From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f80.google.com (mail-io1-f80.google.com [209.85.166.80]) (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 181FA5C82 for ; Sun, 23 Jun 2024 01:34:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.80 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719106466; cv=none; b=YwQ1rVxQeDl0y2NNUriaRCYvoiEwSCEhNhuwwFn4DtAw3JPQdYOiYY5io0+ixvt95Tw3sNe9sdishT3yR8xpf1O9vI+TnoN2JtsOP4bk1RtRJhHeLTgjIlD9qDolOCxFZFKva3ZL/4y4QbBSIFESa2JOrvd0g5spOQjioXnVnUM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719106466; c=relaxed/simple; bh=yqNyMBfZV6dZbRV9J6BbpxWDhPm8Cf+7ggygEn5AGCY=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=X7YGaHFMAEQrTt0eHoVQcbR9E0XTHPLbLHNuX4OyaP8MbURx0V6pIHypRCsT+Ns1hNF2YE9xr5JFANbGBgo5DYed4IYxcd7iUFde2oUmWXMP+b6G3miTC3kHz9C37Fu+2tz2NRaxDA0iYtk8EzIrrOU4jwcNosLA6ghzrj2qCGA= 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=209.85.166.80 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-io1-f80.google.com with SMTP id ca18e2360f4ac-7eb1d659c76so382837639f.0 for ; Sat, 22 Jun 2024 18:34:24 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1719106464; x=1719711264; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=tVfnXdzxczVRUdCZfOpRCU6djsNC+0tvUvfUUQlgF10=; b=SvmHSsJ3Uij5QzP/Tbafq1CfE/DWlEh/yGDEe3DpJE5E4TXqt/TlEVE1fX5C/0KQwv XYTStU3sMnmKNZtcgu834KYjCHzVLlVFrLlo7cVUFDBqHHQ9mWRTl6y4KvH5K0vker3P slwLutq5FZiXWFpm58ld9h9W1+lYRbr9+poG4p4FxAdjBphAZL+grK/LYO2HwDn8iJ9L LUJcj8P6T8SAARBu/dgSRjaL+SkH43jM9ZwDg/DjZk0VstAFyIv71OUXmyNWeYRYwFOU URnJQHnJFrgUu3yLnTHWqhgzJGe8Lb2QrHOPw3kitGD0CRzdJKR6Iyqrda1oBHMpNe1L h9mw== X-Forwarded-Encrypted: i=1; AJvYcCVFhJNL0z+lRxVxw7uBf9uErbMzc2Zvabs0/nbX9k01v2QDSMRGBM+r9OVv1RQiVCkXPlGvwzRlvYMGlsRqgV7oECX24OWcgm6p+LgY X-Gm-Message-State: AOJu0YwDtiSgPdrU1zQx2bzhlti5/OvL6VUXwKiUvSnNlJPmiUGlO9fU zzx8ToSUiRmgj1vamwmg/2jFpwxRjYlQHC03vSH1RCrJT4/svBl9rHJJ3NRJ8W5bHe3izsU/d7q MMAWVwEsk8LDz7tzwKOH8z4UQt72TphVHkuMAFWCZnXCz35w+ZyISDGY= X-Google-Smtp-Source: AGHT+IFXP30TxNDi7BmtHFH+Ee0fNjXLbp21l+C+PwPciJVO/DtT/+bG2zVfConmwk6Q098jXicf3SYtj0DDXjrUF3KRN2oTeRdn Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6602:2dd4:b0:7eb:8a0f:1f4d with SMTP id ca18e2360f4ac-7f3a4f8542amr1431039f.4.1719106464141; Sat, 22 Jun 2024 18:34:24 -0700 (PDT) Date: Sat, 22 Jun 2024 18:34:24 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000002063c0061b84aa5c@google.com> Subject: [syzbot] [mm?] KASAN: slab-use-after-free Read in move_to_new_folio (2) From: syzbot To: akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 563a50672d8a Merge tag 'xfs-6.10-fixes-4' of git://git.ker.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1599afb1980000 kernel config: https://syzkaller.appspot.com/x/.config?x=c3820d4fff43c7a3 dashboard link: https://syzkaller.appspot.com/bug?extid=3961aebd12fe0ea4a3e8 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-563a5067.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/6ef95d163dde/vmlinux-563a5067.xz kernel image: https://storage.googleapis.com/syzbot-assets/0102d9e1ac9a/bzImage-563a5067.