==================================================================
BUG: KASAN: slab-out-of-bounds in mcp2221_raw_event+0xfcd/0x1190 drivers/hid/hid-mcp2221.c:852
Read of size 1 at addr ffff8880575f7fff by task kworker/0:3/5832
CPU: 0 UID: 0 PID: 5832 Comm: kworker/0:3 Not tainted 6.15.0-rc6-syzkaller-00047-ge9565e23cd89 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: usb_hub_wq hub_event
Call Trace:
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:408 [inline]
print_report+0xb4/0x290 mm/kasan/report.c:521
kasan_report+0x118/0x150 mm/kasan/report.c:634
mcp2221_raw_event+0xfcd/0x1190 drivers/hid/hid-mcp2221.c:852
__hid_input_report drivers/hid/hid-core.c:2117 [inline]
hid_input_report+0x407/0x520 drivers/hid/hid-core.c:2144
hid_irq_in+0x47e/0x6d0 drivers/hid/usbhid/hid-core.c:286
__usb_hcd_giveback_urb+0x41a/0x690 drivers/usb/core/hcd.c:1650
dummy_timer+0x862/0x4550 drivers/usb/gadget/udc/dummy_hcd.c:1994
__run_hrtimer kernel/time/hrtimer.c:1761 [inline]
__hrtimer_run_queues+0x52c/0xc60 kernel/time/hrtimer.c:1825
hrtimer_run_softirq+0x187/0x2b0 kernel/time/hrtimer.c:1842
handle_softirqs+0x283/0x870 kernel/softirq.c:579
__do_softirq kernel/softirq.c:613 [inline]
invoke_softirq kernel/softirq.c:453 [inline]
__irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680
irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:devtmpfs_submit_req drivers/base/devtmpfs.c:124 [inline]
RIP: 0010:devtmpfs_create_node+0x1d8/0x240 drivers/base/devtmpfs.c:153
Code: 4c 89 35 ab 7e c7 13 48 c7 c7 00 9a 8f 8e e8 4f 0a 6a 05 48 8b 3d 58 7e c7 13 e8 b3 4d a2 fb 4c 89 ff e8 bb b3 68 05 48 89 df 43 64 28 fc 8b 84 24 a0 00 00 00 48 c7 04 24 0e 36 e0 45 4b c7
RSP: 0018:ffffc9000448e4c0 EFLAGS: 00000246
RAX: 7f3269510c50ba00 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000007 RSI: ffffffff8d74c01e RDI: 0000000000000000
RBP: ffffc9000448e638 R08: ffffffff8f7efb77 R09: 1ffffffff1efdf6e
R10: dffffc0000000000 R11: fffffbfff1efdf6f R12: dffffc0000000000
R13: 1ffff92000891c98 R14: ffffc9000448e500 R15: ffffc9000448e508
device_add+0x9db/0xb50 drivers/base/core.c:3666
cdev_device_add+0x1d6/0x390 fs/char_dev.c:556
i2cdev_attach_adapter+0x2ed/0x4e0 drivers/i2c/i2c-dev.c:691
notifier_call_chain+0x1b3/0x3e0 kernel/notifier.c:85
blocking_notifier_call_chain+0x6a/0x90 kernel/notifier.c:380
bus_notify+0x143/0x180 drivers/base/bus.c:1001
device_add+0x54d/0xb50 drivers/base/core.c:3672
i2c_register_adapter+0x4e3/0x10d0 drivers/i2c/i2c-core-base.c:1569
devm_i2c_add_adapter+0x1b/0x80 drivers/i2c/i2c-core-base.c:1843
mcp2221_probe+0x404/0x880 drivers/hid/hid-mcp2221.c:1193
__hid_device_probe drivers/hid/hid-core.c:2717 [inline]
hid_device_probe+0x397/0x710 drivers/hid/hid-core.c:2754
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x26a/0x9a0 drivers/base/dd.c:657
__driver_probe_device+0x18c/0x2f0 drivers/base/dd.c:799
driver_probe_device+0x4f/0x430 drivers/base/dd.c:829
__device_attach_driver+0x2ce/0x530 drivers/base/dd.c:957
bus_for_each_drv+0x251/0x2e0 drivers/base/bus.c:462
__device_attach+0x2b8/0x400 drivers/base/dd.c:1029
bus_probe_device+0x185/0x260 drivers/base/bus.c:537
device_add+0x7b6/0xb50 drivers/base/core.c:3692
hid_add_device+0x398/0x540 drivers/hid/hid-core.c:2900
usbhid_probe+0xe13/0x12a0 drivers/hid/usbhid/hid-core.c:1432
usb_probe_interface+0x641/0xbc0 drivers/usb/core/driver.c:396
