IPv6: ADDRCONF(NETDEV_CHANGE): usb0: link becomes ready usb 1-1: USB disconnect, device number 117 cdc_ncm 1-1:1.0 usb0: unregister 'cdc_ncm' usb-dummy_hcd.0-1, CDC NCM ================================================================== BUG: KASAN: use-after-free in __lock_acquire+0xda/0x2b00 kernel/locking/lockdep.c:4897 Read of size 8 at addr ffff888065736cf0 by task kworker/1:6/3684 CPU: 1 PID: 3684 Comm: kworker/1:6 Not tainted 5.17.0-rc7-syzkaller-00020-gea4424be1688 #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:4683 [inline] netdev_start_xmit include/linux/netdevice.h:4697 [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 3761: 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 3684: 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 insert_work+0x54/0x400 kernel/workqueue.c:1368 __queue_work+0x97a/0xcc0 kernel/workqueue.c:1534 call_timer_fn+0xf5/0x210 kernel/time/timer.c:1421 expire_timers kernel/time/timer.c:1461 [inline] __run_timers+0x752/0x910 kernel/time/timer.c:1734 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1747 __do_softirq+0x392/0x7a3 kernel/softirq.c:558 The buggy address belongs to the object at ffff888065736c00 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 240 bytes inside of 512-byte region [ffff888065736c00, ffff888065736e00) The buggy address belongs to the page: page:ffffea000195cd00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x65734 head:ffffea000195cd00 order:2 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffffea0001fbee00 dead000000000002 ffff888011441c80 raw: 0000000000000000 0000000000100010 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 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 3631, ts 127827900271, free_ts 127800695909 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] slab_alloc mm/slub.c:3238 [inline] __kmalloc_track_caller+0x2d4/0x370 mm/slub.c:4926 kmemdup+0x21/0x50 mm/util.c:128 cache_create_net+0x2b/0x250 net/sunrpc/cache.c:1729 nfsd_idmap_init+0xdf/0x1e0 fs/nfsd/nfs4idmap.c:475 nfsd_init_net+0x45/0x340 fs/nfsd/nfsctl.c:1470 ops_init+0x313/0x430 net/core/net_namespace.c:140 setup_net+0x45b/0xb70 net/core/net_namespace.c:330 copy_net_ns+0x359/0x5c0 net/core/net_namespace.c:474 create_new_namespaces+0x4ce/0xa00 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0x11e/0x180 kernel/nsproxy.c:226 ksys_unshare+0x57d/0xb50 kernel/fork.c:3058 __do_sys_unshare kernel/fork.c:3129 [inline] __se_sys_unshare kernel/fork.c:3127 [inline] __x64_sys_unshare+0x34/0x40 kernel/fork.c:3127 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] slab_alloc mm/slub.c:3238 [inline] kmem_cache_alloc_trace+0x20b/0x330 mm/slub.c:3255 kmalloc include/linux/slab.h:581 [inline] tomoyo_print_header security/tomoyo/audit.c:156 [inline] tomoyo_init_log+0x1ab/0x1ee0 security/tomoyo/audit.c:255 tomoyo_supervisor+0x3c8/0x1300 security/tomoyo/common.c:2097 tomoyo_audit_path_log security/tomoyo/file.c:168 [inline] tomoyo_path_permission+0x248/0x370 security/tomoyo/file.c:587 tomoyo_check_open_permission+0x353/0x490 security/tomoyo/file.c:780 security_file_open+0x50/0x570 security/security.c:1638 do_dentry_open+0x350/0x1020 fs/open.c:811 do_open fs/namei.c:3476 [inline] path_openat+0x273b/0x36a0 fs/namei.c:3609 do_filp_open+0x277/0x4f0 fs/namei.c:3636 Memory state around the buggy address: ffff888065736b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888065736c00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888065736c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888065736d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888065736d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================