usb 6-1: USB disconnect, device number 62 cdc_ncm 6-1:1.0 usb0: unregister 'cdc_ncm' usb-dummy_hcd.5-1, CDC NCM ================================================================== BUG: KASAN: use-after-free in __lock_acquire+0xda/0x2b00 kernel/locking/lockdep.c:4897 Read of size 8 at addr ffff888074d6ecf0 by task kworker/0:13/10874 CPU: 0 PID: 10874 Comm: kworker/0:13 Not tainted 5.17.0-rc7-syzkaller-00227-g68453767131a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: usb_hub_wq hub_event Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1dc/0x2d8 lib/dump_stack.c:106 print_address_description+0x65/0x3a0 mm/kasan/report.c:255 __kasan_report mm/kasan/report.c:442 [inline] kasan_report+0x19a/0x1f0 mm/kasan/report.c:459 __lock_acquire+0xda/0x2b00 kernel/locking/lockdep.c:4897 lock_acquire+0x19f/0x4d0 kernel/locking/lockdep.c:5639 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x31/0x40 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:354 [inline] cdc_ncm_tx_fixup+0x58/0xf0 drivers/net/usb/cdc_ncm.c:1527 usbnet_start_xmit+0x13a/0x1f70 drivers/net/usb/usbnet.c:1372 __netdev_start_xmit include/linux/netdevice.h:4685 [inline] netdev_start_xmit include/linux/netdevice.h:4699 [inline] xmit_one net/core/dev.c:3473 [inline] dev_hard_start_xmit+0x20b/0x450 net/core/dev.c:3489 sch_direct_xmit+0x292/0x5b0 net/sched/sch_generic.c:342 __dev_xmit_skb net/core/dev.c:3700 [inline] __dev_queue_xmit+0x1974/0x36b0 net/core/dev.c:4081 lapb_data_transmit+0x85/0xa0 net/lapb/lapb_iface.c:447 lapb_transmit_buffer+0x1d8/0x270 net/lapb/lapb_out.c:149 __lapb_disconnect_request+0x8a/0x180 net/lapb/lapb_iface.c:326 lapb_device_event+0x30f/0x560 net/lapb/lapb_iface.c:492 notifier_call_chain kernel/notifier.c:84 [inline] raw_notifier_call_chain+0xe7/0x170 kernel/notifier.c:392 call_netdevice_notifiers_info net/core/dev.c:1919 [inline] call_netdevice_notifiers_extack net/core/dev.c:1931 [inline] call_netdevice_notifiers net/core/dev.c:1945 [inline] __dev_close_many+0x1eb/0x3e0 net/core/dev.c:1465 dev_close_many+0x238/0x540 net/core/dev.c:1516 dev_close+0x1b1/0x2b0 net/core/dev.c:1542 lapbeth_device_event+0x297/0x930 drivers/net/wan/lapbether.c:462 notifier_call_chain kernel/notifier.c:84 [inline] raw_notifier_call_chain+0xe7/0x170 kernel/notifier.c:392 call_netdevice_notifiers_info net/core/dev.c:1919 [inline] call_netdevice_notifiers_extack net/core/dev.c:1931 [inline] call_netdevice_notifiers net/core/dev.c:1945 [inline] __dev_close_many+0x1eb/0x3e0 net/core/dev.c:1465 dev_close_many+0x238/0x540 net/core/dev.c:1516 unregister_netdevice_many+0x53a/0x19e0 net/core/dev.c:10392 unregister_netdevice_queue net/core/dev.c:10349 [inline] unregister_netdevice include/linux/netdevice.h:2902 [inline] unregister_netdev+0x19b/0x210 net/core/dev.c:10474 usbnet_disconnect+0x14c/0x340 drivers/net/usb/usbnet.c:1623 usb_unbind_interface+0x1f2/0x860 drivers/usb/core/driver.c:458 __device_release_driver drivers/base/dd.c:1209 [inline] device_release_driver_internal+0x526/0x810 drivers/base/dd.c:1242 bus_remove_device+0x2fd/0x410 drivers/base/bus.c:529 device_del+0x6f1/0xbf0 drivers/base/core.c:3592 usb_disable_device+0x407/0x800 drivers/usb/core/message.c:1419 usb_disconnect+0x33a/0x8a0 drivers/usb/core/hub.c:2228 hub_port_connect+0x29c/0x2910 drivers/usb/core/hub.c:5202 hub_port_connect_change+0x5f9/0xc20 drivers/usb/core/hub.c:5502 port_event+0xca0/0x13e0 drivers/usb/core/hub.c:5660 hub_event+0x4ed/0xe40 drivers/usb/core/hub.c:5742 process_one_work+0x86c/0x1190 kernel/workqueue.c:2307 worker_thread+0xab1/0x1300 kernel/workqueue.c:2454 kthread+0x2a3/0x2d0 kernel/kthread.c:377 ret_from_fork+0x1f/0x30 Allocated by task 11082: 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:436 [inline] ____kasan_kmalloc+0xdc/0x110 mm/kasan/common.c:515 kasan_kmalloc include/linux/kasan.h:270 [inline] kmem_cache_alloc_trace+0x9d/0x330 mm/slub.c:3257 kmalloc include/linux/slab.h:581 [inline] kzalloc include/linux/slab.h:714 [inline] cdc_ncm_bind_common+0xda/0x1900 drivers/net/usb/cdc_ncm.c:826 usbnet_probe+0xaa3/0x20e0 drivers/net/usb/usbnet.c:1747 usb_probe_interface+0x633/0xb40 drivers/usb/core/driver.c:396 call_driver_probe+0x96/0x250 really_probe+0x222/0x9f0 drivers/base/dd.c:596 __driver_probe_device+0x1f8/0x3e0 drivers/base/dd.c:755 driver_probe_device+0x50/0x240 drivers/base/dd.c:785 __device_attach_driver+0x1e1/0x3b0 drivers/base/dd.c:902 bus_for_each_drv+0x18a/0x210 drivers/base/bus.c:427 __device_attach+0x310/0x560 drivers/base/dd.c:973 bus_probe_device+0xb8/0x1f0 drivers/base/bus.c:487 device_add+0x11c8/0x16d0 drivers/base/core.c:3405 usb_set_configuration+0x1a86/0x2100 drivers/usb/core/message.c:2170 usb_generic_driver_probe+0x83/0x140 drivers/usb/core/generic.c:238 usb_probe_device+0x13a/0x260 drivers/usb/core/driver.c:293 call_driver_probe+0x96/0x250 really_probe+0x222/0x9f0 drivers/base/dd.c:596 __driver_probe_device+0x1f8/0x3e0 drivers/base/dd.c:755 driver_probe_device+0x50/0x240 drivers/base/dd.c:785 __device_attach_driver+0x1e1/0x3b0 drivers/base/dd.c:902 bus_for_each_drv+0x18a/0x210 drivers/base/bus.c:427 __device_attach+0x310/0x560 drivers/base/dd.c:973 bus_probe_device+0xb8/0x1f0 drivers/base/bus.c:487 device_add+0x11c8/0x16d0 drivers/base/core.c:3405 usb_new_device+0x108a/0x1940 drivers/usb/core/hub.c:2566 hub_port_connect+0x100b/0x2910 drivers/usb/core/hub.c:5358 hub_port_connect_change+0x5f9/0xc20 drivers/usb/core/hub.c:5502 port_event+0xca0/0x13e0 drivers/usb/core/hub.c:5660 hub_event+0x4ed/0xe40 drivers/usb/core/hub.c:5742 process_one_work+0x86c/0x1190 kernel/workqueue.c:2307 worker_thread+0xab1/0x1300 kernel/workqueue.c:2454 kthread+0x2a3/0x2d0 kernel/kthread.c:377 ret_from_fork+0x1f/0x30 Freed by task 10874: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4c/0x70 mm/kasan/common.c:45 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:370 ____kasan_slab_free+0x126/0x180 mm/kasan/common.c:366 kasan_slab_free