loop1: detected capacity change from 0 to 2048 ================================================================== BUG: KASAN: use-after-free in nilfs_mdt_destroy+0x4f/0x70 fs/nilfs2/mdt.c:497 Read of size 8 at addr ffff888078885a98 by task syz-executor.1/13644 CPU: 1 PID: 13644 Comm: syz-executor.1 Not tainted 6.0.0-syzkaller-02734-g0326074ff465 #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 nilfs_mdt_destroy+0x4f/0x70 fs/nilfs2/mdt.c:497 nilfs_free_inode+0x44/0x70 fs/nilfs2/super.c:168 i_callback fs/inode.c:249 [inline] alloc_inode fs/inode.c:274 [inline] iget5_locked+0x23d/0x270 fs/inode.c:1242 nilfs_iget_locked fs/nilfs2/inode.c:588 [inline] nilfs_iget+0x162/0x8b0 fs/nilfs2/inode.c:597 nilfs_lookup+0xca/0x110 fs/nilfs2/namei.c:63 __lookup_slow+0x266/0x3a0 fs/namei.c:1685 lookup_slow+0x53/0x70 fs/namei.c:1702 walk_component fs/namei.c:1993 [inline] link_path_walk+0xa06/0xf00 fs/namei.c:2320 path_parentat fs/namei.c:2521 [inline] filename_parentat+0x274/0x6c0 fs/namei.c:2544 do_renameat2+0x2b5/0x1370 fs/namei.c:4820 __do_sys_rename fs/namei.c:4953 [inline] __se_sys_rename fs/namei.c:4951 [inline] __x64_sys_rename+0x82/0x90 fs/namei.c:4951 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 RIP: 0033:0x7fe8d9e8a5a9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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:00007fe8db0d4168 EFLAGS: 00000246 ORIG_RAX: 0000000000000052 RAX: ffffffffffffffda RBX: 00007fe8d9fabf80 RCX: 00007fe8d9e8a5a9 RDX: 0000000000000000 RSI: 00000000200007c0 RDI: 0000000020000180 RBP: 00007fe8db0d41d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffc93f00f3f R14: 00007fe8db0d4300 R15: 0000000000022000 Allocated by task 13638: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:437 [inline] ____kasan_kmalloc+0xcd/0x100 mm/kasan/common.c:516 kasan_kmalloc include/linux/kasan.h:234 [inline] __kmalloc+0x226/0x370 mm/slub.c:4429 kmalloc_array include/linux/slab.h:640 [inline] kcalloc include/linux/slab.h:671 [inline] __list_lru_init+0xa0/0x5f0 mm/list_lru.c:571 alloc_super+0x778/0x920 fs/super.c:270 sget+0x20e/0x560 fs/super.c:642 nilfs_mount+0x49d/0x9b0 fs/nilfs2/super.c:1301 legacy_get_tree+0xea/0x180 fs/fs_context.c:610 vfs_get_tree+0x88/0x270 fs/super.c:1530 do_new_mount+0x289/0xad0 fs/namespace.c:3040 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount+0x2d3/0x3c0 fs/namespace.c:3568 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 Freed by task 4816: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x3d/0x60 mm/kasan/common.c:45 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:370 ____kasan_slab_free+0xd8/0x120 mm/kasan/common.c:367 kasan_slab_free include/linux/kasan.h:200 [inline] slab_free_hook mm/slub.c:1759 [inline] slab_free_freelist_hook+0x12e/0x1a0 mm/slub.c:1785 slab_free mm/slub.c:3539 [inline] kfree+0xda/0x210 mm/slub.c:4567 list_lru_destroy+0x752/0x830 mm/list_lru.c:598 deactivate_locked_super+0xb3/0xf0 fs/super.c:338 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 Last potentially related work creation: kasan_save_stack+0x2b/0x50 mm/kasan/common.c:38 __kasan_record_aux_stack+0xaf/0xc0 mm/kasan/generic.c:348 kvfree_call_rcu+0x112/0x880 kernel/rcu/tree.c:3341 drop_sysctl_table+0x307/0x480 fs/proc/proc_sysctl.c:1716 drop_sysctl_table+0x319/0x480 fs/proc/proc_sysctl.c:1719 unregister_sysctl_table+0x87/0x140 fs/proc/proc_sysctl.c:1754 __devinet_sysctl_unregister net/ipv4/devinet.c:2609 [inline] devinet_sysctl_unregister net/ipv4/devinet.c:2637 [inline] inetdev_event+0xdc6/0x14a0 net/ipv4/devinet.c:1610 notifier_call_chain kernel/notifier.c:87 [inline] raw_notifier_call_chain+0xe7/0x170 kernel/notifier.c:455 call_netdevice_notifiers_info net/core/dev.c:1945 [inline] call_netdevice_notifiers_extack net/core/dev.c:1983 [inline] call_netdevice_notifiers net/core/dev.c:1997 [inline] dev_change_name+0x695/0x990 net/core/dev.c:1226 do_setlink+0xa73/0x3d40 net/core/rtnetlink.c:2761 __rtnl_newlink net/core/rtnetlink.c:3547 [inline] rtnl_newlink+0x1748/0x1fa0 net/core/rtnetlink.c:3594 rtnetlink_rcv_msg+0x772/0xe60 net/core/rtnetlink.c:6091 netlink_rcv_skb+0x1f0/0x460 net/netlink/af_netlink.c:2540 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0x7e7/0x9c0 net/netlink/af_netlink.c:1345 netlink_sendmsg+0x9b3/0xcd0 net/netlink/af_netlink.c:1921 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg net/socket.c:734 [inline] __sys_sendto+0x46e/0x5f0 net/socket.c:2117 __do_sys_sendto net/socket.c:2129 [inline] __se_sys_sendto