==================================================================
BUG: KASAN: use-after-free in pn533_send_complete.cold+0x47/0x6c drivers/nfc/pn533/usb.c:430
Read of size 8 at addr ffff8881d58ae4a8 by task kworker/0:6/2760

CPU: 0 PID: 2760 Comm: kworker/0:6 Not tainted 5.4.0-rc3+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: usb_hub_wq hub_event
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0xca/0x13e lib/dump_stack.c:113
 print_address_description.constprop.0+0x36/0x50 mm/kasan/report.c:374
 __kasan_report.cold+0x1a/0x33 mm/kasan/report.c:506
 kasan_report+0xe/0x20 mm/kasan/common.c:634
 pn533_send_complete.cold+0x47/0x6c drivers/nfc/pn533/usb.c:430
 __usb_hcd_giveback_urb+0x1f2/0x470 drivers/usb/core/hcd.c:1654
 usb_hcd_giveback_urb+0x368/0x420 drivers/usb/core/hcd.c:1719
 dummy_timer+0x120f/0x2fa2 drivers/usb/gadget/udc/dummy_hcd.c:1966
 call_timer_fn+0x179/0x650 kernel/time/timer.c:1404
 expire_timers kernel/time/timer.c:1449 [inline]
 __run_timers kernel/time/timer.c:1773 [inline]
 __run_timers kernel/time/timer.c:1740 [inline]
 run_timer_softirq+0x5e3/0x1490 kernel/time/timer.c:1786
 __do_softirq+0x221/0x912 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x178/0x1a0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:536 [inline]
 smp_apic_timer_interrupt+0x12f/0x500 arch/x86/kernel/apic/apic.c:1137
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830
 </IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/irqflags.h:85 [inline]
RIP: 0010:console_unlock+0xa2a/0xc40 kernel/printk/printk.c:2481
Code: 00 89 ee 48 c7 c7 c0 59 d3 86 e8 41 b6 03 00 65 ff 0d d2 85 d9 7e e9 db f9 ff ff e8 b0 af 15 00 e8 2b dc 1a 00 ff 74 24 30 9d <e9> 18 fe ff ff e8 9c af 15 00 48 8d 7d 08 48 89 f8 48 c1 e8 03 42
RSP: 0018:ffff8881d5ad7680 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000007 RBX: 0000000000000200 RCX: 0000000000000006
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff8881d376384c
RBP: 0000000000000000 R08: ffff8881d3763000 R09: fffffbfff11ab3a5
R10: fffffbfff11ab3a4 R11: ffffffff88d59d27 R12: 0000000000000041
R13: dffffc0000000000 R14: ffffffff8293f390 R15: ffffffff87077070
 vprintk_emit+0x171/0x3e0 kernel/printk/printk.c:1996
 dev_vprintk_emit+0x4fc/0x541 drivers/base/core.c:3312
 dev_printk_emit+0xba/0xf1 drivers/base/core.c:3323
 __dev_printk+0x1db/0x203 drivers/base/core.c:3335
 _dev_info+0xd7/0x109 drivers/base/core.c:3381
 usb_disconnect+0x7f/0x8d0 drivers/usb/core/hub.c:2181
 hub_port_connect drivers/usb/core/hub.c:5034 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5323 [inline]
 port_event drivers/usb/core/hub.c:5469 [inline]
 hub_event+0x16ca/0x37e0 drivers/usb/core/hub.c:5551
 process_one_work+0x92b/0x1530 kernel/workqueue.c:2269
 worker_thread+0x96/0xe20 kernel/workqueue.c:2415
 kthread+0x318/0x420 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352

