==================================================================
BUG: KASAN: slab-out-of-bounds in mcp2221_raw_event+0x110d/0x1140 drivers/hid/hid-mcp2221.c:975
Read of size 1 at addr ffff888134577fff by task kworker/1:6/8695
CPU: 1 UID: 0 PID: 8695 Comm: kworker/1:6 Not tainted syzkaller #0 PREEMPT(lazy)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: usb_hub_wq hub_event
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:378 [inline]
print_report+0x13d/0x4b0 mm/kasan/report.c:482
kasan_report+0xdf/0x1c0 mm/kasan/report.c:595
mcp2221_raw_event+0x110d/0x1140 drivers/hid/hid-mcp2221.c:975
__hid_input_report.constprop.0+0x319/0x470 drivers/hid/hid-core.c:2175
hid_irq_in+0x55d/0x710 drivers/hid/usbhid/hid-core.c:287
__usb_hcd_giveback_urb+0x38e/0x610 drivers/usb/core/hcd.c:1657
usb_hcd_giveback_urb+0x3ca/0x4a0 drivers/usb/core/hcd.c:1741
dummy_timer+0xdaf/0x3820 drivers/usb/gadget/udc/dummy_hcd.c:2023
__run_hrtimer kernel/time/hrtimer.c:2074 [inline]
__hrtimer_run_queues+0x462/0x9c0 kernel/time/hrtimer.c:2131
hrtimer_run_softirq+0x1ca/0x360 kernel/time/hrtimer.c:2148
handle_softirqs+0x1d9/0x9b0 kernel/softirq.c:645
__do_softirq kernel/softirq.c:679 [inline]
invoke_softirq kernel/softirq.c:519 [inline]
__irq_exit_rcu+0x168/0x210 kernel/softirq.c:758
irq_exit_rcu+0x9/0x30 kernel/softirq.c:775
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
sysvec_apic_timer_interrupt+0x8f/0xb0 arch/x86/kernel/apic/apic.c:1062
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:228 [inline]
RIP: 0010:unwind_next_frame+0x1f6/0x2090 arch/x86/kernel/unwind_orc.c:510
Code: 89 c3 39 d0 0f 83 2f 16 00 00 48 ba 00 00 00 00 00 fc ff df 89 c1 48 8d 3c 8d b8 95 f4 8b 49 89 f8 49 c1 e8 03 45 0f b6 04 10 <48> 89 fa 83 e2 07 83 c2 03 44 38 c2 7c 2f 45 84 c0 74 2a 48 89 4c
RSP: 0018:ffffc9000213e3f8 EFLAGS: 00000a06
RAX: 00000000000050b0 RBX: 0000000000000001 RCX: 00000000000050b0
RDX: dffffc0000000000 RSI: 0000000000068d23 RDI: ffffffff8bf5d878
RBP: ffffc9000213e4b0 R08: 0000000000000000 R09: 0000000000000007
R10: 0000000000000200 R11: 00000000000050b0 R12: ffffc9000213e4b8
R13: ffffc9000213e468 R14: ffffc9000213e49d R15: ffffffff8150b060
arch_stack_walk+0x94/0xf0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
kasan_save_stack+0x30/0x50 mm/kasan/common.c:57
kasan_save_track+0x14/0x30 mm/kasan/common.c:78
poison_kmalloc_redzone mm/kasan/common.c:409 [inline]
__kasan_kmalloc+0x8f/0xa0 mm/kasan/common.c:426
kasan_kmalloc include/linux/kasan.h:263 [inline]
__kmalloc_cache_noprof+0x2d8/0x680 mm/slub.c:5563
_kmalloc_noprof include/linux/slab.h:991 [inline]
_kzalloc_noprof include/linux/slab.h:1312 [inline]
init_srcu_struct_fields+0xa67/0xfa0 kernel/rcu/srcutree.c:207
__init_srcu_struct include/linux/srcu.h:33 [inline]
gpiochip_add_data_with_key+0x2ec/0x3840 drivers/gpio/gpiolib.c:1204
devm_gpiochip_add_data_with_key+0x5c/0xd0 drivers/gpio/gpiolib-devres.c:363
mcp2221_probe.cold+0x94d/0xf16 drivers/hid/hid-mcp2221.c:1342
__hid_device_probe drivers/hid/hid-core.c:2839 [inline]
hid_device_probe+0x4fe/0x850 drivers/hid/hid-core.c:2878
