================================================================== 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 ffff8881cb7a2240 by task udevd/7563 CPU: 0 PID: 7563 Comm: udevd Not tainted 5.4.0-rc1+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __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 RIP: 0010:lock_is_held_type+0x43/0x240 kernel/locking/lockdep.c:4518 Code: 8b 1c 25 00 ef 01 00 48 8d bb 4c 08 00 00 48 83 ec 18 48 89 f9 89 74 24 14 48 c1 e9 03 0f b6 0c 01 48 89 f8 83 e0 07 83 c0 03 <38> c8 7c 08 84 c9 0f 85 a6 01 00 00 8b 93 4c 08 00 00 85 d2 0f 85 RSP: 0018:ffff8881d271faa0 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000007 RBX: ffff8881d0a30000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffff8881d0a3084c RBP: ffffffff85c68de0 R08: 0000000000000000 R09: ffffed103aafab2e R10: ffffed103aafab2d R11: ffff8881d57d596f R12: 00000000000005d6 R13: dffffc0000000000 R14: ffffffff86cfe420 R15: ffff8881d621f468 lock_is_held include/linux/lockdep.h:362 [inline] rcu_preempt_sleep_check include/linux/rcupdate.h:272 [inline] ___might_sleep+0x1c5/0x2b0 kernel/sched/core.c:6774 down_read+0x74/0x420 kernel/locking/rwsem.c:1494 anon_vma_lock_read include/linux/rmap.h:130 [inline] validate_mm+0xd3/0x610 mm/mmap.c:407 mmap_region+0xfbc/0x13c0 mm/mmap.c:1829 do_mmap+0x859/0x1170 mm/mmap.c:1577 do_mmap_pgoff include/linux/mm.h:2353 [inline] vm_mmap_pgoff+0x195/0x1f0 mm/util.c:496 ksys_mmap_pgoff+0xd8/0x5b0 mm/mmap.c:1629 do_syscall_64+0xb7/0x580 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f7336da5d0a Code: b8 ff ff ff ff e9 fa fe ff ff 48 63 fb b8 03 00 00 00 0f 05 b8 ff ff ff ff e9 e6 fe ff ff 90 90 49 89 ca b8 09 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d fe c0 2a 00 31 d2 48 29 c2 64 RSP: 002b:00007ffedf860038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 00000000008c0a80 RCX: 00007f7336da5d0a RDX: 0000000000000003 RSI: 0000000000001000 RDI: 0000000000000000 RBP: 0000000000001000 R08: 00000000ffffffff R09: 0000000000000000 R10: 0000000000000022 R11: 0000000000000246 R12: 000000000000000a R13: 0000000000000000 R14: 0000000000000000 R15: 00007ffedf8605d0 Allocated by task 2856: 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 3811: 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 ffff8881cb7a2140 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 0 bytes to the right of 256-byte region [ffff8881cb7a2140, ffff8881cb7a2240) The buggy address belongs to the page: page:ffffea00072de880 refcount:1 mapcount:0 mapping:ffff8881da002780 index:0x0 flags: 0x200000000000200(slab) raw: 0200000000000200 ffffea00072b8600 0000000600000006 ffff8881da002780 raw: 0000000000000000 00000000000c000c 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881cb7a2100: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 ffff8881cb7a2180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8881cb7a2200: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ^ ffff8881cb7a2280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881cb7a2300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================