From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f198.google.com (mail-il1-f198.google.com [209.85.166.198]) (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 7CB1F1714A4 for ; Wed, 9 Oct 2024 20:34:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.198 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728506064; cv=none; b=GXq++nWQ/hYciPvkbJpbp76fVvWA6IByQhEYz0sYkc3G1By3bXSFLjnVmYQqI4enYgLXFD6GlrJPtsTp92RbStF8wsa78an7oplL/CDWUBQAPtqlBzRsJW777o9aZdKIT7NXQg1dwxX9Qjyg7oSAYbr3tEdDTmyTNKfRa3pF62o= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728506064; c=relaxed/simple; bh=HYNqo+FrutBFmzXam6OlwpksWYE+FxVlu10MgYsz8Ig=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=Qqrt25P8XxLf3io8gtc38Ob5E7O0CBq2VnqduYRemXjw+g+LhiUzY2FUkTV7a79JGJ8Vhw9Fvae+NI2I6OQxpAQcyN5nHnoPlYrXH4aoPvldKBDk2Y1WazIdldKPljdAWnluJaJfrZ9BThtAWC4aJzGwu3FMm6+2sF0EpU+wQUA= 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=209.85.166.198 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-il1-f198.google.com with SMTP id e9e14a558f8ab-3a34eef9ec9so3066465ab.0 for ; Wed, 09 Oct 2024 13:34:22 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1728506062; x=1729110862; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=QSYix+4rQWG4VjgXOlQwElhZAFJZ4sWfAYzwYaj7dE4=; b=sewXydEaWabqjBGpwHIF00cXRbxG5TIj6di5kb1H4ep4sj1dTTPk1U6zoAWLMUyFu6 ONsvq8busnJpC4Pjtz/mAhcxIHUPtl2Krkl9R52T52MeLm9u3wkd7kkv7GvcW7u90FXg rdlQLQAqjfL5ay02NYQF5rS747+N1HX3135f6KBat+BAtkempuXAEZaZOHE+F3TgwIn7 ZD6Jvj781Z3eBxfdpUySI7BwcluL6FUhZUQxe4V/Ph08fg+wCuyu2rSeOSV0V3Ezyzk7 5oW0Uncqr0BlffEKEDoj15Z31UedBdGKmFhqOz0E79VaiAeGnnD9QEJDS1T7Ook0DThD a0Og== X-Forwarded-Encrypted: i=1; AJvYcCXWCFPolG23SzglsahQXCoCGHYSlexYtrZFYE1CmXzP9dY5/iuFzZq2a8qE0Jk/Xq/WjGvJROuTrTJKg4A=@vger.kernel.org X-Gm-Message-State: AOJu0YwGZ+ox7p575SWbjWAmELM2c09oic1fdLT2ckUDice9w/Gn9JZ9 Q3eelAbL17z4GSbxS1tWHafQyGBXeRUwHoJ5oOXkJ9ebJdaSyeysKZgHbrZKVZD6JJHyp1AOqwm BAb2ZVEH8JtjlYZsHE+XvFrnryZ86p6XR7u7VOQuqICYL8iUdrmpSgIE= X-Google-Smtp-Source: AGHT+IFqWY2Y+yRqTYxICn0rzd+ydkpIiiHtWT9HnjvF0MhokQEm033nAmGMsRIaHa+q6t1QRUKs07PVaO/27OoRuS3gxneOn5nw Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:152b:b0:3a2:463f:fd9e with SMTP id e9e14a558f8ab-3a397ce4910mr36647315ab.6.1728506061764; Wed, 09 Oct 2024 13:34:21 -0700 (PDT) Date: Wed, 09 Oct 2024 13:34:21 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6706e8cd.050a0220.67064.0053.GAE@google.com> Subject: [syzbot] [ocfs2?] KASAN: use-after-free Read in __ocfs2_find_path From: syzbot To: jlbec@evilplan.org, joseph.qi@linux.alibaba.com, linux-kernel@vger.kernel.org, mark@fasheh.com, ocfs2-devel@lists.linux.dev, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 27cc6fdf7201 Merge tag 'linux_kselftest-fixes-6.12-rc2' of.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=1653c79f980000 kernel config: https://syzkaller.appspot.com/x/.config?x=f8af0b3195caed62 dashboard link: https://syzkaller.appspot.com/bug?extid=66c146268dc88f4341fd compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12af7bd0580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1153c79f980000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/87f1d994309a/disk-27cc6fdf.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/9c7ccdaf7e44/vmlinux-27cc6fdf.xz kernel image: https://storage.googleapis.com/syzbot-assets/7dc828e4bf0e/bzImage-27cc6fdf.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/036cff156a70/mount_0.gz Bisection is inconclusive: the issue happens on the oldest tested release. bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=111b7d27980000 final oops: https://syzkaller.appspot.com/x/report.txt?x=131b7d27980000 console output: https://syzkaller.appspot.com/x/log.txt?x=151b7d27980000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+66c146268dc88f4341fd@syzkaller.appspotmail.com loop0: detected capacity change from 0 to 32768 ================================================================== BUG: KASAN: use-after-free in __ocfs2_find_path+0x203/0x7e0 fs/ocfs2/alloc.c:1824 Read of size 4 at addr ffff8880707fb000 by task syz-executor231/5221 