==================================================================
BUG: KASAN: slab-out-of-bounds in mceusb_handle_command drivers/media/rc/mceusb.c:1147 [inline]
BUG: KASAN: slab-out-of-bounds in mceusb_process_ir_data drivers/media/rc/mceusb.c:1238 [inline]
BUG: KASAN: slab-out-of-bounds in mceusb_dev_recv+0x1032/0x12e0 drivers/media/rc/mceusb.c:1321
Read of size 1 at addr ffff8881cf631d80 by task sshd/1710

CPU: 1 PID: 1710 Comm: sshd Not tainted 5.4.0-rc1+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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
 mceusb_handle_command drivers/media/rc/mceusb.c:1147 [inline]
 mceusb_process_ir_data drivers/media/rc/mceusb.c:1238 [inline]
 mceusb_dev_recv+0x1032/0x12e0 drivers/media/rc/mceusb.c:1321
 __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:1965
 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: 0033:0x7f3b007dbe96
Code: 47 0f b6 2c 2e 41 31 ec 41 31 f0 0f b6 eb 0f b6 f6 c1 e7 10 41 0f b6 2c 2e 41 0f b6 34 36 41 31 fa 0f b6 fc c1 e9 08 c1 eb 08 <41> 0f b6 3c 3e 41 0f b6 14 0e 41 0f b6 0c 1e 41 c1 e1 10 41 c1 e5
RSP: 002b:00007ffc9e9b19d8 EFLAGS: 00000207 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000aee RBX: 00000000000000d1 RCX: 00000000000000f6
RDX: 0000000000008aa7 RSI: 000000000000007e RDI: 000000000000000a
RBP: 0000000000000087 R08: 000000000000ed4c R09: 000000000000005c
R10: 000000000016e5be R11: 0000000000006cc0 R12: 0000000000009d07
R13: 0000000000000028 R14: 00007f3b007ddc00 R15: 000055cbfca42e70

Allocated by task 2747:
 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
 kmalloc include/linux/slab.h:557 [inline]
 hcd_buffer_alloc+0x1ed/0x290 drivers/usb/core/buffer.c:132
 usb_alloc_coherent+0x5d/0x80 drivers/usb/core/usb.c:910
 mceusb_dev_probe+0x714/0x2f51 drivers/media/rc/mceusb.c:1674
 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:5098 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5213 [inline]
 port_event drivers/usb/core/hub.c:5359 [inline]
 hub_event+0x1b5c/0x3640 drivers/usb/core/hub.c:5441
 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 0:
(stack is not available)

The buggy address belongs to the object at ffff8881cf631c80
 which belongs to the cache kmalloc-256 of size 256
The buggy address is located 0 bytes to the right of
 256-byte region [ffff8881cf631c80, ffff8881cf631d80)
The buggy address belongs to the page:
page:ffffea00073d8c40 refcount:1 mapcount:0 mapping:ffff8881da002780 index:0x0
flags: 0x200000000000200(slab)
raw: 0200000000000200 dead000000000100 dead000000000122 ffff8881da002780
raw: 0000000000000000 00000000000c000c 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8881cf631c80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8881cf631d00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8881cf631d80: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00
                   ^
 ffff8881cf631e00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8881cf631e80: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
==================================================================