Allocated by task 2754:
 save_stack+0x1b/0x80 mm/kasan/common.c:69
 set_track mm/kasan/common.c:77 [inline]
 __kasan_kmalloc mm/kasan/common.c:510 [inline]
 __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:483
 slab_post_alloc_hook mm/slab.h:584 [inline]
 slab_alloc_node mm/slub.c:2772 [inline]
 __kmalloc_node_track_caller+0xfc/0x3d0 mm/slub.c:4375
 alloc_dr drivers/base/devres.c:103 [inline]
 devm_kmalloc+0x87/0x190 drivers/base/devres.c:815
 devm_kzalloc include/linux/device.h:919 [inline]
 pn533_usb_probe+0x3b/0xd75 drivers/nfc/pn533/usb.c:461
 usb_probe_interface+0x305/0x7a0 drivers/usb/core/driver.c:361
 really_probe+0x281/0x6d0 drivers/base/dd.c:548
 driver_probe_device+0x104/0x210 drivers/base/dd.c:721
 __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:828
 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:430
 __device_attach+0x217/0x360 drivers/base/dd.c:894
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:490
 device_add+0xae6/0x16f0 drivers/base/core.c:2201
 usb_set_configuration+0xdf6/0x1670 drivers/usb/core/message.c:2023
 generic_probe+0x9d/0xd5 drivers/usb/core/generic.c:210
 usb_probe_device+0x99/0x100 drivers/usb/core/driver.c:266
 really_probe+0x281/0x6d0 drivers/base/dd.c:548
 driver_probe_device+0x104/0x210 drivers/base/dd.c:721
 __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:828
 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:430
 __device_attach+0x217/0x360 drivers/base/dd.c:894
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:490
 device_add+0xae6/0x16f0 drivers/base/core.c:2201
 usb_new_device.cold+0x6a4/0xe79 drivers/usb/core/hub.c:2536
 hub_port_connect drivers/usb/core/hub.c:5183 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5323 [inline]
 port_event drivers/usb/core/hub.c:5469 [inline]
 hub_event+0x1dd0/0x37e0 drivers/usb/core/hub.c:5551
 process_one_work+0x92b/0x1530 kernel/workqueue.c:2269
 worker_thread+0x96/0xe20 kernel/workqueue.c:2415
 kthread+0x318/0x420 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352

Freed by task 2754:
 save_stack+0x1b/0x80 mm/kasan/common.c:69
 set_track mm/kasan/common.c:77 [inline]
 kasan_set_free_info mm/kasan/common.c:332 [inline]
 __kasan_slab_free+0x130/0x180 mm/kasan/common.c:471
 slab_free_hook mm/slub.c:1424 [inline]
 slab_free_freelist_hook mm/slub.c:1475 [inline]
 slab_free mm/slub.c:3018 [inline]
 kfree+0xe4/0x320 mm/slub.c:3967
 release_nodes+0x4a1/0x910 drivers/base/devres.c:508
 devres_release_all+0x74/0xc3 drivers/base/devres.c:529
 really_probe+0x42f/0x6d0 drivers/base/dd.c:605
 driver_probe_device+0x104/0x210 drivers/base/dd.c:721
 __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:828
 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:430
 __device_attach+0x217/0x360 drivers/base/dd.c:894
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:490
 device_add+0xae6/0x16f0 drivers/base/core.c:2201
 usb_set_configuration+0xdf6/0x1670 drivers/usb/core/message.c:2023
 generic_probe+0x9d/0xd5 drivers/usb/core/generic.c:210
 usb_probe_device+0x99/0x100 drivers/usb/core/driver.c:266
 really_probe+0x281/0x6d0 drivers/base/dd.c:548
 driver_probe_device+0x104/0x210 drivers/base/dd.c:721
 __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:828
 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:430
 __device_attach+0x217/0x360 drivers/base/dd.c:894
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:490
 device_add+0xae6/0x16f0 drivers/base/core.c:2201
 usb_new_device.cold+0x6a4/0xe79 drivers/usb/core/hub.c:2536
 hub_port_connect drivers/usb/core/hub.c:5183 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5323 [inline]
 port_event drivers/usb/core/hub.c:5469 [inline]
 hub_event+0x1dd0/0x37e0 drivers/usb/core/hub.c:5551
 process_one_work+0x92b/0x1530 kernel/workqueue.c:2269
 worker_thread+0x96/0xe20 kernel/workqueue.c:2415
 kthread+0x318/0x420 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352

The buggy address belongs to the object at ffff8881d58ae480
 which belongs to the cache kmalloc-96 of size 96
The buggy address is located 40 bytes inside of
 96-byte region [ffff8881d58ae480, ffff8881d58ae4e0)
The buggy address belongs to the page:
page:ffffea0007562b80 refcount:1 mapcount:0 mapping:ffff8881da002f00 index:0x0
flags: 0x200000000000200(slab)
raw: 0200000000000200 ffffea000719abc0 0000000f0000000f ffff8881da002f00
raw: 0000000000000000 0000000000200020 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8881d58ae380: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc
 ffff8881d58ae400: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
>ffff8881d58ae480: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
                                  ^
 ffff8881d58ae500: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc
 ffff8881d58ae580: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
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