==================================================================
BUG: KASAN: slab-out-of-bounds in snd_usb_mixer_notify_id+0x219/0x2a0 sound/usb/mixer.c:3240
Write of size 4 at addr ffff8881d249a460 by task kworker/0:7/3366

CPU: 0 PID: 3366 Comm: kworker/0:7 Not tainted 5.8.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: usb_hub_wq hub_event
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0xf6/0x16e lib/dump_stack.c:118
 print_address_description.constprop.0+0x1a/0x210 mm/kasan/report.c:383
 __kasan_report mm/kasan/report.c:513 [inline]
 kasan_report.cold+0x37/0x7c mm/kasan/report.c:530
 snd_usb_mixer_notify_id+0x219/0x2a0 sound/usb/mixer.c:3240
 snd_usb_mixer_interrupt+0x24f/0xbd0 sound/usb/mixer.c:3379
 __usb_hcd_giveback_urb+0x32d/0x560 drivers/usb/core/hcd.c:1650
 usb_hcd_giveback_urb+0x367/0x410 drivers/usb/core/hcd.c:1716
 dummy_timer+0x11f2/0x3240 drivers/usb/gadget/udc/dummy_hcd.c:1967
 call_timer_fn+0x1ac/0x6e0 kernel/time/timer.c:1404
 expire_timers kernel/time/timer.c:1449 [inline]
 __run_timers.part.0+0x54c/0x9e0 kernel/time/timer.c:1773
 __run_timers kernel/time/timer.c:1745 [inline]
 run_timer_softirq+0x80/0x120 kernel/time/timer.c:1786
 __do_softirq+0x222/0x95b kernel/softirq.c:292
 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:711
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
 do_softirq_own_stack+0xed/0x140 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:387 [inline]
 __irq_exit_rcu kernel/softirq.c:417 [inline]
 irq_exit_rcu+0x150/0x1f0 kernel/softirq.c:429
 sysvec_apic_timer_interrupt+0x115/0x1c0 arch/x86/kernel/apic/apic.c:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:596
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/irqflags.h:85 [inline]
RIP: 0010:console_unlock+0xa99/0xcd0 kernel/printk/printk.c:2511
Code: 00 89 ee 48 c7 c7 20 c1 34 87 e8 e2 b7 03 00 65 ff 0d bb cc d8 7e e9 87 f9 ff ff e8 51 2c 16 00 e8 6c b7 1b 00 ff 74 24 30 9d <e9> 20 fe ff ff e8 3d 2c 16 00 48 8d 7d 08 48 89 f8 48 c1 e8 03 42
RSP: 0018:ffff8881d266f5c0 EFLAGS: 00000212
RAX: 0000000000000000 RBX: 0000000000000200 RCX: 1ffffffff1014c62
RDX: 1ffff1103a212747 RSI: 0000000000000000 RDI: ffff8881d1093a38
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001
R10: fffffbfff12b4ecc R11: 0000000000000000 R12: ffffffff82afb3c0
R13: ffffffff876f2230 R14: 0000000000000065 R15: dffffc0000000000
 vprintk_emit+0x1b2/0x460 kernel/printk/printk.c:2031
 dev_vprintk_emit+0x3eb/0x436 drivers/base/core.c:3883
 dev_printk_emit+0xba/0xf1 drivers/base/core.c:3894
 __dev_printk+0xcf/0xf5 drivers/base/core.c:3906
 _dev_info+0xd7/0x109 drivers/base/core.c:3952
 announce_device drivers/usb/core/hub.c:2275 [inline]
 usb_new_device.cold+0x306/0xfd4 drivers/usb/core/hub.c:2534
 hub_port_connect drivers/usb/core/hub.c:5208 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5348 [inline]
 port_event drivers/usb/core/hub.c:5494 [inline]
 hub_event+0x2361/0x4390 drivers/usb/core/hub.c:5576
 process_one_work+0x94c/0x15f0 kernel/workqueue.c:2269
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415
 kthread+0x392/0x470 kernel/kthread.c:291
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293

