpHnfRFN3DauazlV0bWIA5Px5IOuciifFra8tgR59EQJ7HbteGmoUYN6+skAz6YCaV Ln/w== X-Gm-Message-State: AC+VfDyAnftV6qkkKqbHg18AZidA6lOtqNqckxROhqw0jVWd3YJFvl+g SPD42HkCdczVpkp2K3U9WIPU/fSjtlFIyge/B5zr28AxpRmZvdxGgQ== X-Google-Smtp-Source: ACHHUZ6AXmq7T1E9PCGhdCkLhqd7hCz2XkATwUYDk0sBNWasSBZQ9Q/Bef3fC3H3tQ1rZ8JDo7WR4susWz05BjaRvmbtYkVvpfAU MIME-Version: 1.0 X-Received: by 2002:a5e:da01:0:b0:774:92dd:d00c with SMTP id x1-20020a5eda01000000b0077492ddd00cmr693012ioj.4.1685431727020; Tue, 30 May 2023 00:28:47 -0700 (PDT) Date: Tue, 30 May 2023 00:28:47 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000061def505fce42755@google.com> Subject: [syzbot] [reiserfs?] KASAN: use-after-free Read in leaf_insert_into_buf (2) From: syzbot To: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, reiserfs-devel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: 8b817fded42d Merge tag 'trace-v6.4-rc3' of git://git.kerne.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=148ef13e280000 kernel config: https://syzkaller.appspot.com/x/.config?x=162cf2103e4a7453 dashboard link: https://syzkaller.appspot.com/bug?extid=d7cdeed5a447f1c47642 compiler: Debian clang version 15.0.7, 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/12840ae00ca5/disk-8b817fde.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/b4d5be3149d0/vmlinux-8b817fde.xz kernel image: https://storage.googleapis.com/syzbot-assets/ad44aa439756/bzImage-8b817fde.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+d7cdeed5a447f1c47642@syzkaller.appspotmail.com ================================================================== BUG: KASAN: use-after-free in leaf_insert_into_buf+0x32b/0x9a0 fs/reiserfs/lbalance.c:942 Read of size 560 at addr ffff88808310fdd0 by task syz-executor.2/8456 CPU: 1 PID: 8456 Comm: syz-executor.2 Not tainted 6.4.0-rc4-syzkaller-00031-g8b817fded42d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:351 [inline] print_report+0x163/0x540 mm/kasan/report.c:462 kasan_report+0x176/0x1b0 mm/kasan/report.c:572 kasan_check_range+0x283/0x290 mm/kasan/generic.c:187 __asan_memmove+0x29/0x70 mm/kasan/shadow.c:94 leaf_insert_into_buf+0x32b/0x9a0 fs/reiserfs/lbalance.c:942 leaf_item_bottle fs/reiserfs/lbalance.c:508 [inline] leaf_copy_items fs/reiserfs/lbalance.c:617 [inline] leaf_move_items+0x1c3c/0x2960 fs/reiserfs/lbalance.c:726 balance_leaf_new_nodes_paste_whole fs/reiserfs/do_balan.c:1162 [inline] balance_leaf_new_nodes_paste fs/reiserfs/do_balan.c:1215 [inline] balance_leaf_new_nodes fs/reiserfs/do_balan.c:1246 [inline] balance_leaf+0x6519/0x12510 fs/reiserfs/do_balan.c:1450 do_balance+0x30d/0x8f0 fs/reiserfs/do_balan.c:1888 reiserfs_paste_into_item+0x732/0x870 fs/reiserfs/stree.c:2157 reiserfs_get_block+0x2250/0x5130 fs/reiserfs/inode.c:1069 __block_write_begin_int+0x548/0x1a50 fs/buffer.c:2064 reiserfs_write_begin+0x24d/0x520 fs/reiserfs/inode.c:2773 generic_cont_expand_simple+0x18b/0x2a0 fs/buffer.c:2425 reiserfs_setattr+0x57d/0x1140 fs/reiserfs/inode.c:3303 notify_change+0xc8b/0xf40 fs/attr.c:483 do_truncate+0x220/0x300 fs/open.c:66 do_sys_ftruncate+0x2e4/0x380 fs/open.c:194 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f776d08c169 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f776de92168 EFLAGS: 00000246 ORIG_RAX: 000000000000004d RAX: ffffffffffffffda RBX: 00007f776d1abf80 RCX: 00007f776d08c169 RDX: 0000000000000000 RSI: 0000000002007fff RDI: 0000000000000006 RBP: 00007f776d0e7ca1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd470abb9f R14: 00007f776de92300 R15: 0000000000022000 The buggy address belongs to the physical page: page:ffffea00020c43c0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x8310f flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000000 dead000000000100 dead000000000122 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 8246, tgid 8245 (syz-executor.1), ts 348547156288, free_ts 348894457393 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1731 prep_new_page mm/page_alloc.c:1738 [inline] get_page_from_freelist+0x321c/0x33a0 mm/page_alloc.c:3502 __alloc_pages+0x255/0x670 mm/page_alloc.c:4768 __folio_alloc+0x13/0x30 mm/page_alloc.c:4800 vma_alloc_folio+0x48a/0x9a0 mm/mempolicy.c:2240 shmem_alloc_folio mm/shmem.c:1579 [inline] shmem_alloc_and_acct_folio+0x5e7/0xe10 mm/shmem.c:1603 shmem_get_folio_gfp+0x120f/0x3470 mm/shmem.c:1948 shmem_get_folio mm/shmem.c:2079 [inline] shmem_write_begin+0x172/0x4e0 mm/shmem.c:2573 generic_perform_write+0x300/0x5e0 mm/filemap.c:3923 __generic_file_write_iter+0x17a/0x400 mm/filemap.c:4051 generic_file_write_iter+0xaf/0x310 mm/filemap.c:4083 call_write_iter include/linux/fs.h:1868 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x790/0xb20 fs/read_write.c:584 ksys_write+0x1a0/0x2c0 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1302 [inline] free_unref_page_prepare+0x903/0xa30 mm/page_alloc.c:2564 free_unref_page_list+0x596/0x830 mm/page_alloc.c:2705 release_pages+0x2193/0x2470 mm/swap.c:1042 __pagevec_release+0x84/0x100 mm/swap.c:1062 pagevec_release include/linux/pagevec.h:63 [inline] folio_batch_release include/linux/pagevec.h:132 [inline] shmem_undo_range+0x6af/0x1ba0 mm/shmem.c:954 shmem_truncate_range mm/shmem.c:1049 [inline] shmem_evict_inode+0x258/0x9f0 mm/shmem.c:1164 evict+0x2a4/0x620 fs/inode.c:665 __dentry_kill+0x436/0x650 fs/dcache.c:607 dentry_kill+0xbb/0x290 dput+0x1f3/0x420 fs/dcache.c:913 __fput+0x5e4/0x890 fs/file_table.c:329 task_work_run+0x24a/0x300 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xd9/0x100 kernel/entry/common.c:171 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:297 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86 Memory state around the buggy address: ffff88808310fc80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88808310fd00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff88808310fd80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff88808310fe00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88808310fe80: 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. If the bug is already fixed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to change bug's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the bug is a duplicate of another bug, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup