==================================================================
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 ffff8881d9be5100 by task syz-executor.5/5363

CPU: 1 PID: 5363 Comm: syz-executor.5 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: 0010:pte_none arch/x86/include/asm/pgtable.h:721 [inline]
RIP: 0010:zap_pte_range mm/memory.c:1026 [inline]
RIP: 0010:zap_pmd_range mm/memory.c:1166 [inline]
RIP: 0010:zap_pud_range mm/memory.c:1195 [inline]
RIP: 0010:zap_p4d_range mm/memory.c:1216 [inline]
RIP: 0010:unmap_page_range+0x81d/0x1a00 mm/memory.c:1237
Code: 00 10 00 00 48 89 44 24 08 e8 bf 75 e4 ff 48 8b 04 24 48 c1 e8 03 42 80 3c 30 00 0f 85 ac 0e 00 00 48 8b 04 24 31 ff 4c 8b 20 <4c> 89 e3 48 83 e3 9f 48 89 de e8 24 77 e4 ff 48 85 db 0f 85 7d fe
RSP: 0018:ffff8881c610f760 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: ffff8881cbe23d80 RBX: 00007f3377db0000 RCX: ffffffff8159a647
RDX: 0000000000000000 RSI: ffffffff8159a671 RDI: 0000000000000000
RBP: ffffea0006c42c70 R08: ffff8881d70d4800 R09: fffff94000d8858f
R10: fffff94000d8858e R11: ffffea0006c42c73 R12: 80000001b10b2007
R13: ffff8881c610fa20 R14: dffffc0000000000 R15: 00007f3377e00000
 unmap_single_vma+0x196/0x300 mm/memory.c:1282
 unmap_vmas+0x179/0x300 mm/memory.c:1314
 exit_mmap+0x278/0x4d0 mm/mmap.c:3161
 __mmput kernel/fork.c:1079 [inline]
 mmput+0xce/0x3d0 kernel/fork.c:1100
 exit_mm kernel/exit.c:485 [inline]
 do_exit+0x7f8/0x2c00 kernel/exit.c:804
 do_group_exit+0x125/0x340 kernel/exit.c:921
 get_signal+0x466/0x23d0 kernel/signal.c:2734
 do_signal+0x88/0x14e0 arch/x86/kernel/signal.c:815
 exit_to_usermode_loop+0x1a2/0x200 arch/x86/entry/common.c:159
 prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:274 [inline]
 do_syscall_64+0x45f/0x580 arch/x86/entry/common.c:300
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x459897
Code: Bad RIP value.
RSP: 002b:00007f33778c8ef8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: fffffffffffffffc RBX: 0000000000000000 RCX: 0000000000459897
RDX: 00007f33778c93a0 RSI: 0000000080085502 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00af040900000000 R09: 0000000000000000
R10: 0000000000000075 R11: 0000000000000246 R12: 0000000000000012
R13: 00000000004bf0b6 R14: 00000000004e0858 R15: 00000000ffffffff

Allocated by task 2782:
 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
 process_scheduled_works kernel/workqueue.c:2331 [inline]
 worker_thread+0x7ab/0xe20 kernel/workqueue.c:2417
 kthread+0x318/0x420 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352

Freed by task 102:
 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+0xe4/0x2f0 mm/slub.c:3959
 kobject_cleanup lib/kobject.c:693 [inline]
 kobject_release lib/kobject.c:722 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x171/0x280 lib/kobject.c:739
 put_device+0x1b/0x30 drivers/base/core.c:2300
 hub_port_connect drivers/usb/core/hub.c:4949 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5213 [inline]
 port_event drivers/usb/core/hub.c:5359 [inline]
 hub_event+0x1454/0x3640 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

The buggy address belongs to the object at ffff8881d9be5000
 which belongs to the cache kmalloc-256 of size 256
The buggy address is located 0 bytes to the right of
 256-byte region [ffff8881d9be5000, ffff8881d9be5100)
The buggy address belongs to the page:
page:ffffea000766f940 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:
 ffff8881d9be5000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8881d9be5080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8881d9be5100: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
                   ^
 ffff8881d9be5180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881d9be5200: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
==================================================================