================================================================== 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 ffff8881d51bf380 by task udevd/10994 CPU: 0 PID: 10994 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: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 RIP: 0010:lock_acquire+0x16a/0x320 kernel/locking/lockdep.c:4491 Code: c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 95 01 00 00 c7 83 4c 08 00 00 00 00 00 00 ff 34 24 9d <48> 83 c4 18 5b 5d 41 5c 41 5d 41 5e 41 5f c3 65 8b 15 a0 ec db 7e RSP: 0018:ffff8881c775f7f8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000007 RBX: ffff8881d5464800 RCX: 0000000000001766 RDX: 0000000000000000 RSI: 1ffff11038eebee8 RDI: ffff8881d546504c RBP: ffffffff86dc26e0 R08: ffffffff88d527b0 R09: fffffbfff11b25b2 R10: fffffbfff11b25b1 R11: ffffffff88d92d8f R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 __mutex_lock_common kernel/locking/mutex.c:956 [inline] __mutex_lock+0x158/0x1360 kernel/locking/mutex.c:1103 kernfs_get_open_node fs/kernfs/file.c:548 [inline] kernfs_fop_open+0x6cf/0xdb0 fs/kernfs/file.c:717 do_dentry_open+0x494/0x1120 fs/open.c:797 do_last fs/namei.c:3408 [inline] path_openat+0x1430/0x3ff0 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: 0033:0x7f59d53fd120 Code: 48 8b 15 1b 4d 2b 00 f7 d8 64 89 02 83 c8 ff c3 90 90 90 90 90 90 90 90 90 90 83 3d d5 a4 2b 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 5e 8c 01 00 48 89 04 24 RSP: 002b:00007ffead897438 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00000000016fde40 RCX: 00007f59d53fd120 RDX: 00000000000001b6 RSI: 0000000000080000 RDI: 00007ffead897510 RBP: 00007ffead8974b0 R08: 0000000000000008 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000008 R13: 000000000041f57a R14: 00000000016f8250 R15: 000000000000000b Allocated by task 2980: 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 0: 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 __rcu_reclaim kernel/rcu/rcu.h:215 [inline] rcu_do_batch kernel/rcu/tree.c:2157 [inline] rcu_core+0x4f4/0x1ca0 kernel/rcu/tree.c:2377 __do_softirq+0x221/0x912 kernel/softirq.c:292 The buggy address belongs to the object at ffff8881d51bf280 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 0 bytes to the right of 256-byte region [ffff8881d51bf280, ffff8881d51bf380) The buggy address belongs to the page: page:ffffea0007546fc0 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: ffff8881d51bf280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8881d51bf300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8881d51bf380: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb ^ ffff8881d51bf400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881d51bf480: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 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