==================================================================
BUG: KASAN: use-after-free in mcp2221_raw_event+0x1070/0x10a0 drivers/hid/hid-mcp2221.c:948
Read of size 1 at addr ffff888135087fff by task kworker/0:5/5285
CPU: 0 UID: 0 PID: 5285 Comm: kworker/0:5 Not tainted syzkaller #0 PREEMPT(voluntary)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Workqueue: pm pm_runtime_work
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:378 [inline]
print_report+0xcd/0x630 mm/kasan/report.c:482
kasan_report+0xe0/0x110 mm/kasan/report.c:595
mcp2221_raw_event+0x1070/0x10a0 drivers/hid/hid-mcp2221.c:948
__hid_input_report.constprop.0+0x314/0x450 drivers/hid/hid-core.c:2139
hid_irq_in+0x35e/0x870 drivers/hid/usbhid/hid-core.c:286
__usb_hcd_giveback_urb+0x38b/0x610 drivers/usb/core/hcd.c:1661
usb_hcd_giveback_urb+0x39b/0x450 drivers/usb/core/hcd.c:1745
dummy_timer+0x1809/0x3a00 drivers/usb/gadget/udc/dummy_hcd.c:1995
__run_hrtimer kernel/time/hrtimer.c:1777 [inline]
__hrtimer_run_queues+0x202/0xad0 kernel/time/hrtimer.c:1841
hrtimer_run_softirq+0x17d/0x350 kernel/time/hrtimer.c:1858
handle_softirqs+0x208/0x8d0 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0xfa/0x160 kernel/softirq.c:723
irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline]
sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1052
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x31/0x80 kernel/locking/spinlock.c:194
Code: f5 53 48 8b 74 24 10 48 89 fb 48 83 c7 18 e8 36 02 14 fa 48 89 df e8 1e 56 14 fa f7 c5 00 02 00 00 75 23 9c 58 f6 c4 02 75 37 01 00 00 00 e8 85 b1 07 fa 65 8b 05 de 0f 51 05 85 c0 74 16 5b
RSP: 0018:ffffc90003faf6e0 EFLAGS: 00000246
RAX: 0000000000000006 RBX: ffff8881f59258c0 RCX: 0000000000000006
RDX: 0000000000000000 RSI: ffffffff88c86f47 RDI: ffffffff87897540
RBP: 0000000000000287 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff8aa0d0d7 R11: 0000000000000001 R12: 1ffff920007f5edf
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
__try_to_del_timer_sync+0x115/0x170 kernel/time/timer.c:1466
__timer_delete_sync+0xf4/0x1b0 kernel/time/timer.c:1620
hub_quiesce+0x1b6/0x320 drivers/usb/core/hub.c:1409
hub_suspend+0x541/0xa80 drivers/usb/core/hub.c:4002
usb_suspend_interface drivers/usb/core/driver.c:1323 [inline]
usb_suspend_both+0x302/0xc70 drivers/usb/core/driver.c:1445
usb_runtime_suspend+0x49/0x180 drivers/usb/core/driver.c:1997
__rpm_callback+0xc8/0x610 drivers/base/power/runtime.c:406
rpm_callback+0x1b7/0x200 drivers/base/power/runtime.c:460
rpm_suspend+0x2e1/0x11d0 drivers/base/power/runtime.c:698
__pm_runtime_suspend+0xba/0x1a0 drivers/base/power/runtime.c:1167
pm_runtime_autosuspend include/linux/pm_runtime.h:415 [inline]
usb_runtime_idle+0x7e/0x90 drivers/usb/core/driver.c:2034
rpm_idle+0x32a/0x780 drivers/base/power/runtime.c:550
pm_runtime_work+0x120/0x150 drivers/base/power/runtime.c:995
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3263
process_scheduled_works kernel/workqueue.c:3346 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3427
kthread+0x3c5/0x780 kernel/kthread.c:463
ret_from_fork+0x56d/0x700 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x135087
flags: 0x200000000000000(node=0|zone=2)
raw: 0200000000000000 0000000000000000 00000000ffffffff 0000000000000000
raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as freed
