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BUG: KASAN: slab-out-of-bounds in snd_usb_mixer_notify_id sound/usb/mixer.c:3219 [inline]
BUG: KASAN: slab-out-of-bounds in snd_usb_mixer_interrupt+0xaa7/0xc30 sound/usb/mixer.c:3358
Write of size 4 at addr ffff8881c77397e0 by task swapper/1/0

CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.4.49-syzkaller-00895-gc8c4041e5dab #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+0x14a/0x1ce lib/dump_stack.c:118
 print_address_description+0x93/0x620 mm/kasan/report.c:374
 __kasan_report+0x16d/0x1e0 mm/kasan/report.c:506
 kasan_report+0x36/0x60 mm/kasan/common.c:634
 snd_usb_mixer_notify_id sound/usb/mixer.c:3219 [inline]
 snd_usb_mixer_interrupt+0xaa7/0xc30 sound/usb/mixer.c:3358
 __usb_hcd_giveback_urb+0x265/0x3b0 drivers/usb/core/hcd.c:1654
 dummy_timer+0x778/0x4260 drivers/usb/gadget/udc/dummy_hcd.c:1966
 call_timer_fn+0x154/0x340 kernel/time/timer.c:1404
 expire_timers+0x35c/0x470 kernel/time/timer.c:1449
 __run_timers+0x662/0x7b0 kernel/time/timer.c:1773
 run_timer_softirq+0x19/0x30 kernel/time/timer.c:1786
 __do_softirq+0x2d5/0x725 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x16d/0x180 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:546 [inline]
 smp_apic_timer_interrupt+0x281/0x3f0 arch/x86/kernel/apic/apic.c:1146
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:831
 </IRQ>
RIP: 0010:default_idle+0x1f/0x30 arch/x86/kernel/process.c:573
Code: ff e8 e5 34 42 fd 90 90 90 90 90 65 8b 35 61 64 2a 7c bf 01 00 00 00 e8 df c0 30 fd e9 07 00 00 00 0f 00 2d 3b 51 49 00 fb f4 <65> 8b 35 42 64 2a 7c bf ff ff ff ff e9 c0 c0 30 fd 41 57 41 56 53
RSP: 0018:ffff8881da9e7d78 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 59fd8d1f9a0b8d01 RBX: ffff8881da9bcd80 RCX: ffffffff8124c6e0
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffff8881da9e7e80 R08: dffffc0000000000 R09: ffffed103b5379b1
R10: ffffed103b5379b1 R11: 0000000000000000 R12: ffffffff84d900a0
R13: 0000000000000001 R14: dffffc0000000000 R15: 1ffff1103b5379b0
 default_idle_call kernel/sched/idle.c:94 [inline]
 cpuidle_idle_call kernel/sched/idle.c:154 [inline]
 do_idle+0x209/0x5e0 kernel/sched/idle.c:263
 cpu_startup_entry+0x15/0x20 kernel/sched/idle.c:355
 start_secondary+0x35d/0x3f0 arch/x86/kernel/smpboot.c:264
 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:241

