From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f205.google.com (mail-il1-f205.google.com [209.85.166.205]) (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 E1E9E7DA6C for ; Tue, 10 Dec 2024 07:13:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.205 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733814808; cv=none; b=Jg4A5eC5emHS5ch17QotH3HCwaIhNyRFYLKyBYvumM9uF9j7TGUNdV0uZ+roph9W1JcBuOXtUTZFzEuG5jidyxFK2cAWLSstDL3PsK6g16eQ8HI2gf9cQ3yRzssHf3r1ctcXzZr/VmKVoK+uy08opLnof1DeiHdbZJm4U2gdkVk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733814808; c=relaxed/simple; bh=jW9jS997Hfbw8eEXveSyYtgYHJxaz7pJTScM/jv25D0=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=bcy3pxz+QD+EGp5e8HWULo7CaOgUUDinVXJWC3LkiU/WVGcntO10G2fUz66mtEF+Kbf6ac553tsyr9R1yKxasKucslQhIkJwylXjdMHI9bfE7CP/IyZSHFLehAW7IKJ9ysnjh1Kcnf7F0UuZbLHZi9WOVxBFfxEUUE8toug/QaM= 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=209.85.166.205 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-f205.google.com with SMTP id e9e14a558f8ab-3a9cefa1969so18992815ab.1 for ; Mon, 09 Dec 2024 23:13:25 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1733814805; x=1734419605; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=Ad0U7h1ZCgkYFN9DmZAPWSgdffEfL07q7idd0gdV9ew=; b=Ysn+HMzGlBIIWzRw1V8MsWahJtDNkY60UhfMR3JWDBe3rgP9WHIL9pIOS0YBsZAes9 aplJ4yo80qdLgutwBpxQ9eS3hBObC/MdXWP4TDdrI0fdbvVbPXhLTE8dn2QL379xyb+X vtlL7g657iz9x0WmqSDs0BRYI5z8tIYORuF2QgXCJp6zqhPnuRISmYsV1+EckTHPfHFc ycCPYQb5jyqWteyIBVq7yRWq/U4BwaNtwm4UVZAHc2ltfpiTrdqHir9WAqNOAdPIxPO9 QCihlWUrlqwfd7X0A+J34WRWuzwC0gxwojz+zOBjxclruP2wtYBdYD+LR9ddvacIH48x gZow== X-Forwarded-Encrypted: i=1; AJvYcCWpq1GDCuBGSacEJ8OEqdPtKlA0jxnFsqo/rmAzknAk43GTK1l51dpw+9ulU0Smeq9qhNzqBcukXdG8TfQ=@vger.kernel.org X-Gm-Message-State: AOJu0YxoT+R2TQQbuLx6Fl7an7YXfAX8HAYfqGQFLvvMYDYWozDLPtDG siiheqo7Y063uZRhuZl6Yx2+zmZyzbDIklIv1/phJ5dFfltACycF1Wp22qQ/EnrjcLpbMUflcav tgTWU05jfDfd69tEMIZZTghE7xRuI8kCiodCJ/f6k6wf5p8nd+Oalw/4= X-Google-Smtp-Source: AGHT+IHuqeI37mR8fIT7kGs4q1Z2Jl5oGeUxEejuvH0AqpA4Ex7ihmnVZYrEuAZwWu8seQkie1hqYeeMj34oH/k0sNxM4167Xt2I Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1a44:b0:3a7:fe8c:b015 with SMTP id e9e14a558f8ab-3a9dbb2b58fmr34624705ab.24.1733814804872; Mon, 09 Dec 2024 23:13:24 -0800 (PST) Date: Mon, 09 Dec 2024 23:13:24 -0800 In-Reply-To: <6731d26f.050a0220.1fb99c.014b.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6757ea14.050a0220.a30f1.01c5.GAE@google.com> Subject: Re: [syzbot] [ocfs2?] KASAN: slab-use-after-free Read in ocfs2_lock_global_qf 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" syzbot has found a reproducer for the following issue on: HEAD commit: 7cb1b4663150 Merge tag 'locking_urgent_for_v6.13_rc3' of g.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=15a034df980000 kernel config: https://syzkaller.appspot.com/x/.config?x=c7c9f223bfe8924e dashboard link: https://syzkaller.appspot.com/bug?extid=d173bf8a5a7faeede34c 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=11e0eb30580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=179853e8580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/a883190d5c75/disk-7cb1b466.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/238e5eeeb128/vmlinux-7cb1b466.xz kernel image: https://storage.googleapis.com/syzbot-assets/8bc8850a6795/bzImage-7cb1b466.