call_driver_probe drivers/base/dd.c:628 [inline]
really_probe+0x241/0xa60 drivers/base/dd.c:706
__driver_probe_device+0x210/0x460 drivers/base/dd.c:868
driver_probe_device+0x4a/0x140 drivers/base/dd.c:898
__device_attach_driver+0x1df/0x320 drivers/base/dd.c:1026
bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500
__device_attach+0x1e4/0x4d0 drivers/base/dd.c:1098
device_initial_probe+0xaf/0xd0 drivers/base/dd.c:1153
bus_probe_device+0x64/0x160 drivers/base/bus.c:620
device_add+0x121d/0x1970 drivers/base/core.c:3776
hid_add_device+0x2bf/0x440 drivers/hid/hid-core.c:3065
usbhid_probe+0xa64/0x10b0 drivers/hid/usbhid/hid-core.c:1452
usb_probe_interface+0x386/0x980 drivers/usb/core/driver.c:399
call_driver_probe drivers/base/dd.c:628 [inline]
really_probe+0x241/0xa60 drivers/base/dd.c:706
__driver_probe_device+0x210/0x460 drivers/base/dd.c:868
driver_probe_device+0x4a/0x140 drivers/base/dd.c:898
__device_attach_driver+0x1df/0x320 drivers/base/dd.c:1026
bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500
__device_attach+0x1e4/0x4d0 drivers/base/dd.c:1098
device_initial_probe+0xaf/0xd0 drivers/base/dd.c:1153
bus_probe_device+0x64/0x160 drivers/base/bus.c:620
device_add+0x121d/0x1970 drivers/base/core.c:3776
usb_set_configuration+0xd97/0x1dc0 drivers/usb/core/message.c:2274
usb_generic_driver_probe+0xa1/0xe0 drivers/usb/core/generic.c:250
usb_probe_device+0xef/0x400 drivers/usb/core/driver.c:293
call_driver_probe drivers/base/dd.c:628 [inline]
really_probe+0x241/0xa60 drivers/base/dd.c:706
__driver_probe_device+0x210/0x460 drivers/base/dd.c:868
driver_probe_device+0x4a/0x140 drivers/base/dd.c:898
__device_attach_driver+0x1df/0x320 drivers/base/dd.c:1026
bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500
__device_attach+0x1e4/0x4d0 drivers/base/dd.c:1098
device_initial_probe+0xaf/0xd0 drivers/base/dd.c:1153
bus_probe_device+0x64/0x160 drivers/base/bus.c:620
device_add+0x121d/0x1970 drivers/base/core.c:3776
usb_new_device.part.0+0xcc2/0x1686 drivers/usb/core/hub.c:2713
usb_new_device drivers/usb/core/hub.c:5838 [inline]
hub_port_connect drivers/usb/core/hub.c:5585 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5725 [inline]
port_event drivers/usb/core/hub.c:5889 [inline]
hub_event.cold+0x51a/0xe9d drivers/usb/core/hub.c:5971
process_one_work+0xac7/0x1b10 kernel/workqueue.c:3396
process_scheduled_works kernel/workqueue.c:3479 [inline]
worker_thread+0x5ef/0xe50 kernel/workqueue.c:3560
kthread+0x373/0x450 kernel/kthread.c:436
ret_from_fork+0x69f/0xc90 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Allocated by task 2976:
kasan_save_stack+0x30/0x50 mm/kasan/common.c:57
kasan_save_track+0x14/0x30 mm/kasan/common.c:78
unpoison_slab_object mm/kasan/common.c:351 [inline]
__kasan_slab_alloc+0x6e/0x70 mm/kasan/common.c:377
kasan_slab_alloc include/linux/kasan.h:253 [inline]
slab_post_alloc_hook mm/slub.c:4683 [inline]
slab_alloc_node mm/slub.c:4996 [inline]
kmem_cache_alloc_noprof+0x264/0x650 mm/slub.c:5010
lsm_inode_alloc security/security.c:254 [inline]
security_inode_alloc+0x3b/0x150 security/security.c:1215
