Warning: Permanently added '10.128.1.54' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 20.179518][ T83] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 20.699002][ T83] usb 1-1: New USB device found, idVendor=0cf3, idProduct=9271, bcdDevice= 1.08 [ 20.708247][ T83] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 20.716298][ T83] usb 1-1: Product: syz [ 20.720516][ T83] usb 1-1: Manufacturer: syz [ 20.725088][ T83] usb 1-1: SerialNumber: syz [ 20.769935][ T83] usb 1-1: ath9k_htc: Firmware ath9k_htc/htc_9271-1.4.0.fw requested [ 21.358309][ T83] usb 1-1: ath9k_htc: Transferred FW: ath9k_htc/htc_9271-1.4.0.fw, size: 51008 executing program [ 21.761177][ T95] usb 1-1: USB disconnect, device number 2 [ 22.597121][ T83] usb 1-1: Service connection timeout for: 256 [ 22.603446][ T83] ================================================================== [ 22.611651][ T83] BUG: KASAN: use-after-free in kfree_skb+0x32/0x3d0 [ 22.622315][ T83] Read of size 4 at addr ffff8881d321ae94 by task kworker/1:2/83 [ 22.630723][ T83] [ 22.633047][ T83] CPU: 1 PID: 83 Comm: kworker/1:2 Not tainted 5.7.0-rc6-syzkaller #0 [ 22.641168][ T83] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 22.651209][ T83] Workqueue: events request_firmware_work_func [ 22.657340][ T83] Call Trace: [ 22.660610][ T83] dump_stack+0xef/0x16e [ 22.664831][ T83] print_address_description.constprop.0.cold+0xd3/0x415 [ 22.671827][ T83] ? vprintk_func+0x7d/0x113 [ 22.676409][ T83] ? kfree_skb+0x32/0x3d0 [ 22.680714][ T83] __kasan_report.cold+0x37/0x7d [ 22.685625][ T83] ? kfree_skb+0x32/0x3d0 [ 22.689950][ T83] ? kfree_skb+0x32/0x3d0 [ 22.694272][ T83] kasan_report+0x33/0x50 [ 22.698576][ T83] check_memory_region+0x173/0x1d0 [ 22.703662][ T83] kfree_skb+0x32/0x3d0 [ 22.707813][ T83] htc_connect_service.cold+0xa9/0x109 [ 22.713257][ T83] ath9k_wmi_connect+0xd2/0x1a0 [ 22.718082][ T83] ? ath9k_fatal_work+0x20/0x20 [ 22.722912][ T83] ? ath9k_hif_usb_firmware_cb.cold+0xde/0xde [ 22.728955][ T83] ? ath9k_wmi_event_tasklet+0x440/0x440 [ 22.734562][ T83] ath9k_init_htc_services.constprop.0+0xb4/0x650 [ 22.740967][ T83] ? ath9k_reg_rmw_flush+0x2d0/0x2d0 [ 22.746244][ T83] ? lockdep_init_map_waits+0x26a/0x7c0 [ 22.751781][ T83] ? __raw_spin_lock_init+0x34/0x100 [ 22.757050][ T83] ? tasklet_init+0x69/0x110 [ 22.761616][ T83] ath9k_htc_probe_device+0x25a/0x1da0 [ 22.767066][ T83] ? ath9k_init_htc_services.constprop.0+0x650/0x650 [ 22.773773][ T83] ? usb_submit_urb+0x6ed/0x1460 [ 22.778733][ T83] ? usb_free_urb.part.0+0x52/0x110 [ 22.784862][ T83] ? usb_free_urb+0x1b/0x30 [ 22.789349][ T83] ath9k_htc_hw_init+0x31/0x60 [ 22.794101][ T83] ath9k_hif_usb_firmware_cb+0x274/0x510 [ 22.799721][ T83] ? ath9k_hif_usb_resume+0x320/0x320 [ 22.805067][ T83] request_firmware_work_func+0x126/0x242 [ 22.810937][ T83] ? request_firmware_into_buf+0x90/0x90 [ 22.816550][ T83] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 22.822181][ T83] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 22.827463][ T83] ? _raw_spin_unlock_irq+0x1f/0x30 [ 22.832649][ T83] process_one_work+0x965/0x1630 [ 22.837574][ T83] ? lock_release+0x720/0x720 [ 22.842247][ T83] ? pwq_dec_nr_in_flight+0x310/0x310 [ 22.847648][ T83] ? rwlock_bug.part.0+0x90/0x90 [ 22.852626][ T83] worker_thread+0x96/0xe20 [ 22.857141][ T83] ? process_one_work+0x1630/0x1630 [ 22.862351][ T83] kthread+0x326/0x430 [ 22.866419][ T83] ? kthread_create_on_node+0xf0/0xf0 [ 22.871788][ T83] ret_from_fork+0x24/0x30 [ 22.876181][ T83] [ 22.878599][ T83] Allocated by task 83: [ 22.882741][ T83] save_stack+0x1b/0x40 [ 22.886883][ T83] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 22.892508][ T83] kmem_cache_alloc_node+0xdc/0x330 [ 22.897693][ T83] __alloc_skb+0xba/0x5a0 [ 22.902001][ T83] htc_connect_service+0x2cc/0x840 [ 22.907088][ T83] ath9k_wmi_connect+0xd2/0x1a0 [ 22.911919][ T83] ath9k_init_htc_services.constprop.0+0xb4/0x650 [ 22.928299][ T83] ath9k_htc_probe_device+0x25a/0x1da0 [ 22.933916][ T83] ath9k_htc_hw_init+0x31/0x60 [ 22.938656][ T83] ath9k_hif_usb_firmware_cb+0x274/0x510 [ 22.944266][ T83] request_firmware_work_func+0x126/0x242 [ 22.949976][ T83] process_one_work+0x965/0x1630 [ 22.955415][ T83] worker_thread+0x96/0xe20 [ 22.959896][ T83] kthread+0x326/0x430 [ 22.963942][ T83] ret_from_fork+0x24/0x30 [ 22.968330][ T83] [ 22.970635][ T83] Freed by task 374: [ 22.974508][ T83] save_stack+0x1b/0x40 [ 22.978647][ T83] __kasan_slab_free+0x117/0x160 [ 22.983568][ T83] kmem_cache_free+0x9b/0x360 [ 22.988246][ T83] kfree_skbmem+0xef/0x1b0 [ 22.992693][ T83] kfree_skb+0x102/0x3d0 [ 22.996917][ T83] ath9k_htc_txcompletion_cb+0x1f8/0x2b0 [ 23.002532][ T83] hif_usb_regout_cb+0x115/0x1c0 [ 23.007511][ T83] __usb_hcd_giveback_urb+0x29a/0x550 [ 23.012875][ T83] usb_hcd_giveback_urb+0x368/0x420 [ 23.018050][ T83] dummy_timer+0x125e/0x32b4 [ 23.022619][ T83] call_timer_fn+0x1ac/0x700 [ 23.027184][ T83] run_timer_softirq+0x5f9/0x1500 [ 23.032183][ T83] __do_softirq+0x21e/0x9aa [ 23.036664][ T83] [ 23.039925][ T83] The buggy address belongs to the object at ffff8881d321adc0 [ 23.039925][ T83] which belongs to the cache skbuff_head_cache of size 224 [ 23.054473][ T83] The buggy address is located 212 bytes inside of [ 23.054473][ T83] 224-byte region [ffff8881d321adc0, ffff8881d321aea0) [ 23.067715][ T83] The buggy address belongs to the page: [ 23.073327][ T83] page:ffffea00074c8680 refcount:1 mapcount:0 mapping:00000000ab52091f index:0x0 [ 23.082423][ T83] flags: 0x200000000000200(slab) [ 23.087338][ T83] raw: 0200000000000200 dead000000000100 dead000000000122 ffff8881da175400 [ 23.095912][ T83] raw: 0000000000000000 00000000000c000c 00000001ffffffff 0000000000000000 [ 23.104487][ T83] page dumped because: kasan: bad access detected [ 23.110870][ T83] [ 23.113173][ T83] Memory state around the buggy address: [ 23.118803][ T83] ffff8881d321ad80: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb [ 23.126856][ T83] ffff8881d321ae00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.134979][ T83] >ffff8881d321ae80: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc [ 23.143011][ T83] ^ [ 23.147592][ T83] ffff8881d321af00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 23.155627][ T83] ffff8881d321af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 23.163676][ T83] ================================================================== [ 23.171707][ T83] Disabling lock debugging due to kernel taint [ 23.177902][ T83] Kernel panic - not syncing: panic_on_warn set ... [ 23.185466][ T83] CPU: 1 PID: 83 Comm: kworker/1:2 Tainted: G B 5.7.0-rc6-syzkaller #0 [ 23.194997][ T83] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 23.206004][ T83] Workqueue: events request_firmware_work_func [ 23.212143][ T83] Call Trace: [ 23.216192][ T83] dump_stack+0xef/0x16e [ 23.220420][ T83] panic+0x2aa/0x6e1 [ 23.224287][ T83] ? add_taint.cold+0x16/0x16 [ 23.228953][ T83] ? retint_kernel+0x10/0x10 [ 23.233610][ T83] ? kfree_skb+0x32/0x3d0 [ 23.239918][ T83] ? trace_hardirqs_on+0x55/0x200 [ 23.244922][ T83] ? kfree_skb+0x32/0x3d0 [ 23.249271][ T83] end_report+0x4d/0x53 [ 23.253411][ T83] __kasan_report.cold+0x72/0x7d [ 23.258438][ T83] ? kfree_skb+0x32/0x3d0 [ 23.262747][ T83] ? kfree_skb+0x32/0x3d0 [ 23.267051][ T83] kasan_report+0x33/0x50 [ 23.271354][ T83] check_memory_region+0x173/0x1d0 [ 23.276436][ T83] kfree_skb+0x32/0x3d0 [ 23.280567][ T83] htc_connect_service.cold+0xa9/0x109 [ 23.285997][ T83] ath9k_wmi_connect+0xd2/0x1a0 [ 23.290820][ T83] ? ath9k_fatal_work+0x20/0x20 [ 23.295647][ T83] ? ath9k_hif_usb_firmware_cb.cold+0xde/0xde [ 23.301686][ T83] ? ath9k_wmi_event_tasklet+0x440/0x440 [ 23.307552][ T83] ath9k_init_htc_services.constprop.0+0xb4/0x650 [ 23.313961][ T83] ? ath9k_reg_rmw_flush+0x2d0/0x2d0 [ 23.319244][ T83] ? lockdep_init_map_waits+0x26a/0x7c0 [ 23.324772][ T83] ? __raw_spin_lock_init+0x34/0x100 [ 23.330038][ T83] ? tasklet_init+0x69/0x110 [ 23.334603][ T83] ath9k_htc_probe_device+0x25a/0x1da0 [ 23.340039][ T83] ? ath9k_init_htc_services.constprop.0+0x650/0x650 [ 23.346687][ T83] ? usb_submit_urb+0x6ed/0x1460 [ 23.351635][ T83] ? usb_free_urb.part.0+0x52/0x110 [ 23.356804][ T83] ? usb_free_urb+0x1b/0x30 [ 23.361280][ T83] ath9k_htc_hw_init+0x31/0x60 [ 23.366054][ T83] ath9k_hif_usb_firmware_cb+0x274/0x510 [ 23.371664][ T83] ? ath9k_hif_usb_resume+0x320/0x320 [ 23.377011][ T83] request_firmware_work_func+0x126/0x242 [ 23.382706][ T83] ? request_firmware_into_buf+0x90/0x90 [ 23.388325][ T83] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 23.393995][ T83] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 23.399266][ T83] ? _raw_spin_unlock_irq+0x1f/0x30 [ 23.404470][ T83] process_one_work+0x965/0x1630 [ 23.409408][ T83] ? lock_release+0x720/0x720 [ 23.414069][ T83] ? pwq_dec_nr_in_flight+0x310/0x310 [ 23.419421][ T83] ? rwlock_bug.part.0+0x90/0x90 [ 23.424334][ T83] worker_thread+0x96/0xe20 [ 23.428813][ T83] ? process_one_work+0x1630/0x1630 [ 23.434004][ T83] kthread+0x326/0x430 [ 23.438064][ T83] ? kthread_create_on_node+0xf0/0xf0 [ 23.443408][ T83] ret_from_fork+0x24/0x30 [ 23.448479][ T83] Kernel Offset: disabled [ 23.452795][ T83] Rebooting in 86400 seconds..