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+3961aebd12fe0ea4a3e8@syzkaller.appspotmail.com ================================================================== BUG: KASAN: slab-use-after-free in instrument_atomic_read include/linux/instrumented.h:68 [inline] BUG: KASAN: slab-use-after-free in _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] BUG: KASAN: slab-use-after-free in mapping_unmovable include/linux/pagemap.h:325 [inline] BUG: KASAN: slab-use-after-free in move_to_new_folio+0x12a/0x700 mm/migrate.c:968 Read of size 8 at addr ffff8880486117e0 by task kcompactd0/44 CPU: 3 PID: 44 Comm: kcompactd0 Not tainted 6.10.0-rc4-syzkaller-00283-g563a50672d8a #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [inline] print_report+0xc3/0x620 mm/kasan/report.c:488 kasan_report+0xd9/0x110 mm/kasan/report.c:601 check_region_inline mm/kasan/generic.c:183 [inline] kasan_check_range+0xef/0x1a0 mm/kasan/generic.c:189 instrument_atomic_read include/linux/instrumented.h:68 [inline] _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] mapping_unmovable include/linux/pagemap.h:325 [inline] move_to_new_folio+0x12a/0x700 mm/migrate.c:968 migrate_folio_move mm/migrate.c:1287 [inline] migrate_pages_batch+0x1e88/0x2f80 mm/migrate.c:1807 migrate_pages_sync mm/migrate.c:1873 [inline] migrate_pages+0x1b5a/0x27a0 mm/migrate.c:1982 compact_zone+0x1f68/0x4280 mm/compaction.c:2664 compact_node+0x1a2/0x2d0 mm/compaction.c:2928 kcompactd+0x76e/0xde0 mm/compaction.c:3226 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Allocated by task 25044: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:312 [inline] __kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:338 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3941 [inline] slab_alloc_node mm/slub.c:4001 [inline] kmem_cache_alloc_lru_noprof+0x121/0x2f0 mm/slub.c:4020 nilfs_alloc_inode+0x26/0x150 fs/nilfs2/super.c:154 alloc_inode+0x5d/0x230 fs/inode.c:261 iget5_locked fs/inode.c:1235 [inline] iget5_locked+0x1c9/0x2c0 fs/inode.c:1228 nilfs_iget_locked+0xa1/0xe0 fs/nilfs2/inode.c:606 nilfs_ifile_read+0x2f/0x1e0 fs/nilfs2/ifile.c:192 nilfs_attach_checkpoint+0x12d/0x1d0 fs/nilfs2/super.c:557 nilfs_fill_super fs/nilfs2/super.c:1067 [inline] nilfs_get_tree+0x951/0x1000 fs/nilfs2/super.c:1211 vfs_get_tree+0x8f/0x380 fs/super.c:1780 do_new_mount fs/namespace.c:3352 [inline] path_mount+0x14e6/0x1f20 fs/namespace.c:3679 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount fs/namespace.c:3875 [inline] __x64_sys_mount+0x297/0x320 fs/namespace.c:3875 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 34: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579 poison_slab_object+0xf7/0x160 mm/kasan/common.c:240 __kasan_slab_free+0x32/0x50 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2196 [inline] slab_free mm/slub.c:4437 [inline] kmem_cache_free+0x12f/0x3a0 mm/slub.c:4512 i_callback+0x43/0x70 fs/inode.c:250 rcu_do_batch kernel/rcu/tree.c:2535 [inline] rcu_core+0x828/0x16b0 kernel/rcu/tree.c:2809 handle_softirqs+0x216/0x8f0 kernel/softirq.c:554 run_ksoftirqd kernel/softirq.c:928 [inline] run_ksoftirqd+0x3a/0x60 kernel/softirq.c:920 smpboot_thread_fn+0x661/0xa10 kernel/smpboot.c:164 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Last potentially related work creation: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 __kasan_record_aux_stack+0xba/0xd0 mm/kasan/generic.c:541 __call_rcu_common.constprop.0+0x9a/0x790 kernel/rcu/tree.c:3072 destroy_inode+0x12c/0x1b0 fs/inode.c:316 iput_final fs/inode.c:1741 [inline] iput.part.0+0x5a8/0x7f0 fs/inode.c:1767 iput+0x5c/0x80 fs/inode.c:1757 nilfs_put_root+0xae/0xe0 fs/nilfs2/the_nilfs.c:925 nilfs_segctor_destroy fs/nilfs2/segment.c:2788 [inline] nilfs_detach_log_writer+0x5ef/0xaa0 fs/nilfs2/segment.c:2850 nilfs_put_super+0x43/0x1b0 fs/nilfs2/super.c:498 generic_shutdown_super+0x159/0x3d0 fs/super.c:642 kill_block_super+0x3b/0x90 fs/super.c:1676 deactivate_locked_super+0xbe/0x1a0 fs/super.c:473 deactivate_super+0xde/0x100 fs/super.c:506 cleanup_mnt+0x222/0x450 fs/namespace.c:1267 task_work_run+0x14e/0x250 kernel/task_work.c:180 