==================================================================
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 ffff8881cacbd0e0 by task swapper/1/0
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.8.0-rc1-syzkaller #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+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
__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:native_irq_disable arch/x86/include/asm/irqflags.h:49 [inline]
RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:89 [inline]
RIP: 0010:acpi_safe_halt+0x72/0x90 drivers/acpi/processor_idle.c:112
Code: 74 06 5b e9 c0 91 8f fb e8 bb 91 8f fb e8 d6 1c 95 fb e9 0c 00 00 00 e8 ac 91 8f fb 0f 00 2d 65 f3 74 00 e8 a0 91 8f fb fb f4 e8 c8 16 95 fb 5b e9 92 91 8f fb 48 89 df e8 da 37 b9 fb eb ab
RSP: 0018:ffff8881da22fc80 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 1ffffffff1014c62
RDX: ffff8881da213200 RSI: ffffffff85afbd00 RDI: ffff8881da213a38
RBP: ffff8881d8cca864 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8881d8cca864
R13: 1ffff1103b445f99 R14: ffff8881d8cca865 R15: 0000000000000001
acpi_idle_do_entry+0x15c/0x1b0 drivers/acpi/processor_idle.c:525
acpi_idle_enter+0x3f0/0xa50 drivers/acpi/processor_idle.c:651
cpuidle_enter_state+0xff/0x870 drivers/cpuidle/cpuidle.c:234
cpuidle_enter+0x4a/0xa0 drivers/cpuidle/cpuidle.c:345
call_cpuidle kernel/sched/idle.c:117 [inline]
cpuidle_idle_call kernel/sched/idle.c:207 [inline]
do_idle+0x3d6/0x530 kernel/sched/idle.c:269
cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:365
start_secondary+0x2d2/0x3c0 arch/x86/kernel/smpboot.c:268
secondary_startup_64+0xb6/0xc0 arch/x86/kernel/head_64.S:243
Allocated by task 67:
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 2733:
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
ext4_htree_free_dir_info fs/ext4/dir.c:433 [inline]
ext4_release_dir+0x49/0x60 fs/ext4/dir.c:629
__fput+0x339/0x870 fs/file_table.c:281
task_work_run+0xdd/0x1a0 kernel/task_work.c:123
tracehook_notify_resume include/linux/tracehook.h:188 [inline]
exit_to_usermode_loop arch/x86/entry/common.c:216 [inline]
__prepare_exit_to_usermode+0x19e/0x1a0 arch/x86/entry/common.c:246
do_syscall_64+0x5c/0x90 arch/x86/entry/common.c:368
entry_SYSCALL_64_after_hwframe+0x44/0xa9
The buggy address belongs to the object at ffff8881cacbd080
which belongs to the cache kmalloc-64 of size 64
The buggy address is located 32 bytes to the right of
64-byte region [ffff8881cacbd080, ffff8881cacbd0c0)
The buggy address belongs to the page:
page:ffffea00072b2f40 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8881cacbd000
flags: 0x200000000000200(slab)
raw: 0200000000000200 ffffea000713dd40 0000000300000003 ffff8881da003180
raw: ffff8881cacbd000 000000008020001f 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff8881cacbcf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff8881cacbd000: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
>ffff8881cacbd080: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc
^
ffff8881cacbd100: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc
ffff8881cacbd180: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
==================================================================