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/ac761c5756ee/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+d173bf8a5a7faeede34c@syzkaller.appspotmail.com (syz-executor353,5820,1):ocfs2_block_check_validate:402 ERROR: CRC32 failed: stored: 0xcfdff595, computed 0xefed4a20. Applying ECC. JBD2: Ignoring recovery information on journal ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode. ================================================================== BUG: KASAN: slab-use-after-free in ocfs2_lock_global_qf+0xb8/0x2b0 fs/ocfs2/quota_global.c:303 Read of size 8 at addr ffff888035461028 by task syz-executor353/5820 CPU: 0 UID: 0 PID: 5820 Comm: syz-executor353 Not tainted 6.13.0-rc2-syzkaller-00018-g7cb1b4663150 #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:378 [inline] print_report+0x169/0x550 mm/kasan/report.c:489 kasan_report+0x143/0x180 mm/kasan/report.c:602 ocfs2_lock_global_qf+0xb8/0x2b0 fs/ocfs2/quota_global.c:303 ocfs2_get_next_id+0x22c/0x740 fs/ocfs2/quota_global.c:900 dquot_get_next_dqblk+0x73/0x3a0 fs/quota/dquot.c:2702 quota_getnextquota+0x2c5/0x6c0 fs/quota/quota.c:250 __do_sys_quotactl fs/quota/quota.c:961 [inline] __se_sys_quotactl+0x2c4/0xa30 fs/quota/quota.c:917 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: 0033:0x7f3d54632b99 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 17 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:00007ffe711e58a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f3d54632b99 RDX: 0000000000000000 RSI: 00000000200001c0 RDI: ffffffff80000900 RBP: 00007f3d546aa5f0 R08: 0000000020000c40 R09: 000055556b9fb4c0 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe711e58d0 R13: 00007ffe711e5af8 R14: 431bde82d7b634db R15: 00007f3d5467b03b Allocated by task 5820: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:260 [inline] __kmalloc_cache_noprof+0x243/0x390 mm/slub.c:4314 kmalloc_noprof include/linux/slab.h:901 [inline] ocfs2_local_read_info+0x1ee/0x19f0 fs/ocfs2/quota_local.c:699 dquot_load_quota_sb+0x762/0xbb0 fs/quota/dquot.c:2459 dquot_load_quota_inode+0x320/0x600 fs/quota/dquot.c:2496 ocfs2_enable_quotas+0x169/0x450 fs/ocfs2/super.c:926 ocfs2_fill_super+0x4ca1/0x5760 fs/ocfs2/super.c:1141 mount_bdev+0x20a/0x2d0 fs/super.c:1693 legacy_get_tree+0xee/0x190 fs/fs_context.c:662 vfs_get_tree+0x90/0x2b0 fs/super.c:1814 do_new_mount+0x2be/0xb40 fs/namespace.c:3507 do_mount fs/namespace.c:3847 [inline] __do_sys_mount fs/namespace.c:4057 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4034 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 Freed by task 5820: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:582 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2338 [inline] slab_free mm/slub.c:4598 [inline] kfree+0x196/0x430 mm/slub.c:4746 ocfs2_local_free_info+0x81f/0x9a0 fs/ocfs2/quota_local.c:869 dquot_disable+0x1160/0x1cd0 fs/quota/dquot.c:2304 dquot_suspend include/linux/quotaops.h:85 [inline] ocfs2_susp_quotas+0x16c/0x340 fs/ocfs2/super.c:892 ocfs2_remount+0x576/0xc30 fs/ocfs2/super.c:647 reconfigure_super+0x43a/0x870 fs/super.c:1083 do_remount fs/namespace.c:3047 [inline] path_mount+0xc22/0xfa0 fs/namespace.c:3826 do_mount fs/namespace.c:3847 [inline] __do_sys_mount fs/namespace.c:4057 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4034 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 The buggy address belongs to the object at ffff888035461000 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 40 bytes inside of freed 1024-byte region [ffff888035461000, ffff888035461400) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x35460 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000040 ffff88801ac41dc0 ffffea000533c600 0000000000000002 raw: 