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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 ffff888094610960 by task syz-fuzzer/6797

CPU: 0 PID: 6797 Comm: syz-fuzzer Not tainted 5.7.0-syzkaller #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+0x188/0x20d lib/dump_stack.c:118
 print_address_description.constprop.0.cold+0xd3/0x413 mm/kasan/report.c:383
 __kasan_report mm/kasan/report.c:513 [inline]
 kasan_report.cold+0x1f/0x37 mm/kasan/report.c:530
 snd_usb_mixer_notify_id+0x219/0x2a0 sound/usb/mixer.c:3240
 snd_usb_mixer_interrupt+0x416/0x980 sound/usb/mixer.c:3379
 __usb_hcd_giveback_urb+0x2af/0x4b0 drivers/usb/core/hcd.c:1650
 usb_hcd_giveback_urb+0x368/0x420 drivers/usb/core/hcd.c:1716
 __skb_queue_head_init include/linux/skbuff.h:1854 [inline]
 skbpoolfree drivers/block/aoe/aoedev.c:435 [inline]
 freedev drivers/block/aoe/aoedev.c:290 [inline]
 dummy_timer+0x1243/0x2fe1 drivers/block/aoe/aoedev.c:366
 call_timer_fn+0x1ac/0x780 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+0x623/0x1600 kernel/time/timer.c:1786
 __do_softirq+0x26c/0x9f7 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x192/0x1d0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:546 [inline]
 smp_apic_timer_interrupt+0x19e/0x600 arch/x86/kernel/apic/apic.c:1107
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
 </IRQ>
RIP: 0033:0x799af5
Code: 44 24 08 48 8b 84 24 80 00 00 00 48 89 44 24 10 48 8b 8c 24 88 00 00 00 48 89 4c 24 18 e8 93 89 c7 ff 48 8b 44 24 20 48 8b 00 <48> 85 c0 0f 84 b6 03 00 00 48 8b 4c 24 40 48 8b 51 18 48 8b 59 10
RSP: 002b:000000c01670e9f8 EFLAGS: 00000216 ORIG_RAX: ffffffffffffff13
RAX: 00000000010d1e80 RBX: 0000000000000008 RCX: 000000c0003c6680
RDX: 000000c0003c6698 RSI: 00000000008a3e40 RDI: 0000000000000001
RBP: 000000c01670ea50 R08: 000000000093dc99 R09: 000000000093dc99
R10: 000000c00000c560 R11: 000000000087ad40 R12: 00000000000000f1
R13: 0000000000000000 R14: 0000000000ad8fb2 R15: 0000000000000000

Allocated by task 2484:
 save_stack+0x1b/0x40 mm/kasan/common.c:48
 set_track mm/kasan/common.c:56 [inline]
 __kasan_kmalloc mm/kasan/common.c:494 [inline]
 __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:467
 kmem_cache_alloc_trace+0x153/0x7d0 mm/slab.c:3551
 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+0x17ac/0x2000 sound/usb/mixer_quirks.c:2654
 snd_usb_create_mixer+0x7de/0x18c0 sound/usb/mixer.c:3538
 create_standard_mixer_quirk+0x57/0x70 sound/usb/quirks.c:508
 snd_usb_create_quirk+0x9f/0xd0 sound/usb/quirks.c:563
 create_composite_quirk+0x1d5/0x420 sound/usb/quirks.c:48
 snd_usb_create_quirk+0x9f/0xd0 sound/usb/quirks.c:563
 usb_audio_probe+0x57a/0x2240 sound/usb/card.c:668
 usb_probe_interface+0x305/0x7a0 drivers/usb/core/driver.c:374
 really_probe+0x281/0x6d0 drivers/base/dd.c:520
 driver_probe_device+0x104/0x210 drivers/base/dd.c:697
 __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:804
 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:431
 __device_attach+0x21a/0x360 drivers/base/dd.c:870
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491
 device_add+0x132d/0x1c10 drivers/base/core.c:2557
 usb_set_configuration+0xec5/0x1740 drivers/usb/core/message.c:2032
 usb_generic_driver_probe+0x9d/0xe0 drivers/usb/core/generic.c:241
 usb_probe_device+0xc6/0x1f0 drivers/usb/core/driver.c:272
 really_probe+0x281/0x6d0 drivers/base/dd.c:520
 driver_probe_device+0x104/0x210 drivers/base/dd.c:697
 __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:804
 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:431
 __device_attach+0x21a/0x360 drivers/base/dd.c:870
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491
 device_add+0x132d/0x1c10 drivers/base/core.c:2557
 usb_new_device.cold+0x753/0x103d 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+0x1eca/0x38f0 drivers/usb/core/hub.c:5576
 process_one_work+0x965/0x16a0 kernel/workqueue.c:2268
 process_scheduled_works kernel/workqueue.c:2330 [inline]
 worker_thread+0x7ab/0xe20 kernel/workqueue.c:2416
 kthread+0x388/0x470 kernel/kthread.c:268
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:351

Freed by task 114:
 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+0xf7/0x140 mm/kasan/common.c:455
 __cache_free mm/slab.c:3426 [inline]
 kfree+0x109/0x2b0 mm/slab.c:3757
 batadv_tvlv_realloc_packet_buff net/batman-adv/tvlv.c:284 [inline]
 batadv_tvlv_container_ogm_append+0x19e/0x4d0 net/batman-adv/tvlv.c:318
 batadv_iv_ogm_schedule_buff+0xfe2/0x1230 net/batman-adv/bat_iv_ogm.c:812
 batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:869 [inline]
 batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:862 [inline]
 batadv_iv_send_outstanding_bat_ogm_packet+0x5c8/0x7c0 net/batman-adv/bat_iv_ogm.c:1722
 process_one_work+0x965/0x16a0 kernel/workqueue.c:2268
 worker_thread+0x96/0xe20 kernel/workqueue.c:2414
 kthread+0x388/0x470 kernel/kthread.c:268
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:351

The buggy address belongs to the object at ffff888094610900
 which belongs to the cache kmalloc-64 of size 64
The buggy address is located 32 bytes to the right of
 64-byte region [ffff888094610900, ffff888094610940)
The buggy address belongs to the page:
page:ffffea0002518400 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0
flags: 0xfffe0000000200(slab)
raw: 00fffe0000000200 ffffea00024762c8 ffffea00024dc388 ffff8880aa000380
raw: 0000000000000000 ffff888094610000 0000000100000020 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888094610800: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff888094610880: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
>ffff888094610900: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc
                                                       ^
 ffff888094610980: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff888094610a00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
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