Allocated by task 24088:
 save_stack mm/kasan/common.c:69 [inline]
 set_track mm/kasan/common.c:77 [inline]
 __kasan_kmalloc+0x12c/0x1c0 mm/kasan/common.c:510
 kmem_cache_alloc_trace+0xc3/0x280 mm/slub.c:2793
 kmalloc include/linux/slab.h:556 [inline]
 kzalloc include/linux/slab.h:690 [inline]
 add_single_ctl_with_resume sound/usb/mixer_quirks.c:146 [inline]
 snd_mbox1_create_sync_switch sound/usb/mixer_quirks.c:718 [inline]
 snd_usb_mixer_apply_create_quirk+0xad1/0x30c0 sound/usb/mixer_quirks.c:2238
 snd_usb_create_mixer+0x22c3/0x31a0 sound/usb/mixer.c:3517
 snd_usb_create_quirk sound/usb/quirks.c:563 [inline]
 create_composite_quirk+0x221/0x510 sound/usb/quirks.c:48
 usb_audio_probe+0xd69/0x2470 sound/usb/card.c:715
 usb_probe_interface+0x631/0xad0 drivers/usb/core/driver.c:361
 really_probe+0x764/0xf70 drivers/base/dd.c:560
 driver_probe_device+0xe6/0x230 drivers/base/dd.c:729
 bus_for_each_drv+0x17a/0x200 drivers/base/bus.c:430
 __device_attach+0x27b/0x420 drivers/base/dd.c:902
 bus_probe_device+0xbb/0x200 drivers/base/bus.c:490
 device_add+0x13db/0x17c0 drivers/base/core.c:2644
 usb_set_configuration+0x197f/0x1f00 drivers/usb/core/message.c:2030
 generic_probe+0x82/0x140 drivers/usb/core/generic.c:210
 really_probe+0x764/0xf70 drivers/base/dd.c:560
 driver_probe_device+0xe6/0x230 drivers/base/dd.c:729
 bus_for_each_drv+0x17a/0x200 drivers/base/bus.c:430
 __device_attach+0x27b/0x420 drivers/base/dd.c:902
 bus_probe_device+0xbb/0x200 drivers/base/bus.c:490
 device_add+0x13db/0x17c0 drivers/base/core.c:2644
 usb_new_device+0xda7/0x1710 drivers/usb/core/hub.c:2554
 hub_port_connect drivers/usb/core/hub.c:5123 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5238 [inline]
 port_event drivers/usb/core/hub.c:5384 [inline]
 hub_event+0x2963/0x4fa0 drivers/usb/core/hub.c:5466
 process_one_work+0x777/0xf90 kernel/workqueue.c:2274
 worker_thread+0xa8f/0x1430 kernel/workqueue.c:2420
 kthread+0x2df/0x300 kernel/kthread.c:255
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352

Freed by task 23413:
 save_stack mm/kasan/common.c:69 [inline]
 set_track mm/kasan/common.c:77 [inline]
 kasan_set_free_info mm/kasan/common.c:332 [inline]
 __kasan_slab_free+0x181/0x230 mm/kasan/common.c:471
 slab_free_hook mm/slub.c:1424 [inline]
 slab_free_freelist_hook+0xd0/0x150 mm/slub.c:1457
 slab_free mm/slub.c:3014 [inline]
 kfree+0x12b/0x600 mm/slub.c:3975
 context_add_hash+0x1c7/0x280 security/selinux/ss/services.c:1478
 context_struct_to_sid security/selinux/ss/services.c:1491 [inline]
 security_compute_sid+0x11da/0x1d50 security/selinux/ss/services.c:1855
 security_transition_sid+0x78/0x90 security/selinux/ss/services.c:1880
 selinux_determine_inode_label security/selinux/hooks.c:1805 [inline]
 may_create+0x64e/0x9a0 security/selinux/hooks.c:1840
 security_inode_symlink+0xa6/0x120 security/security.c:1140
 vfs_symlink2+0x2fa/0x500 fs/namei.c:4260
 do_symlinkat+0x1d9/0x420 fs/namei.c:4297
 do_syscall_64+0xcb/0x150 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

The buggy address belongs to the object at ffff8881c7739780
 which belongs to the cache kmalloc-64 of size 64
The buggy address is located 32 bytes to the right of
 64-byte region [ffff8881c7739780, ffff8881c77397c0)
The buggy address belongs to the page:
page:ffffea00071dce40 refcount:1 mapcount:0 mapping:ffff8881da803180 index:0xffff8881c7739680
flags: 0x8000000000000200(slab)
raw: 8000000000000200 ffffea0007221480 0000000f0000000f ffff8881da803180
raw: ffff8881c7739680 000000008020001e 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8881c7739680: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff8881c7739700: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
>ffff8881c7739780: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc
                                                       ^
 ffff8881c7739800: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff8881c7739880: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
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