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x278/0x2a0 kernel/entry/common.c:218 do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff888048611338 which belongs to the cache nilfs2_inode_cache of size 1512 The buggy address is located 1192 bytes inside of freed 1512-byte region [ffff888048611338, ffff888048611920) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x48610 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff88801d879701 flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffefff(slab) raw: 00fff00000000040 ffff88801a824780 dead000000000122 0000000000000000 raw: 0000000000000000 0000000080130013 00000001ffffefff ffff88801d879701 head: 00fff00000000040 ffff88801a824780 dead000000000122 0000000000000000 head: 0000000000000000 0000000080130013 00000001ffffefff ffff88801d879701 head: 00fff00000000003 ffffea0001218401 ffffffffffffffff 0000000000000000 head: ffff888000000008 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Reclaimable, gfp_mask 0x1d2050(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 5921, tgid 5920 (syz-executor.1), ts 80330288288, free_ts 75951829280 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1468 prep_new_page mm/page_alloc.c:1476 [inline] get_page_from_freelist+0x136a/0x2e50 mm/page_alloc.c:3420 __alloc_pages_noprof+0x22b/0x2460 mm/page_alloc.c:4678 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] alloc_slab_page+0x56/0x110 mm/slub.c:2265 allocate_slab mm/slub.c:2428 [inline] new_slab+0x84/0x260 mm/slub.c:2481 ___slab_alloc+0xdac/0x1870 mm/slub.c:3667 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3757 __slab_alloc_node mm/slub.c:3810 [inline] slab_alloc_node mm/slub.c:3989 [inline] kmem_cache_alloc_lru_noprof+0x2a0/0x2f0 mm/slub.c:4020 nilfs_alloc_inode+0x26/0x150 fs/nilfs2/super.c:154 alloc_inode+0x5d/0x230 fs/inode.c:261 new_inode_pseudo fs/inode.c:1007 [inline] new_inode+0x22/0x270 fs/inode.c:1033 nilfs_new_inode+0xe0/0x8e0 fs/nilfs2/inode.c:336 nilfs_create fs/nilfs2/namei.c:85 [inline] nilfs_create+0x121/0x320 fs/nilfs2/namei.c:75 lookup_open.isra.0+0x10a1/0x13c0 fs/namei.c:3505 open_last_lookups fs/namei.c:3574 [inline] path_openat+0x92f/0x29f0 fs/namei.c:3804 do_filp_open+0x1dc/0x430 fs/namei.c:3834 page last free pid 4689 tgid 4689 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1088 [inline] free_unref_page+0x64a/0xe40 mm/page_alloc.c:2583 __put_partials+0x14c/0x170 mm/slub.c:2995 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x4e/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x192/0x1e0 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:322 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3941 [inline] slab_alloc_node mm/slub.c:4001 [inline] kmem_cache_alloc_noprof+0x121/0x2f0 mm/slub.c:4008 getname_flags.part.0+0x50/0x4f0 fs/namei.c:139 getname_flags+0x9b/0xf0 include/linux/audit.h:322 user_path_at_empty+0x2c/0x60 fs/namei.c:2928 do_readlinkat+0xdd/0x310 fs/stat.c:499 __do_sys_readlink fs/stat.c:532 [inline] __se_sys_readlink fs/stat.c:529 [inline] __x64_sys_readlink+0x78/0xc0 fs/stat.c:529 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff888048611680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888048611700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888048611780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888048611800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888048611880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== --- 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 report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title 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