0000000000000000 0000000080100010 00000001f5000000 0000000000000000 head: 00fff00000000040 ffff88801ac41dc0 ffffea000533c600 0000000000000002 head: 0000000000000000 0000000080100010 00000001f5000000 0000000000000000 head: 00fff00000000003 ffffea0000d51801 ffffffffffffffff 0000000000000000 head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5485, tgid 5485 (S41dhcpcd), ts 36970568324, free_ts 36970094811 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1556 prep_new_page mm/page_alloc.c:1564 [inline] get_page_from_freelist+0x3651/0x37a0 mm/page_alloc.c:3474 __alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4751 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2269 alloc_slab_page+0x6a/0x110 mm/slub.c:2408 allocate_slab+0x5a/0x2b0 mm/slub.c:2574 new_slab mm/slub.c:2627 [inline] ___slab_alloc+0xc27/0x14a0 mm/slub.c:3815 __slab_alloc+0x58/0xa0 mm/slub.c:3905 __slab_alloc_node mm/slub.c:3980 [inline] slab_alloc_node mm/slub.c:4141 [inline] __do_kmalloc_node mm/slub.c:4282 [inline] __kmalloc_noprof+0x2e6/0x4c0 mm/slub.c:4295 kmalloc_noprof include/linux/slab.h:905 [inline] kzalloc_noprof include/linux/slab.h:1037 [inline] tomoyo_init_log+0x1b3d/0x2050 security/tomoyo/audit.c:275 tomoyo_supervisor+0x38a/0x11f0 security/tomoyo/common.c:2089 tomoyo_audit_env_log security/tomoyo/environ.c:36 [inline] tomoyo_env_perm+0x178/0x210 security/tomoyo/environ.c:63 tomoyo_environ security/tomoyo/domain.c:672 [inline] tomoyo_find_next_domain+0x146e/0x1d40 security/tomoyo/domain.c:881 tomoyo_bprm_check_security+0x117/0x180 security/tomoyo/tomoyo.c:102 security_bprm_check+0x86/0x250 security/security.c:1296 search_binary_handler fs/exec.c:1736 [inline] exec_binprm fs/exec.c:1790 [inline] bprm_execve+0xa53/0x17a0 fs/exec.c:1842 page last free pid 5485 tgid 5485 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1127 [inline] free_unref_page+0xd2c/0x1000 mm/page_alloc.c:2657 discard_slab mm/slub.c:2673 [inline] __put_partials+0x160/0x1c0 mm/slub.c:3142 put_cpu_partial+0x17c/0x250 mm/slub.c:3217 __slab_free+0x290/0x380 mm/slub.c:4468 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4104 [inline] slab_alloc_node mm/slub.c:4153 [inline] __do_kmalloc_node mm/slub.c:4282 [inline] __kmalloc_noprof+0x236/0x4c0 mm/slub.c:4295 kmalloc_noprof include/linux/slab.h:905 [inline] tomoyo_add_entry security/tomoyo/common.c:2023 [inline] tomoyo_supervisor+0xe0d/0x11f0 security/tomoyo/common.c:2095 tomoyo_audit_env_log security/tomoyo/environ.c:36 [inline] tomoyo_env_perm+0x178/0x210 security/tomoyo/environ.c:63 tomoyo_environ security/tomoyo/domain.c:672 [inline] tomoyo_find_next_domain+0x146e/0x1d40 security/tomoyo/domain.c:881 tomoyo_bprm_check_security+0x117/0x180 security/tomoyo/tomoyo.c:102 security_bprm_check+0x86/0x250 security/security.c:1296 search_binary_handler fs/exec.c:1736 [inline] exec_binprm fs/exec.c:1790 [inline] bprm_execve+0xa53/0x17a0 fs/exec.c:1842 do_execveat_common+0x55f/0x6f0 fs/exec.c:1949 do_execve fs/exec.c:2023 [inline] __do_sys_execve fs/exec.c:2099 [inline] __se_sys_execve fs/exec.c:2094 [inline] __x64_sys_execve+0x92/0xb0 fs/exec.c:2094 Memory state around the buggy address: ffff888035460f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888035460f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888035461000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888035461080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888035461100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== --- 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.