inode_init_always_gfp+0xc6f/0xfb0 fs/inode.c:298
inode_init_always include/linux/fs.h:2965 [inline]
alloc_inode+0x8e/0x250 fs/inode.c:345
new_inode+0x22/0x1c0 fs/inode.c:1170
__shmem_get_inode+0x1df/0xec0 mm/shmem.c:3043
shmem_get_inode mm/shmem.c:3140 [inline]
shmem_mknod+0xcb/0x2e0 mm/shmem.c:3833
shmem_mkdir+0x31/0x80 mm/shmem.c:3896
vfs_mkdir+0x364/0x850 fs/namei.c:5410
filename_mkdirat+0x136/0x450 fs/namei.c:5443
__do_sys_mkdirat fs/namei.c:5464 [inline]
__se_sys_mkdirat fs/namei.c:5461 [inline]
__x64_sys_mkdirat+0x89/0xc0 fs/namei.c:5461
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x119/0x710 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 23:
kasan_save_stack+0x30/0x50 mm/kasan/common.c:57
kasan_save_track+0x14/0x30 mm/kasan/common.c:78
kasan_save_free_info+0x3b/0x70 mm/kasan/generic.c:584
poison_slab_object mm/kasan/common.c:264 [inline]
__kasan_slab_free+0x43/0x70 mm/kasan/common.c:296
kasan_slab_free include/linux/kasan.h:235 [inline]
slab_free_hook mm/slub.c:2748 [inline]
slab_free mm/slub.c:6509 [inline]
kmem_cache_free+0x108/0x650 mm/slub.c:6636
rcu_do_batch kernel/rcu/tree.c:2650 [inline]
rcu_core+0x5f0/0x1260 kernel/rcu/tree.c:2919
handle_softirqs+0x1d9/0x9b0 kernel/softirq.c:645
run_ksoftirqd kernel/softirq.c:1099 [inline]
run_ksoftirqd+0x38/0x60 kernel/softirq.c:1091
smpboot_thread_fn+0x3d3/0xab0 kernel/smpboot.c:160
kthread+0x373/0x450 kernel/kthread.c:436
ret_from_fork+0x69f/0xc90 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Last potentially related work creation:
kasan_save_stack+0x30/0x50 mm/kasan/common.c:57
kasan_record_aux_stack+0x8c/0xa0 mm/kasan/generic.c:556
__call_rcu_common.constprop.0+0xa5/0x9b0 kernel/rcu/tree.c:3181
security_inode_free+0x53/0x90 security/security.c:1253
__destroy_inode+0x1ea/0x710 fs/inode.c:362
destroy_inode+0x91/0x1c0 fs/inode.c:385
evict+0x599/0xad0 fs/inode.c:846
iput_final fs/inode.c:2014 [inline]
iput.part.0+0x989/0x1050 fs/inode.c:2063
iput+0x35/0x40 fs/inode.c:2029
d_delete_notify include/linux/fsnotify.h:381 [inline]
vfs_rmdir fs/namei.c:5528 [inline]
vfs_rmdir+0x5c8/0x8a0 fs/namei.c:5488
filename_rmdir+0x2eb/0x590 fs/namei.c:5572
__do_sys_unlinkat fs/namei.c:5747 [inline]
__se_sys_unlinkat fs/namei.c:5740 [inline]
__x64_sys_unlinkat+0xf5/0x130 fs/namei.c:5740
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x119/0x710 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888134577f18
which belongs to the cache lsm_inode_cache of size 120
The buggy address is located 111 bytes to the right of
allocated 120-byte region [ffff888134577f18, ffff888134577f90)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x134577
flags: 0x200000000000000(node=0|zone=2)
page_type: f5(slab)
raw: 0200000000000000 ffff8881012ea500 dead000000000100 dead000000000122
raw: 0000000000000000 0000000200160016 00000000f5000000 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0xd2c40(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5502, tgid 5502 (syz-executor), ts 121080318192
set_page_owner include/linux/page_owner.h:33 [inline]
post_alloc_hook+0xfd/0x120 mm/page_alloc.c:1871
