NILFS (loop1): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds ================================================================== BUG: KASAN: use-after-free in nilfs_test_metadata_dirty+0x39/0x210 fs/nilfs2/segment.c:813 Read of size 8 at addr ffff8880287ee830 by task segctord/8644 CPU: 1 PID: 8644 Comm: segctord Not tainted 6.0.0-syzkaller-09423-g493ffd6605b2 #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_test_metadata_dirty+0x39/0x210 fs/nilfs2/segment.c:813 nilfs_segctor_confirm+0x78/0x2d0 fs/nilfs2/segment.c:837 nilfs_segctor_construct+0x122/0x8d0 fs/nilfs2/segment.c:2374 nilfs_segctor_thread_construct fs/nilfs2/segment.c:2483 [inline] nilfs_segctor_thread+0x534/0x1180 fs/nilfs2/segment.c:2566 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Allocated by task 8643: 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] kmem_cache_alloc_trace+0x97/0x310 mm/slub.c:3289 kmalloc include/linux/slab.h:600 [inline] kzalloc include/linux/slab.h:733 [inline] nilfs_find_or_create_root+0x142/0x4f0 fs/nilfs2/the_nilfs.c:747 nilfs_attach_checkpoint+0xcd/0x4a0 fs/nilfs2/super.c:519 nilfs_fill_super+0x2e8/0x5d0 fs/nilfs2/super.c:1064 nilfs_mount+0x613/0x9b0 fs/nilfs2/super.c:1317 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 8643: 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 nilfs_evict_inode+0x253/0x3d0 fs/nilfs2/inode.c:924 evict+0x2a4/0x620 fs/inode.c:664 nilfs_new_inode+0x6b8/0x8a0 nilfs_create+0xdc/0x2d0 fs/nilfs2/namei.c:85 lookup_open fs/namei.c:3413 [inline] open_last_lookups fs/namei.c:3481 [inline] path_openat+0x12d0/0x2df0 fs/namei.c:3688 do_filp_open+0x264/0x4f0 fs/namei.c:3718 do_sys_openat2+0x124/0x4e0 fs/open.c:1310 do_sys_open fs/open.c:1326 [inline] __do_sys_creat fs/open.c:1402 [inline] __se_sys_creat fs/open.c:1396 [inline] __x64_sys_creat+0x11f/0x160 fs/open.c:1396 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 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 free_fib_info net/ipv4/fib_semantics.c:256 [inline] fib_info_put include/net/ip_fib.h:578 [inline] fib_release_info+0x654/0x720 net/ipv4/fib_semantics.c:281 fib_table_flush+0xca2/0x1310 net/ipv4/fib_trie.c:2090 fib_flush net/ipv4/fib_frontend.c:195 [inline] fib_disable_ip net/ipv4/fib_frontend.c:1420 [inline] fib_netdev_event+0x3bf/0x740 net/ipv4/fib_frontend.c:1489 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 ffff8880287ee800 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 48 bytes inside of 256-byte region [ffff8880287ee800, ffff8880287ee900) The buggy address belongs to the physical page: page:ffffea0000a1fb80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x287ee head:ffffea0000a1fb80 order:1 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffffea0001e9ad00 dead000000000003 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 3639, tgid 3639 (syz-executor.2), ts 153195533537, free_ts 152123181280 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+0x143/0x5c0 net/ipv4/fib_frontend.c:1120 fib_inetaddr_event+0x12b/0x2e0 net/ipv4/fib_frontend.c:1434 notifier_call_chain kernel/notifier.c:87 [inline] blocking_notifier_call_chain+0x108/0x1b0 kernel/notifier.c:382 __inet_insert_ifa+0xa48/0xc40 net/ipv4/devinet.c:554 inet_rtm_newaddr+0x1026/0x1910 net/ipv4/devinet.c:960 rtnetlink_rcv_msg+0x772/0xe60 net/core/rtnetlink.c:6091 netlink_rcv_skb+0x1f0/0x460 net/netlink/af_netlink.c:2540 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] kmem_cache_alloc_node+0x1cc/0x350 mm/slub.c:3298 __alloc_skb+0xcf/0x2b0 net/core/skbuff.c:497 alloc_skb include/linux/skbuff.h:1265 [inline] nlmsg_new include/net/netlink.h:964 [inline] genlmsg_new include/net/genetlink.h:420 [inline] __send_and_alloc_skb drivers/net/team/team.c:2430 [inline] team_nl_send_port_list_get+0x13b/0x7e0 drivers/net/team/team.c:2732 team_nl_send_event_port_get drivers/net/team/team.c:2877 [inline] __team_port_change_send+0x2c4/0x590 drivers/net/team/team.c:2935 __team_port_change_check drivers/net/team/team.c:2967 [inline] team_port_change_check+0x9c/0x210 drivers/net/team/team.c:2989 team_device_event+0x3c8/0x450 drivers/net/team/team.c:3018 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] netdev_state_change+0x19b/0x260 net/core/dev.c:1334 linkwatch_do_dev+0x10a/0x160 net/core/link_watch.c:168 __linkwatch_run_queue+0x474/0x730 net/core/link_watch.c:221 linkwatch_event+0x48/0x50 net/core/link_watch.c:264 Memory state around the buggy address: ffff8880287ee700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880287ee780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8880287ee800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880287ee880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880287ee900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================