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x26a/0x9a0 drivers/base/dd.c:657
__driver_probe_device+0x18c/0x2f0 drivers/base/dd.c:799
driver_probe_device+0x4f/0x430 drivers/base/dd.c:829
__device_attach_driver+0x2ce/0x530 drivers/base/dd.c:957
bus_for_each_drv+0x251/0x2e0 drivers/base/bus.c:462
__device_attach+0x2b8/0x400 drivers/base/dd.c:1029
bus_probe_device+0x185/0x260 drivers/base/bus.c:537
device_add+0x7b6/0xb50 drivers/base/core.c:3692
usb_set_configuration+0x1a87/0x20e0 drivers/usb/core/message.c:2210
usb_generic_driver_probe+0x8d/0x150 drivers/usb/core/generic.c:250
usb_probe_device+0x1c4/0x390 drivers/usb/core/driver.c:291
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x26a/0x9a0 drivers/base/dd.c:657
__driver_probe_device+0x18c/0x2f0 drivers/base/dd.c:799
driver_probe_device+0x4f/0x430 drivers/base/dd.c:829
__device_attach_driver+0x2ce/0x530 drivers/base/dd.c:957
bus_for_each_drv+0x251/0x2e0 drivers/base/bus.c:462
__device_attach+0x2b8/0x400 drivers/base/dd.c:1029
bus_probe_device+0x185/0x260 drivers/base/bus.c:537
device_add+0x7b6/0xb50 drivers/base/core.c:3692
usb_new_device+0xa39/0x16c0 drivers/usb/core/hub.c:2663
hub_port_connect drivers/usb/core/hub.c:5531 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5671 [inline]
port_event drivers/usb/core/hub.c:5831 [inline]
hub_event+0x2941/0x4a00 drivers/usb/core/hub.c:5913
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0xade/0x17a0 kernel/workqueue.c:3319
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400
kthread+0x711/0x8a0 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Allocated by task 6052:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:394
kasan_kmalloc include/linux/kasan.h:260 [inline]
__do_kmalloc_node mm/slub.c:4327 [inline]
__kmalloc_noprof+0x27a/0x4f0 mm/slub.c:4339
kmalloc_noprof include/linux/slab.h:909 [inline]
tomoyo_realpath_from_path+0xe3/0x5d0 security/tomoyo/realpath.c:251
tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
tomoyo_path_perm+0x213/0x4b0 security/tomoyo/file.c:822
security_inode_getattr+0x12f/0x330 security/security.c:2377
vfs_getattr fs/stat.c:256 [inline]
vfs_fstat fs/stat.c:278 [inline]
__do_sys_newfstat fs/stat.c:546 [inline]
__se_sys_newfstat fs/stat.c:543 [inline]
__x64_sys_newfstat+0xfe/0x200 fs/stat.c:543
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 6052:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x62/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2380 [inline]
slab_free mm/slub.c:4642 [inline]
kfree+0x193/0x440 mm/slub.c:4841
tomoyo_realpath_from_path+0x598/0x5d0 security/tomoyo/realpath.c:286
tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
tomoyo_path_perm+0x213/0x4b0 security/tomoyo/file.c:822
security_inode_getattr+0x12f/0x330 security/security.c:2377
vfs_getattr fs/stat.c:256 [inline]
vfs_fstat fs/stat.c:278 [inline]
__do_sys_newfstat fs/stat.c:546 [inline]
__se_sys_newfstat fs/stat.c:543 [inline]
__x64_sys_newfstat+0xfe/0x200 fs/stat.c:543
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff8880575f6000
which belongs to the cache kmalloc-4k of size 4096
The buggy address is located 4095 bytes to the right of
allocated 4096-byte region [ffff8880575f6000, ffff8880575f7000)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x575f0
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88801a042140 ffffea0001ec5a00 dead000000000002