include/linux/kasan.h:236 [inline] slab_free_hook mm/slub.c:1728 [inline] slab_free_freelist_hook+0x12e/0x1a0 mm/slub.c:1754 slab_free mm/slub.c:3509 [inline] kfree+0xb8/0x2e0 mm/slub.c:4562 usbnet_disconnect+0x106/0x340 drivers/net/usb/usbnet.c:1620 usb_unbind_interface+0x1f2/0x860 drivers/usb/core/driver.c:458 __device_release_driver drivers/base/dd.c:1209 [inline] device_release_driver_internal+0x526/0x810 drivers/base/dd.c:1242 bus_remove_device+0x2fd/0x410 drivers/base/bus.c:529 device_del+0x6f1/0xbf0 drivers/base/core.c:3592 usb_disable_device+0x407/0x800 drivers/usb/core/message.c:1419 usb_disconnect+0x33a/0x8a0 drivers/usb/core/hub.c:2228 hub_port_connect+0x29c/0x2910 drivers/usb/core/hub.c:5202 hub_port_connect_change+0x5f9/0xc20 drivers/usb/core/hub.c:5502 port_event+0xca0/0x13e0 drivers/usb/core/hub.c:5660 hub_event+0x4ed/0xe40 drivers/usb/core/hub.c:5742 process_one_work+0x86c/0x1190 kernel/workqueue.c:2307 worker_thread+0xab1/0x1300 kernel/workqueue.c:2454 kthread+0x2a3/0x2d0 kernel/kthread.c:377 ret_from_fork+0x1f/0x30 Last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xb2/0xc0 mm/kasan/generic.c:348 kvfree_call_rcu+0x119/0x880 kernel/rcu/tree.c:3591 ma_put net/ipv6/mcast.c:869 [inline] ipv6_mc_destroy_dev+0x3d4/0x6a0 net/ipv6/mcast.c:2808 addrconf_ifdown+0x1569/0x1a00 net/ipv6/addrconf.c:3877 addrconf_notify+0x49d/0x2110 notifier_call_chain kernel/notifier.c:84 [inline] raw_notifier_call_chain+0xe7/0x170 kernel/notifier.c:392 call_netdevice_notifiers_info net/core/dev.c:1919 [inline] call_netdevice_notifiers_extack net/core/dev.c:1931 [inline] call_netdevice_notifiers net/core/dev.c:1945 [inline] unregister_netdevice_many+0xfae/0x19e0 net/core/dev.c:10415 unregister_netdevice_queue+0x2e6/0x350 net/core/dev.c:10349 unregister_netdevice include/linux/netdevice.h:2902 [inline] __tun_detach+0x642/0x1d40 drivers/net/tun.c:676 tun_detach drivers/net/tun.c:693 [inline] tun_chr_close+0xed/0x130 drivers/net/tun.c:3405 __fput+0x3fc/0x870 fs/file_table.c:317 task_work_run+0x146/0x1c0 kernel/task_work.c:164 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:175 [inline] exit_to_user_mode_prepare+0x209/0x220 kernel/entry/common.c:207 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline] syscall_exit_to_user_mode+0x2e/0x70 kernel/entry/common.c:300 do_syscall_64+0x53/0xd0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae The buggy address belongs to the object at ffff888074d6ec00 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 240 bytes inside of 512-byte region [ffff888074d6ec00, ffff888074d6ee00) The buggy address belongs to the page: page:ffffea0001d35b00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888074d6c400 pfn:0x74d6c head:ffffea0001d35b00 order:2 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffffea0000680908 ffffea0001f89308 ffff888011441c80 raw: ffff888074d6c400 000000000010000f 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd2a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 