prep_new_page mm/page_alloc.c:1879 [inline]
get_page_from_freelist+0xf4b/0x3440 mm/page_alloc.c:3943
__alloc_frozen_pages_noprof+0x2d7/0x2f70 mm/page_alloc.c:5436
alloc_slab_page mm/slub.c:3347 [inline]
allocate_slab mm/slub.c:3462 [inline]
new_slab+0xa9/0x6e0 mm/slub.c:3513
refill_objects+0xe3/0x410 mm/slub.c:7418
refill_sheaf mm/slub.c:2885 [inline]
__pcs_replace_empty_main+0x35e/0x650 mm/slub.c:4774
alloc_from_pcs mm/slub.c:4850 [inline]
slab_alloc_node mm/slub.c:4984 [inline]
kmem_cache_alloc_noprof+0x471/0x650 mm/slub.c:5010
lsm_inode_alloc security/security.c:254 [inline]
security_inode_alloc+0x3b/0x150 security/security.c:1215
inode_init_always_gfp+0xc6f/0xfb0 fs/inode.c:298
inode_init_always include/linux/fs.h:2965 [inline]
alloc_inode+0x8e/0x250 fs/inode.c:345
new_inode+0x22/0x1c0 fs/inode.c:1170
__shmem_get_inode+0x1df/0xec0 mm/shmem.c:3043
shmem_get_inode mm/shmem.c:3140 [inline]
shmem_symlink+0x11f/0xbf0 mm/shmem.c:4066
vfs_symlink fs/namei.c:5794 [inline]
vfs_symlink+0x178/0x4d0 fs/namei.c:5773
filename_symlinkat+0x17b/0x450 fs/namei.c:5819
__do_sys_symlinkat fs/namei.c:5839 [inline]
__se_sys_symlinkat fs/namei.c:5834 [inline]
__x64_sys_symlinkat+0x9c/0xe0 fs/namei.c:5834
page last free pid 5498 tgid 5497 ts 121062754212 stack trace:
reset_page_owner include/linux/page_owner.h:26 [inline]
__free_pages_prepare mm/page_alloc.c:1418 [inline]
__free_frozen_pages+0x714/0xfc0 mm/page_alloc.c:2962
tlb_batch_list_free mm/mmu_gather.c:161 [inline]
tlb_finish_mmu+0x27d/0x810 mm/mmu_gather.c:552
exit_mmap+0x454/0xa00 mm/mmap.c:1328
__mmput kernel/fork.c:1193 [inline]
mmput+0xe0/0x430 kernel/fork.c:1216
exit_mm kernel/exit.c:592 [inline]
do_exit+0x83b/0x2a50 kernel/exit.c:974
do_group_exit+0xd5/0x2a0 kernel/exit.c:1129
get_signal+0x1ec7/0x21e0 kernel/signal.c:3112
arch_do_signal_or_restart+0x91/0x7e0 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
exit_to_user_mode_loop+0xd2/0x530 kernel/entry/common.c:101
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:343 [inline]
do_syscall_64+0x55a/0x710 arch/x86/entry/syscall_64.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff888134577e80: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc
ffff888134577f00: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888134577f80: fb fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc
^
ffff888134578000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff888134578080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
----------------
Code disassembly (best guess):
0: 89 c3 mov %eax,%ebx
2: 39 d0 cmp %edx,%eax
4: 0f 83 2f 16 00 00 jae 0x1639
a: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx
11: fc ff df
14: 89 c1 mov %eax,%ecx
16: 48 8d 3c 8d b8 95 f4 lea -0x740b6a48(,%rcx,4),%rdi
1d: 8b
1e: 49 89 f8 mov %rdi,%r8
21: 49 c1 e8 03 shr $0x3,%r8
25: 45 0f b6 04 10 movzbl (%r8,%rdx,1),%r8d
* 2a: 48 89 fa mov %rdi,%rdx <-- trapping instruction
2d: 83 e2 07 and $0x7,%edx
30: 83 c2 03 add $0x3,%edx
33: 44 38 c2 cmp %r8b,%dl
36: 7c 2f jl 0x67
38: 45 84 c0 test %r8b,%r8b
3b: 74 2a je 0x67
3d: 48 rex.W
3e: 89 .byte 0x89
3f: 4c rex.WR