cdc_ncm 4-1:1.0 usb0: unregister 'cdc_ncm' usb-dummy_hcd.3-1, CDC NCM ================================================================== BUG: KASAN: use-after-free in __lock_acquire+0x3eb0/0x56c0 kernel/locking/lockdep.c:4899 Read of size 8 at addr ffff88801a0d04f0 by task kworker/1:0/22 CPU: 1 PID: 22 Comm: kworker/1:0 Not tainted 5.18.0-rc1-syzkaller-00290-gf1b45d8ccb98 #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+0xcd/0x134 lib/dump_stack.c:106 print_address_description.constprop.0.cold+0xeb/0x495 mm/kasan/report.c:313 print_report mm/kasan/report.c:429 [inline] kasan_report.cold+0xf4/0x1c6 mm/kasan/report.c:491 __lock_acquire+0x3eb0/0x56c0 kernel/locking/lockdep.c:4899 lock_acquire kernel/locking/lockdep.c:5641 [inline] lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5606 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:354 [inline] cdc_ncm_tx_fixup+0x8f/0x120 drivers/net/usb/cdc_ncm.c:1527 usbnet_start_xmit+0x152/0x1f70 drivers/net/usb/usbnet.c:1372 __netdev_start_xmit include/linux/netdevice.h:4778 [inline] netdev_start_xmit include/linux/netdevice.h:4792 [inline] xmit_one net/core/dev.c:3532 [inline] dev_hard_start_xmit+0x1eb/0x920 net/core/dev.c:3548 sch_direct_xmit+0x19f/0xbe0 net/sched/sch_generic.c:342 __dev_xmit_skb net/core/dev.c:3759 [inline] __dev_queue_xmit+0x153b/0x39c0 net/core/dev.c:4141 lapb_data_transmit+0x8f/0xc0 net/lapb/lapb_iface.c:447 lapb_transmit_buffer+0x183/0x390 net/lapb/lapb_out.c:149 lapb_send_control+0x1c7/0x370 net/lapb/lapb_subr.c:251 __lapb_disconnect_request+0x127/0x1a0 net/lapb/lapb_iface.c:326 lapb_device_event+0x292/0x560 net/lapb/lapb_iface.c:492 notifier_call_chain+0xb5/0x200 kernel/notifier.c:84 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1938 call_netdevice_notifiers_extack net/core/dev.c:1976 [inline] call_netdevice_notifiers net/core/dev.c:1990 [inline] __dev_close_many+0xf1/0x2e0 net/core/dev.c:1483 dev_close_many+0x22c/0x620 net/core/dev.c:1534 dev_close net/core/dev.c:1560 [inline] dev_close+0x16d/0x210 net/core/dev.c:1554 lapbeth_device_event+0x696/0xc40 drivers/net/wan/lapbether.c:462 notifier_call_chain+0xb5/0x200 kernel/notifier.c:84 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1938 call_netdevice_notifiers_extack net/core/dev.c:1976 [inline] call_netdevice_notifiers net/core/dev.c:1990 [inline] __dev_close_many+0xf1/0x2e0 net/core/dev.c:1483 dev_close_many+0x22c/0x620 net/core/dev.c:1534 unregister_netdevice_many+0x3ff/0x1890 net/core/dev.c:10726 unregister_netdevice_queue net/core/dev.c:10683 [inline] unregister_netdevice_queue+0x2dd/0x3c0 net/core/dev.c:10673 unregister_netdevice include/linux/netdevice.h:2954 [inline] unregister_netdev+0x18/0x20 net/core/dev.c:10810 usbnet_disconnect+0x139/0x270 drivers/net/usb/usbnet.c:1623 usb_unbind_interface+0x1d8/0x8e0 drivers/usb/core/driver.c:458 device_remove drivers/base/dd.c:531 [inline] device_remove+0x11f/0x170 drivers/base/dd.c:523 __device_release_driver drivers/base/dd.c:1199 [inline] device_release_driver_internal+0x4a3/0x680 drivers/base/dd.c:1222 bus_remove_device+0x2eb/0x5a0 drivers/base/bus.c:529 device_del+0x4f3/0xc80 drivers/base/core.c:3592 usb_disable_device+0x35b/0x7b0 drivers/usb/core/message.c:1419 usb_disconnect.cold+0x278/0x6ec drivers/usb/core/hub.c:2228 hub_port_connect drivers/usb/core/hub.c:5207 [inline] hub_port_connect_change drivers/usb/core/hub.c:5507 [inline] port_event drivers/usb/core/hub.c:5665 [inline] hub_event+0x1e74/0x4680 drivers/usb/core/hub.c:5747 process_one_work+0x996/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 Allocated by task 142: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:436 [inline] ____kasan_kmalloc mm/kasan/common.c:515 [inline] ____kasan_kmalloc mm/kasan/common.c:474 [inline] __kasan_kmalloc+0xa9/0xd0 mm/kasan/common.c:524 kmalloc include/linux/slab.h:581 [inline] kzalloc include/linux/slab.h:714 [inline] cdc_ncm_bind_common+0xb8/0x2df0 drivers/net/usb/cdc_ncm.c:826 cdc_ncm_bind+0x7c/0x1c0 drivers/net/usb/cdc_ncm.c:1069 usbnet_probe+0xaf8/0x2580 drivers/net/usb/usbnet.c:1747 usb_probe_interface+0x315/0x7f0 drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:541 [inline] really_probe+0x23e/0xb20 drivers/base/dd.c:620 __driver_probe_device+0x338/0x4d0 drivers/base/dd.c:751 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:781 __device_attach_driver+0x20b/0x2f0 drivers/base/dd.c:898 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:427 __device_attach+0x228/0x4a0 drivers/base/dd.c:969 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:487 device_add+0xb83/0x1e20 drivers/base/core.c:3405 usb_set_configuration+0x101e/0x1900 drivers/usb/core/message.c:2170 usb_generic_driver_probe+0xba/0x100 drivers/usb/core/generic.c:238 usb_probe_device+0xd9/0x2c0 drivers/usb/core/driver.c:293 call_driver_probe drivers/base/dd.c:541 [inline] really_probe+0x23e/0xb20 drivers/base/dd.c:620 __driver_probe_device+0x338/0x4d0 drivers/base/dd.c:751 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:781 __device_attach_driver+0x20b/0x2f0 drivers/base/dd.c:898 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:427 __device_attach+0x228/0x4a0 drivers/base/dd.c:969 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:487 device_add+0xb83/0x1e20 drivers/base/core.c:3405 usb_new_device.cold+0x641/0x1091 drivers/usb/core/hub.c:2566 hub_port_connect drivers/usb/core/hub.c:5363 [inline] hub_port_connect_change drivers/usb/core/hub.c:5507 [inline] port_event drivers/usb/core/hub.c:5665 [inline] hub_event+0x25c6/0x4680 drivers/usb/core/hub.c:5747 process_one_work+0x996/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 Freed by task 22: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 kasan_set_track+0x21/0x30 mm/kasan/common.c:45 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370 ____kasan_slab_free mm/kasan/common.c:366 [inline] ____kasan_slab_free+0x166/0x1a0 mm/kasan/common.c:328 kasan_slab_free include/linux/kasan.h:200 [inline] slab_free_hook mm/slub.c:1728 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1754 slab_free mm/slub.c:3510 [inline] kfree+0xd6/0x4d0 mm/slub.c:4552 cdc_ncm_free+0x145/0x1a0 drivers/net/usb/cdc_ncm.c:786 cdc_ncm_unbind+0x1a7/0x340 drivers/net/usb/cdc_ncm.c:1021 usbnet_disconnect+0x103/0x270 drivers/net/usb/usbnet.c:1620 usb_unbind_interface+0x1d8/0x8e0 drivers/usb/core/driver.c:458 device_remove drivers/base/dd.c:531 [inline] device_remove+0x11f/0x170 drivers/base/dd.c:523 __device_release_driver drivers/base/dd.c:1199 [inline] device_release_driver_internal+0x4a3/0x680 drivers/base/dd.c:1222 bus_remove_device+0x2eb/0x5a0 drivers/base/bus.c:529 device_del+0x4f3/0xc80 drivers/base/core.c:3592 usb_disable_device+0x35b/0x7b0 drivers/usb/core/message.c:1419 usb_disconnect.cold+0x278/0x6ec drivers/usb/core/hub.c:2228 hub_port_connect drivers/usb/core/hub.c:5207 [inline] hub_port_connect_change drivers/usb/core/hub.c:5507 [inline] port_event drivers/usb/core/hub.c:5665 [inline] hub_event+0x1e74/0x4680 drivers/usb/core/hub.c:5747 process_one_work+0x996/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 The buggy address belongs to the object at ffff88801a0d0400 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 240 bytes inside of 512-byte region [ffff88801a0d0400, ffff88801a0d0600) The buggy address belongs to the physical page: page:ffffea0000683400 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a0d0 head:ffffea0000683400 order:2 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffffea0001fa0000 dead000000000002 ffff888010c41c80 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 282, tgid 282 (kworker/u4:0), ts 6964167666, free_ts 0 prep_new_page mm/page_alloc.c:2441 [inline] get_page_from_freelist+0xba2/0x3e00 mm/page_alloc.c:4182 __alloc_pages+0x1b2/0x500 mm/page_alloc.c:5408 alloc_pages+0x1aa/0x310 mm/mempolicy.c:2272 alloc_slab_page mm/slub.c:1799 [inline] allocate_slab+0x26c/0x3c0 mm/slub.c:1944 new_slab mm/slub.c:2004 [inline] ___slab_alloc+0x8df/0xf20 mm/slub.c:3005 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3092 slab_alloc_node mm/slub.c:3183 [inline] slab_alloc mm/slub.c:3225 [inline] kmem_cache_alloc_trace+0x310/0x3f0 mm/slub.c:3256 kmalloc include/linux/slab.h:581 [inline] kzalloc include/linux/slab.h:714 [inline] alloc_bprm+0x51/0x8f0 fs/exec.c:1506 kernel_execve+0x55/0x490 fs/exec.c:1962 call_usermodehelper_exec_async+0x2e3/0x580 kernel/umh.c:112 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 page_owner free stack trace missing Memory state around the buggy address: ffff88801a0d0380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88801a0d0400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88801a0d0480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88801a0d0500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88801a0d0580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================