==================================================================
BUG: KASAN: slab-out-of-bounds in mceusb_handle_command drivers/media/rc/mceusb.c:1146 [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+0x101e/0x12e0 drivers/media/rc/mceusb.c:1321
Read of size 1 at addr ffff8881d5b2d100 by task syz-executor.4/27352

CPU: 0 PID: 27352 Comm: syz-executor.4 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:1146 [inline]
 mceusb_process_ir_data drivers/media/rc/mceusb.c:1238 [inline]
 mceusb_dev_recv+0x101e/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:rol32 include/linux/bitops.h:83 [inline]
RIP: 0010:jhash2 include/linux/jhash.h:128 [inline]
RIP: 0010:hash_stack lib/stackdepot.c:152 [inline]
RIP: 0010:stack_depot_save+0x63/0x440 lib/stackdepot.c:233
Code: c9 8d 04 8d 7b 71 f5 75 83 f9 03 89 cf 0f 86 69 02 00 00 89 c3 89 c1 48 89 ee 03 5e 08 83 ef 03 48 83 c6 0c 03 46 f4 03 4e f8 <41> 89 d8 29 d8 41 c1 c0 04 44 31 c0 01 cb 41 89 c0 29 c1 01 d8 41
RSP: 0018:ffff8881ca97f1f8 EFLAGS: 00000217 ORIG_RAX: ffffffffffffff13
RAX: 00000000f75aa8ee RBX: 00000000f75aaa83 RCX: 0000000075f57212
RDX: 0000000000000800 RSI: ffff8881ca97f254 RDI: 0000000000000023
RBP: ffff8881ca97f248 R08: ffffffff8827ee98 R09: ffffed103b64658d
R10: ffffed103b64658c R11: ffff8881db232c63 R12: 0000000000000013
R13: ffff8881da10f680 R14: 0000000000000246 R15: ffffea0006a03608
 save_stack+0x4c/0x80 mm/kasan/common.c:71
 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]
 kmem_cache_free+0xb9/0x380 mm/slub.c:3034
 free_buffer_head+0x42/0xa0 fs/buffer.c:3383
 try_to_free_buffers+0x235/0x3d0 fs/buffer.c:3298
 ext4_releasepage+0x31c/0x3f0 fs/ext4/inode.c:3393
 try_to_release_page+0x1b7/0x260 mm/filemap.c:3500
 block_invalidatepage+0x424/0x4a0 fs/buffer.c:1501
 do_invalidatepage mm/truncate.c:163 [inline]
 truncate_cleanup_page+0xf9/0x2d0 mm/truncate.c:185
 truncate_inode_pages_range+0x563/0x11b0 mm/truncate.c:365
 truncate_inode_pages mm/truncate.c:476 [inline]
 truncate_pagecache+0x63/0x90 mm/truncate.c:805
 ext4_setattr+0x1263/0x1e00 fs/ext4/inode.c:5659
 notify_change+0xb09/0xf90 fs/attr.c:337
 do_truncate+0x134/0x1f0 fs/open.c:64
 handle_truncate fs/namei.c:2998 [inline]
 do_last fs/namei.c:3414 [inline]
 path_openat+0x1944/0x3ff0 fs/namei.c:3525
 do_filp_open+0x1a1/0x280 fs/namei.c:3555
 do_sys_open+0x3c0/0x580 fs/open.c:1097
 do_syscall_64+0xb7/0x580 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x413941
Code: 75 14 b8 02 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 04 19 00 00 c3 48 83 ec 08 e8 0a fa ff ff 48 89 04 24 b8 02 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fa ff ff 48 89 d0 48 83 c4 08 48 3d 01
RSP: 002b:00007f54573ea7a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 0000000000413941
RDX: 0000000000000000 RSI: 0000000000000201 RDI: 00007f54573ea850
RBP: 000000000075bfc8 R08: 00007f54573ea7b0 R09: 000000000075bfc8
R10: 0000000000000000 R11: 0000000000000293 R12: 00007f54573eb6d4
R13: 00000000004c90ab R14: 00000000004e0590 R15: 00000000ffffffff

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 3283:
 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 drivers/base/core.c:2300 [inline]
 device_unregister+0x23/0x30 drivers/base/core.c:2408
 usb_remove_ep_devs+0x3e/0x80 drivers/usb/core/endpoint.c:215
 usb_disconnect+0x4b3/0x8d0 drivers/usb/core/hub.c:2218
 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 ffff8881d5b2d000
 which belongs to the cache kmalloc-256 of size 256
The buggy address is located 0 bytes to the right of
 256-byte region [ffff8881d5b2d000, ffff8881d5b2d100)
The buggy address belongs to the page:
page:ffffea000756cb40 refcount:1 mapcount:0 mapping:ffff8881da002780 index:0x0
flags: 0x200000000000200(slab)
raw: 0200000000000200 ffffea00072999c0 0000000c0000000c ffff8881da002780
raw: 0000000000000000 00000000000c000c 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8881d5b2d000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8881d5b2d080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8881d5b2d100: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00
                   ^
 ffff8881d5b2d180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8881d5b2d200: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
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