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5653, tgid 5653 (udevd), ts 1626541826815, free_ts 1677820597275
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1850
prep_new_page mm/page_alloc.c:1858 [inline]
get_page_from_freelist+0x1003/0x2dc0 mm/page_alloc.c:3884
__alloc_frozen_pages_noprof+0x259/0x21f0 mm/page_alloc.c:5183
alloc_pages_mpol+0xe4/0x410 mm/mempolicy.c:2416
alloc_slab_page mm/slub.c:3039 [inline]
allocate_slab mm/slub.c:3212 [inline]
new_slab+0x24a/0x360 mm/slub.c:3266
___slab_alloc+0xdb7/0x1a70 mm/slub.c:4636
__slab_alloc.constprop.0+0x63/0x110 mm/slub.c:4755
__slab_alloc_node mm/slub.c:4831 [inline]
slab_alloc_node mm/slub.c:5253 [inline]
kmem_cache_alloc_noprof+0x393/0x6c0 mm/slub.c:5272
getname_flags.part.0+0x4c/0x550 fs/namei.c:146
getname_flags+0x93/0xf0 include/linux/audit.h:345
getname include/linux/fs.h:2922 [inline]
do_sys_openat2+0xb8/0x1d0 fs/open.c:1431
do_sys_open fs/open.c:1452 [inline]
__do_sys_openat fs/open.c:1468 [inline]
__se_sys_openat fs/open.c:1463 [inline]
__x64_sys_openat+0x174/0x210 fs/open.c:1463
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4d0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 14307 tgid 14307 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1394 [inline]
__free_frozen_pages+0x78f/0x1000 mm/page_alloc.c:2906
discard_slab mm/slub.c:3310 [inline]
__put_partials+0x130/0x170 mm/slub.c:3857
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x4d/0x120 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x4e/0x70 mm/kasan/common.c:352
kasan_slab_alloc include/linux/kasan.h:252 [inline]
slab_post_alloc_hook mm/slub.c:4955 [inline]
slab_alloc_node mm/slub.c:5265 [inline]
kmem_cache_alloc_noprof+0x260/0x6c0 mm/slub.c:5272
__kernfs_new_node+0xd2/0x8e0 fs/kernfs/dir.c:637
kernfs_new_node+0x13c/0x1e0 fs/kernfs/dir.c:713
__kernfs_create_file+0x53/0x350 fs/kernfs/file.c:1057
sysfs_add_file_mode_ns+0x207/0x3c0 fs/sysfs/file.c:313
sysfs_merge_group+0x1aa/0x340 fs/sysfs/group.c:376
dpm_sysfs_add+0x237/0x280 drivers/base/power/sysfs.c:704
device_add+0x9a6/0x1aa0 drivers/base/core.c:3649
usb_create_ep_devs+0x160/0x2b0 drivers/usb/core/endpoint.c:170
create_intf_ep_devs.isra.0+0x161/0x200 drivers/usb/core/message.c:1252
usb_set_configuration+0x11a7/0x1e20 drivers/usb/core/message.c:2216
Memory state around the buggy address:
ffff888135087e80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ffff888135087f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff888135087f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
^
ffff888135088000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff888135088080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
----------------
Code disassembly (best guess):
0: f5 cmc
1: 53 push %rbx
2: 48 8b 74 24 10 mov 0x10(%rsp),%rsi
7: 48 89 fb mov %rdi,%rbx
a: 48 83 c7 18 add $0x18,%rdi
e: e8 36 02 14 fa call 0xfa140249
13: 48 89 df mov %rbx,%rdi
16: e8 1e 56 14 fa call 0xfa145639
1b: f7 c5 00 02 00 00 test $0x200,%ebp
21: 75 23 jne 0x46
23: 9c pushf
24: 58 pop %rax
25: f6 c4 02 test $0x2,%ah
28: 75 37 jne 0x61
* 2a: bf 01 00 00 00 mov $0x1,%edi <-- trapping instruction
2f: e8 85 b1 07 fa call 0xfa07b1b9
34: 65 8b 05 de 0f 51 05 mov %gs:0x5510fde(%rip),%eax # 0x5511019
3b: 85 c0 test %eax,%eax
3d: 74 16 je 0x55
3f: 5b pop %rbx