19, ts 149323184454, free_ts 149254195459 prep_new_page mm/page_alloc.c:2434 [inline] get_page_from_freelist+0x729/0x9e0 mm/page_alloc.c:4165 __alloc_pages+0x255/0x580 mm/page_alloc.c:5389 alloc_slab_page mm/slub.c:1799 [inline] allocate_slab+0xce/0x3f0 mm/slub.c:1944 new_slab mm/slub.c:2004 [inline] ___slab_alloc+0x3fe/0xc30 mm/slub.c:3018 __slab_alloc mm/slub.c:3105 [inline] slab_alloc_node mm/slub.c:3196 [inline] __kmalloc_node_track_caller+0x2df/0x400 mm/slub.c:4957 kmalloc_reserve net/core/skbuff.c:354 [inline] __alloc_skb+0x127/0x5a0 net/core/skbuff.c:426 __napi_alloc_skb+0x155/0x2d0 net/core/skbuff.c:568 napi_alloc_skb include/linux/skbuff.h:3005 [inline] page_to_skb+0x27f/0xcc0 drivers/net/virtio_net.c:437 receive_mergeable+0x310/0x3b30 drivers/net/virtio_net.c:1039 receive_buf+0x159/0x1f20 drivers/net/virtio_net.c:1149 virtnet_receive drivers/net/virtio_net.c:1441 [inline] virtnet_poll+0x5ed/0x11c0 drivers/net/virtio_net.c:1550 __napi_poll+0xbd/0x520 net/core/dev.c:6365 napi_poll net/core/dev.c:6432 [inline] net_rx_action+0x61c/0xf30 net/core/dev.c:6519 __do_softirq+0x392/0x7a3 kernel/softirq.c:558 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1352 [inline] free_pcp_prepare+0xd1c/0xe00 mm/page_alloc.c:1404 free_unref_page_prepare mm/page_alloc.c:3325 [inline] free_unref_page+0x7d/0x580 mm/page_alloc.c:3404 free_slab mm/slub.c:2043 [inline] discard_slab mm/slub.c:2049 [inline] __unfreeze_partials+0x1ab/0x200 mm/slub.c:2536 put_cpu_partial+0x116/0x180 mm/slub.c:2612 do_slab_free mm/slub.c:3497 [inline] ___cache_free+0x107/0x160 mm/slub.c:3516 qlist_free_all mm/kasan/quarantine.c:176 [inline] kasan_quarantine_reduce+0x169/0x1f0 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:446 kasan_slab_alloc include/linux/kasan.h:260 [inline] slab_post_alloc_hook mm/slab.h:732 [inline] slab_alloc_node mm/slub.c:3230 [inline] kmem_cache_alloc_node+0x201/0x370 mm/slub.c:3266 __alloc_skb+0xd8/0x5a0 net/core/skbuff.c:414 alloc_skb_fclone include/linux/skbuff.h:1208 [inline] tcp_stream_alloc_skb+0x67/0x850 net/ipv4/tcp.c:862 tcp_sendmsg_locked+0xdc7/0x4820 net/ipv4/tcp.c:1298 tcp_sendmsg+0x2c/0x40 net/ipv4/tcp.c:1449 sock_sendmsg_nosec net/socket.c:705 [inline] sock_sendmsg net/socket.c:725 [inline] sock_write_iter+0x37c/0x4e0 net/socket.c:1061 call_write_iter include/linux/fs.h:2074 [inline] new_sync_write fs/read_write.c:503 [inline] vfs_write+0xb11/0xe90 fs/read_write.c:590 ksys_write+0x18f/0x2c0 fs/read_write.c:643 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 Memory state around the buggy address: ffff888074d6eb80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888074d6ec00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888074d6ec80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888074d6ed00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888074d6ed80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================