Allocated by task 3076:
 save_stack+0x1b/0x40 mm/kasan/common.c:48
 set_track mm/kasan/common.c:56 [inline]
 __kasan_kmalloc.constprop.0+0xc2/0xd0 mm/kasan/common.c:494
 kmalloc include/linux/slab.h:555 [inline]
 kzalloc include/linux/slab.h:669 [inline]
 add_single_ctl_with_resume+0x53/0x1d0 sound/usb/mixer_quirks.c:147
 snd_mbox1_create_sync_switch sound/usb/mixer_quirks.c:719 [inline]
 snd_usb_mixer_apply_create_quirk+0x14d9/0x1fd0 sound/usb/mixer_quirks.c:2654
 snd_usb_create_mixer+0x7d5/0x1950 sound/usb/mixer.c:3538
 create_standard_mixer_quirk+0x57/0x70 sound/usb/quirks.c:508
 snd_usb_create_quirk sound/usb/quirks.c:563 [inline]
 create_composite_quirk+0x242/0x4b0 sound/usb/quirks.c:48
 snd_usb_create_quirk+0x9f/0xd0 sound/usb/quirks.c:563
 usb_audio_probe+0xa53/0x2290 sound/usb/card.c:674
 usb_probe_interface+0x315/0x7f0 drivers/usb/core/driver.c:374
 really_probe+0x291/0xc90 drivers/base/dd.c:525
 driver_probe_device+0x26b/0x3d0 drivers/base/dd.c:701
 __device_attach_driver+0x1d1/0x290 drivers/base/dd.c:807
 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:431
 __device_attach+0x28d/0x430 drivers/base/dd.c:873
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491
 device_add+0xb09/0x1b40 drivers/base/core.c:2680
 usb_set_configuration+0xf05/0x18a0 drivers/usb/core/message.c:2032
 usb_generic_driver_probe+0xba/0xf2 drivers/usb/core/generic.c:241
 usb_probe_device+0xd9/0x250 drivers/usb/core/driver.c:272
 really_probe+0x291/0xc90 drivers/base/dd.c:525
 driver_probe_device+0x26b/0x3d0 drivers/base/dd.c:701
 __device_attach_driver+0x1d1/0x290 drivers/base/dd.c:807
 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:431
 __device_attach+0x28d/0x430 drivers/base/dd.c:873
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491
 device_add+0xb09/0x1b40 drivers/base/core.c:2680
 usb_new_device.cold+0x71d/0xfd4 drivers/usb/core/hub.c:2554
 hub_port_connect drivers/usb/core/hub.c:5208 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5348 [inline]
 port_event drivers/usb/core/hub.c:5494 [inline]
 hub_event+0x2361/0x4390 drivers/usb/core/hub.c:5576
 process_one_work+0x94c/0x15f0 kernel/workqueue.c:2269
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415
 kthread+0x392/0x470 kernel/kthread.c:291
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293

Freed by task 350:
 save_stack+0x1b/0x40 mm/kasan/common.c:48
 set_track mm/kasan/common.c:56 [inline]
 kasan_set_free_info mm/kasan/common.c:316 [inline]
 __kasan_slab_free+0x116/0x160 mm/kasan/common.c:455
 slab_free_hook mm/slub.c:1474 [inline]
 slab_free_freelist_hook+0x53/0x140 mm/slub.c:1507
 slab_free mm/slub.c:3072 [inline]
 kfree+0xbc/0x2c0 mm/slub.c:4063
 __vunmap+0x8f3/0xb70 mm/vmalloc.c:2310
 __vfree mm/vmalloc.c:2351 [inline]
 vfree+0x88/0x140 mm/vmalloc.c:2381
 copy_entries_to_user net/ipv4/netfilter/ip_tables.c:867 [inline]
 get_entries net/ipv4/netfilter/ip_tables.c:1024 [inline]
 do_ipt_get_ctl+0x6ee/0x8e0 net/ipv4/netfilter/ip_tables.c:1700
 nf_sockopt net/netfilter/nf_sockopt.c:104 [inline]
 nf_getsockopt+0x72/0xd0 net/netfilter/nf_sockopt.c:122
 ip_getsockopt net/ipv4/ip_sockglue.c:1749 [inline]
 ip_getsockopt+0x167/0x1c0 net/ipv4/ip_sockglue.c:1729
 tcp_getsockopt+0x86/0xd0 net/ipv4/tcp.c:3893
 __sys_getsockopt+0x135/0x210 net/socket.c:2172
 __do_sys_getsockopt net/socket.c:2187 [inline]
 __se_sys_getsockopt net/socket.c:2184 [inline]
 __x64_sys_getsockopt+0xba/0x150 net/socket.c:2184
 do_syscall_64+0x50/0x90 arch/x86/entry/common.c:359
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

The buggy address belongs to the object at ffff8881d249a400
 which belongs to the cache kmalloc-64 of size 64
The buggy address is located 32 bytes to the right of
 64-byte region [ffff8881d249a400, ffff8881d249a440)
The buggy address belongs to the page:
page:ffffea0007492680 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0
flags: 0x200000000000200(slab)
raw: 0200000000000200 ffffea000766e700 0000000e0000000e ffff8881da003180
raw: 0000000000000000 0000000000200020 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8881d249a300: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff8881d249a380: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
>ffff8881d249a400: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc
                                                       ^
 ffff8881d249a480: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff8881d249a500: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
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