raw: 0000000000000000 0000000000040004 00000000f5000000 0000000000000000
head: 00fff00000000040 ffff88801a042140 ffffea0001ec5a00 dead000000000002
head: 0000000000000000 0000000000040004 00000000f5000000 0000000000000000
head: 00fff00000000003 ffffea00015d7c01 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd2820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 13, tgid 13 (kworker/u8:1), ts 183858598974, free_ts 177101278064
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1d8/0x230 mm/page_alloc.c:1718
prep_new_page mm/page_alloc.c:1726 [inline]
get_page_from_freelist+0x21ce/0x22b0 mm/page_alloc.c:3688
__alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:4970
alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2301
alloc_slab_page mm/slub.c:2450 [inline]
allocate_slab+0x8a/0x3b0 mm/slub.c:2618
new_slab mm/slub.c:2672 [inline]
___slab_alloc+0xbfc/0x1480 mm/slub.c:3858
__slab_alloc mm/slub.c:3948 [inline]
__slab_alloc_node mm/slub.c:4023 [inline]
slab_alloc_node mm/slub.c:4184 [inline]
__do_kmalloc_node mm/slub.c:4326 [inline]
__kmalloc_node_track_caller_noprof+0x2f8/0x4e0 mm/slub.c:4346
kmalloc_reserve+0x136/0x290 net/core/skbuff.c:599
__alloc_skb+0x142/0x2d0 net/core/skbuff.c:668
alloc_skb include/linux/skbuff.h:1340 [inline]
nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:748 [inline]
nsim_dev_trap_report drivers/net/netdevsim/dev.c:805 [inline]
nsim_dev_trap_report_work+0x29a/0xb80 drivers/net/netdevsim/dev.c:851
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0xade/0x17a0 kernel/workqueue.c:3319
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400
kthread+0x711/0x8a0 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
page last free pid 1099 tgid 1099 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1262 [inline]
free_unref_folios+0xb81/0x14a0 mm/page_alloc.c:2782
folios_put_refs+0x559/0x640 mm/swap.c:992
release_pages+0x4b4/0x520 mm/swap.c:1032
io_free_region+0xb4/0x270 io_uring/memmap.c:101
io_rings_free io_uring/io_uring.c:2658 [inline]
io_ring_ctx_free+0x29e/0x4a0 io_uring/io_uring.c:2743
io_ring_exit_work+0x810/0x880 io_uring/io_uring.c:2962
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0xade/0x17a0 kernel/workqueue.c:3319
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400
kthread+0x711/0x8a0 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Memory state around the buggy address:
ffff8880575f7e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff8880575f7f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8880575f7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
^
ffff8880575f8000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff8880575f8080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
----------------
Code disassembly (best guess):
0: 4c 89 35 ab 7e c7 13 mov %r14,0x13c77eab(%rip) # 0x13c77eb2
7: 48 c7 c7 00 9a 8f 8e mov $0xffffffff8e8f9a00,%rdi
e: e8 4f 0a 6a 05 call 0x56a0a62
13: 48 8b 3d 58 7e c7 13 mov 0x13c77e58(%rip),%rdi # 0x13c77e72
1a: e8 b3 4d a2 fb call 0xfba24dd2
1f: 4c 89 ff mov %r15,%rdi
22: e8 bb b3 68 05 call 0x568b3e2
27: 48 89 df mov %rbx,%rdi
* 2a: e8 43 64 28 fc call 0xfc286472 <-- trapping instruction
2f: 8b 84 24 a0 00 00 00 mov 0xa0(%rsp),%eax
36: 48 c7 04 24 0e 36 e0 movq $0x45e0360e,(%rsp)
3d: 45
3e: 4b rex.WXB
3f: c7 .byte 0xc7