net/socket.c:2125 [inline] __x64_sys_sendto+0xda/0xf0 net/socket.c:2125 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 Second to last potentially related work creation: kasan_save_stack+0x2b/0x50 mm/kasan/common.c:38 __kasan_record_aux_stack+0xaf/0xc0 mm/kasan/generic.c:348 call_rcu+0x163/0x970 kernel/rcu/tree.c:2796 team_vlan_rx_kill_vid+0x95/0xe0 drivers/net/team/team.c:1929 vlan_kill_rx_filter_info net/8021q/vlan_core.c:222 [inline] __vlan_vid_del net/8021q/vlan_core.c:362 [inline] vlan_vid_del+0x46e/0x750 net/8021q/vlan_core.c:387 vlan_device_event+0x263/0x1c90 net/8021q/vlan.c:389 notifier_call_chain kernel/notifier.c:87 [inline] raw_notifier_call_chain+0xe7/0x170 kernel/notifier.c:455 call_netdevice_notifiers_info net/core/dev.c:1945 [inline] call_netdevice_notifiers_extack net/core/dev.c:1983 [inline] call_netdevice_notifiers net/core/dev.c:1997 [inline] dev_close_many+0x3fb/0x5d0 net/core/dev.c:1545 unregister_netdevice_many+0x521/0x1aa0 net/core/dev.c:10817 default_device_exit_batch+0x570/0x5e0 net/core/dev.c:11337 ops_exit_list net/core/net_namespace.c:167 [inline] cleanup_net+0x80c/0xc50 net/core/net_namespace.c:594 process_one_work+0x877/0xdb0 kernel/workqueue.c:2289 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 The buggy address belongs to the object at ffff888078885a00 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 152 bytes inside of 256-byte region [ffff888078885a00, ffff888078885b00) The buggy address belongs to the physical page: page:ffffea0001e22100 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x78884 head:ffffea0001e22100 order:1 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffffea0000988880 dead000000000005 ffff888012041b40 raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 1, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 3636, tgid 3636 (syz-executor.1), ts 184531369400, free_ts 184141895497 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 alloc_slab_page+0x70/0xf0 mm/slub.c:1829 allocate_slab+0x5e/0x520 mm/slub.c:1974 new_slab mm/slub.c:2034 [inline] ___slab_alloc+0x3ee/0xc40 mm/slub.c:3036 __slab_alloc mm/slub.c:3123 [inline] slab_alloc_node mm/slub.c:3214 [inline] slab_alloc mm/slub.c:3256 [inline] __kmalloc+0x2bd/0x370 mm/slub.c:4425 kmalloc include/linux/slab.h:605 [inline] kzalloc include/linux/slab.h:733 [inline] fib_create_info+0xa5a/0x2410 net/ipv4/fib_semantics.c:1449 fib_table_insert+0x1e5/0x1f50 net/ipv4/fib_trie.c:1236 fib_magic+0x451/0x650 net/ipv4/fib_frontend.c:1098 fib_add_ifaddr+0x3ea/0x5c0 net/ipv4/fib_frontend.c:1142 fib_netdev_event+0x628/0x740 net/ipv4/fib_frontend.c:1480 notifier_call_chain kernel/notifier.c:87 [inline] raw_notifier_call_chain+0xe7/0x170 kernel/notifier.c:455 __dev_notify_flags+0x2ef/0x5d0 dev_change_flags+0xe3/0x190 net/core/dev.c:8615 do_setlink+0xef5/0x3d40 net/core/rtnetlink.c:2788 __rtnl_newlink net/core/rtnetlink.c:3547 [inline] rtnl_newlink+0x1748/0x1fa0 net/core/rtnetlink.c:3594 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+0x7d/0x5f0 mm/page_alloc.c:3476 qlist_free_all+0x2b/0x70 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x169/0x180 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x2f/0xd0 mm/kasan/common.c:447 kasan_slab_alloc include/linux/kasan.h:224 [inline] slab_post_alloc_hook mm/slab.h:727 [inline] slab_alloc_node mm/slub.c:3248 [inline] slab_alloc mm/slub.c:3256 [inline] __kmalloc_track_caller+0x1bb/0x370 mm/slub.c:4931 kstrdup+0x31/0x70 mm/util.c:61 device_rename+0xac/0x1a0 drivers/base/core.c:4358 dev_change_name+0x2b6/0x990 net/core/dev.c:1204 do_setlink+0xa73/0x3d40 net/core/rtnetlink.c:2761 __rtnl_newlink net/core/rtnetlink.c:3547 [inline] rtnl_newlink+0x1748/0x1fa0 net/core/rtnetlink.c:3594 rtnetlink_rcv_msg+0x772/0xe60 net/core/rtnetlink.c:6091 netlink_rcv_skb+0x1f0/0x460 net/netlink/af_netlink.c:2540 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0x7e7/0x9c0 net/netlink/af_netlink.c:1345 netlink_sendmsg+0x9b3/0xcd0 net/netlink/af_netlink.c:1921 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg net/socket.c:734 [inline] __sys_sendto+0x46e/0x5f0 net/socket.c:2117 Memory state around the buggy address: ffff888078885980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888078885a00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888078885a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888078885b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888078885b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================