CPU: 1 UID: 0 PID: 5221 Comm: syz-executor231 Not tainted 6.12.0-rc1-syzkaller-00306-g27cc6fdf7201 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 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 __ocfs2_find_path+0x203/0x7e0 fs/ocfs2/alloc.c:1824 ocfs2_find_leaf+0xcf/0x230 fs/ocfs2/alloc.c:1938 ocfs2_get_clusters_nocache+0x1ad/0xbf0 fs/ocfs2/extent_map.c:418 ocfs2_get_clusters+0x5bd/0xbd0 fs/ocfs2/extent_map.c:621 ocfs2_extent_map_get_blocks+0x24c/0x7d0 fs/ocfs2/extent_map.c:668 ocfs2_read_virt_blocks+0x313/0xb20 fs/ocfs2/extent_map.c:983 ocfs2_read_dir_block fs/ocfs2/dir.c:508 [inline] ocfs2_find_entry_el fs/ocfs2/dir.c:715 [inline] ocfs2_find_entry+0x43b/0x2780 fs/ocfs2/dir.c:1080 ocfs2_find_files_on_disk+0xff/0x360 fs/ocfs2/dir.c:1981 ocfs2_lookup_ino_from_name+0xb1/0x1e0 fs/ocfs2/dir.c:2003 _ocfs2_get_system_file_inode fs/ocfs2/sysfile.c:136 [inline] ocfs2_get_system_file_inode+0x305/0x7b0 fs/ocfs2/sysfile.c:112 ocfs2_init_global_system_inodes+0x32c/0x730 fs/ocfs2/super.c:457 ocfs2_initialize_super fs/ocfs2/super.c:2248 [inline] ocfs2_fill_super+0x2f47/0x5750 fs/ocfs2/super.c:994 mount_bdev+0x20a/0x2d0 fs/super.c:1679 legacy_get_tree+0xee/0x190 fs/fs_context.c:662 vfs_get_tree+0x90/0x2b0 fs/super.c:1800 do_new_mount+0x2be/0xb40 fs/namespace.c:3507 do_mount fs/namespace.c:3847 [inline] __do_sys_mount fs/namespace.c:4055 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4032 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fdb53261dea Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 5e 04 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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:00007fff04142618 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fff04142630 RCX: 00007fdb53261dea RDX: 0000000020004440 RSI: 0000000020000780 RDI: 00007fff04142630 RBP: 0000000000000004 R08: 00007fff04142670 R09: 0000000000004444 R10: 0000000001000000 R11: 0000000000000282 R12: 0000000001000000 R13: 00007fff04142670 R14: 0000000000000003 R15: 0000000001000000 The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x707fb flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 ffffea0001c1ff08 ffff8880b8744af0 0000000000000000 raw: 0000000000000000 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 0x8(__GFP_MOVABLE), pid 1, tgid 1 (swapper/0), ts 11895450743, free_ts 13010080278 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1537 split_free_pages mm/page_alloc.c:6478 [inline] alloc_contig_range_noprof+0x821/0xe20 mm/page_alloc.c:6605 __alloc_contig_pages mm/page_alloc.c:6634 [inline] alloc_contig_pages_noprof+0x4b3/0x5c0 mm/page_alloc.c:6714 debug_vm_pgtable_alloc_huge_page+0xaf/0x100 mm/debug_vm_pgtable.c:1084 init_args+0x83b/0xb20 mm/debug_vm_pgtable.c:1266 debug_vm_pgtable+0xe0/0x550 mm/debug_vm_pgtable.c:1304 do_one_initcall+0x248/0x880 init/main.c:1269 do_initcall_level+0x157/0x210 init/main.c:1331 do_initcalls+0x3f/0x80 init/main.c:1347 kernel_init_freeable+0x435/0x5d0 init/main.c:1580 kernel_init+0x1d/0x2b0 init/main.c:1469 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 page last free pid 1 tgid 1 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1108 [inline] free_unref_page+0xcd0/0xf00 mm/page_alloc.c:2638 free_contig_range+0x152/0x550 mm/page_alloc.c:6748 destroy_args+0x8a/0x840 mm/debug_vm_pgtable.c:1017 debug_vm_pgtable+0x4be/0x550 mm/debug_vm_pgtable.c:1397 do_one_initcall+0x248/0x880 init/main.c:1269 do_initcall_level+0x157/0x210 init/main.c:1331 do_initcalls+0x3f/0x80 init/main.c:1347 kernel_init_freeable+0x435/0x5d0 init/main.c:1580 kernel_init+0x1d/0x2b0 init/main.c:1469 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Memory state around the buggy address: ffff8880707faf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880707faf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8880707fb000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff8880707fb080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff8880707fb100: 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 If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup