==================================================================
BUG: KASAN: slab-use-after-free in usbhid_power+0x7c/0xd0 drivers/hid/usbhid/hid-core.c:1284
Read of size 8 at addr ffff88811a108008 by task syz.4.1375/4386
CPU: 0 UID: 0 PID: 4386 Comm: syz.4.1375 Not tainted syzkaller #0 02f2c9a1947d185dcc234937001f7d1e6f97c77a
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
__dump_stack+0x21/0x30 lib/dump_stack.c:94
dump_stack_lvl+0x140/0x1c0 lib/dump_stack.c:120
print_address_description+0x71/0x210 mm/kasan/report.c:377
print_report+0x4a/0x70 mm/kasan/report.c:481
kasan_report+0x162/0x1a0 mm/kasan/report.c:594
__asan_report_load8_noabort+0x18/0x20 mm/kasan/report_generic.c:381
usbhid_power+0x7c/0xd0 drivers/hid/usbhid/hid-core.c:1284
hid_hw_power include/linux/hid.h:1174 [inline]
hidraw_open+0x257/0x960 drivers/hid/hidraw.c:302
chrdev_open+0x4e8/0x610 fs/char_dev.c:414
do_dentry_open+0x97f/0x1510 fs/open.c:960
vfs_open+0x86/0x240 fs/open.c:1092
do_open fs/namei.c:3782 [inline]
path_openat+0x2c49/0x35a0 fs/namei.c:3941
do_filp_open+0x1f2/0x440 fs/namei.c:3968
do_sys_openat2+0x134/0x1d0 fs/open.c:1440
do_sys_open fs/open.c:1455 [inline]
__do_sys_openat fs/open.c:1471 [inline]
__se_sys_openat fs/open.c:1466 [inline]
__x64_sys_openat+0x13a/0x170 fs/open.c:1466
x64_sys_call+0xe69/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:258
do_syscall_x64 arch/x86/entry/common.c:47 [inline]
do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7faa5b55e90e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007faa5c3c8b28 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007faa5c3c96c0 RCX: 00007faa5b55e90e
RDX: 0000000000000000 RSI: 00007faa5c3c8c00 RDI: ffffffffffffff9c
RBP: 00007faa5c3c8c00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: cccccccccccccccd
R13: 00007faa5b826038 R14: 00007faa5b825fa0 R15: 00007fffc91ecf58
Allocated by task 4042:
kasan_save_stack mm/kasan/common.c:49 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:70
kasan_save_alloc_info+0x3a/0x50 mm/kasan/generic.c:565
unpoison_slab_object mm/kasan/common.c:321 [inline]
__kasan_slab_alloc+0x73/0x90 mm/kasan/common.c:347
kasan_slab_alloc include/linux/kasan.h:251 [inline]
slab_post_alloc_hook mm/slub.c:4202 [inline]
slab_alloc_node mm/slub.c:4251 [inline]
kmem_cache_alloc_lru_noprof+0x1c2/0x410 mm/slub.c:4272
shmem_alloc_inode+0x3b/0xd0 mm/shmem.c:4892
alloc_inode+0x7d/0x270 fs/inode.c:269
new_inode_pseudo fs/inode.c:1117 [inline]
new_inode+0x25/0x1e0 fs/inode.c:1136
__shmem_get_inode mm/shmem.c:2921 [inline]
shmem_get_inode+0x352/0xc10 mm/shmem.c:3018
shmem_symlink+0xa6/0x4e0 mm/shmem.c:3932
vfs_symlink+0x3f4/0x620 fs/namei.c:4623
do_symlinkat+0x1ba/0x400 fs/namei.c:4649
__do_sys_symlinkat fs/namei.c:4665 [inline]
__se_sys_symlinkat fs/namei.c:4662 [inline]
__x64_sys_symlinkat+0x99/0xb0 fs/namei.c:4662
x64_sys_call+0x1f79/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:267
do_syscall_x64 arch/x86/entry/common.c:47 [inline]
do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
entry_SYSCALL_64_after_hwframe+0x76/0x7e
Freed by task 20:
kasan_save_stack mm/kasan/common.c:49 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:70
kasan_save_free_info+0x44/0x50 mm/kasan/generic.c:579
poison_slab_object mm/kasan/common.c:249 [inline]
__kasan_slab_free+0x5f/0x80 mm/kasan/common.c:266
kasan_slab_free include/linux/kasan.h:234 [inline]
slab_free_hook mm/slub.c:2445 [inline]
slab_free mm/slub.c:4714 [inline]
kmem_cache_free+0x1bd/0x4f0 mm/slub.c:4825
shmem_free_in_core_inode+0x94/0xc0 mm/shmem.c:4902
i_callback+0x61/0xa0 fs/inode.c:258
rcu_do_batch+0x56a/0xcb0 kernel/rcu/tree.c:2575
nocb_cb_wait kernel/rcu/tree_nocb.h:923 [inline]
rcu_nocb_cb_kthread+0x533/0xb60 kernel/rcu/tree_nocb.h:957
kthread+0x2c7/0x360 kernel/kthread.c:389
ret_from_fork+0x67/0xa0 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Last potentially related work creation:
kasan_save_stack+0x3e/0x60 mm/kasan/common.c:49
__kasan_record_aux_stack+0xb2/0xd0 mm/kasan/generic.c:541
kasan_record_aux_stack_noalloc+0xf/0x20 mm/kasan/generic.c:551
__call_rcu_common+0xd5/0x710 kernel/rcu/tree.c:3098
call_rcu+0x14/0x20 kernel/rcu/tree.c:3202
destroy_inode fs/inode.c:324 [inline]
evict+0x8a0/0xaf0 fs/inode.c:762
iput_final fs/inode.c:1890 [inline]
iput+0x651/0x910 fs/inode.c:1916
do_unlinkat+0x3d2/0x5a0 fs/namei.c:4548
__do_sys_unlink fs/namei.c:4589 [inline]
__se_sys_unlink fs/namei.c:4587 [inline]
__x64_sys_unlink+0x4b/0x60 fs/namei.c:4587
x64_sys_call+0x286c/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:88
do_syscall_x64 arch/x86/entry/common.c:47 [inline]
do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
entry_SYSCALL_64_after_hwframe+0x76/0x7e
The buggy address belongs to the object at ffff88811a108000
which belongs to the cache shmem_inode_cache of size 824
The buggy address is located 8 bytes inside of
freed 824-byte region [ffff88811a108000, ffff88811a108338)
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11a108
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x4000000000000040(head|zone=1)
page_type: f5(slab)
raw: 4000000000000040 ffff888101a42a00 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000110011 00000001f5000000 0000000000000000
head: 4000000000000040 ffff888101a42a00 dead000000000122 0000000000000000
head: 0000000000000000 0000000000110011 00000001f5000000 0000000000000000
head: 4000000000000002 ffffea0004684201 ffffffffffffffff 0000000000000000
head: 0000000000000004 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 4039, tgid 4039 (syz-executor), ts 223454157043, free_ts 223395745991
set_page_owner include/linux/page_owner.h:35 [inline]
post_alloc_hook+0x37d/0x3b0 mm/page_alloc.c:1863
prep_new_page+0x2d/0x180 mm/page_alloc.c:1871
get_page_from_freelist+0x4aea/0x4ba0 mm/page_alloc.c:3948
__alloc_pages_noprof+0x35a/0x7e0 mm/page_alloc.c:5315
alloc_slab_page+0x6b/0x1e0 mm/slub.c:-1
allocate_slab+0x69/0x430 mm/slub.c:2687
new_slab mm/slub.c:2741 [inline]
___slab_alloc+0x591/0x8c0 mm/slub.c:3934
__slab_alloc mm/slub.c:4025 [inline]
__slab_alloc_node mm/slub.c:4078 [inline]
slab_alloc_node mm/slub.c:4239 [inline]
kmem_cache_alloc_lru_noprof+0x295/0x410 mm/slub.c:4272
shmem_alloc_inode+0x3b/0xd0 mm/shmem.c:4892
alloc_inode+0x7d/0x270 fs/inode.c:269
new_inode_pseudo fs/inode.c:1117 [inline]
new_inode+0x25/0x1e0 fs/inode.c:1136
__shmem_get_inode mm/shmem.c:2921 [inline]
shmem_get_inode+0x352/0xc10 mm/shmem.c:3018
shmem_symlink+0xa6/0x4e0 mm/shmem.c:3932
vfs_symlink+0x3f4/0x620 fs/namei.c:4623
do_symlinkat+0x1ba/0x400 fs/namei.c:4649
__do_sys_symlinkat fs/namei.c:4665 [inline]
__se_sys_symlinkat fs/namei.c:4662 [inline]
__x64_sys_symlinkat+0x99/0xb0 fs/namei.c:4662
page last free pid 10 tgid 10 stack trace:
reset_page_owner include/linux/page_owner.h:28 [inline]
free_pages_prepare mm/page_alloc.c:1390 [inline]
free_unref_page+0xbb8/0xf70 mm/page_alloc.c:2876
__folio_put+0x272/0x2c0 mm/swap.c:115
folio_put include/linux/mm.h:1589 [inline]
free_large_kmalloc+0xb7/0x110 mm/slub.c:4842
kfree+0x209/0x440 mm/slub.c:4869
usbhid_disconnect+0xab/0xc0 drivers/hid/usbhid/hid-core.c:1479
usb_unbind_interface+0x2ad/0xa40 drivers/usb/core/driver.c:462
device_remove drivers/base/dd.c:569 [inline]
__device_release_driver drivers/base/dd.c:1272 [inline]
device_release_driver_internal+0x525/0x830 drivers/base/dd.c:1295
device_release_driver+0x1d/0x30 drivers/base/dd.c:1318
bus_remove_device+0x34f/0x370 drivers/base/bus.c:576
device_del+0x583/0xcf0 drivers/base/core.c:3881
usb_disable_device+0x3af/0x770 drivers/usb/core/message.c:1476
usb_disconnect+0x331/0x950 drivers/usb/core/hub.c:2353
hub_port_connect drivers/usb/core/hub.c:5414 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5714 [inline]
port_event drivers/usb/core/hub.c:5878 [inline]
hub_event+0x1ad5/0x4360 drivers/usb/core/hub.c:5960
process_one_work kernel/workqueue.c:3273 [inline]
process_scheduled_works+0x7f7/0x1060 kernel/workqueue.c:3354
worker_thread+0xc99/0x13f0 kernel/workqueue.c:3435
kthread+0x2c7/0x360 kernel/kthread.c:389
Memory state around the buggy address:
ffff88811a107f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff88811a107f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88811a108000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88811a108080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88811a108100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
BUG: unable to handle page fault for address: 0000000000200230
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 800000011d8a9067 P4D 800000011d8a9067 PUD 0
Oops: Oops: 0002 [#1] PREEMPT SMP KASAN PTI
CPU: 1 UID: 0 PID: 4386 Comm: syz.4.1375 Tainted: G B syzkaller #0 02f2c9a1947d185dcc234937001f7d1e6f97c77a
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:arch_atomic_inc include/linux/instrumented.h:96 [inline]
RIP: 0010:raw_atomic_inc include/linux/atomic/atomic-arch-fallback.h:992 [inline]
RIP: 0010:atomic_inc include/linux/atomic/atomic-instrumented.h:436 [inline]
RIP: 0010:__pm_runtime_resume+0x49/0xa0 drivers/base/power/runtime.c:1177
Code: ff e8 9b f9 3f fe 89 d8 83 e0 04 75 07 e8 4f f5 3f fe eb 1e e8 48 f5 3f fe 49 8d be e0 01 00 00 be 04 00 00 00 e8 f7 d6 98 fe 41 ff 86 e0 01 00 00 4d 8d be 14 01 00 00 4c 89 ff e8 90 3f 5f
RSP: 0018:ffffc90000dff6a8 EFLAGS: 00010202
RAX: 0000000000000001 RBX: 0000000000000004 RCX: ffffffff83477c89
RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000200230
RBP: ffffc90000dff6c8 R08: 0000000000200234 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1176f29 R12: 0000000000000000
R13: ffffffff8680c8e0 R14: 0000000000200050 R15: dffffc0000000000
FS: 00007faa5c3c96c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000200230 CR3: 000000012192e000 CR4: 00000000003526b0
DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000002
DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
pm_runtime_resume_and_get include/linux/pm_runtime.h:436 [inline]
usb_autopm_get_interface+0x25/0xf0 drivers/usb/core/driver.c:1888
usbhid_power+0x84/0xd0 drivers/hid/usbhid/hid-core.c:1284
hid_hw_power include/linux/hid.h:1174 [inline]
hidraw_open+0x257/0x960 drivers/hid/hidraw.c:302
chrdev_open+0x4e8/0x610 fs/char_dev.c:414
do_dentry_open+0x97f/0x1510 fs/open.c:960
vfs_open+0x86/0x240 fs/open.c:1092
do_open fs/namei.c:3782 [inline]
path_openat+0x2c49/0x35a0 fs/namei.c:3941
do_filp_open+0x1f2/0x440 fs/namei.c:3968
do_sys_openat2+0x134/0x1d0 fs/open.c:1440
do_sys_open fs/open.c:1455 [inline]
__do_sys_openat fs/open.c:1471 [inline]
__se_sys_openat fs/open.c:1466 [inline]
__x64_sys_openat+0x13a/0x170 fs/open.c:1466
x64_sys_call+0xe69/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:258
do_syscall_x64 arch/x86/entry/common.c:47 [inline]
do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7faa5b55e90e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007faa5c3c8b28 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007faa5c3c96c0 RCX: 00007faa5b55e90e
RDX: 0000000000000000 RSI: 00007faa5c3c8c00 RDI: ffffffffffffff9c
RBP: 00007faa5c3c8c00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: cccccccccccccccd
R13: 00007faa5b826038 R14: 00007faa5b825fa0 R15: 00007fffc91ecf58
Modules linked in:
CR2: 0000000000200230
---[ end trace 0000000000000000 ]---
RIP: 0010:arch_atomic_inc include/linux/instrumented.h:96 [inline]
RIP: 0010:raw_atomic_inc include/linux/atomic/atomic-arch-fallback.h:992 [inline]
RIP: 0010:atomic_inc include/linux/atomic/atomic-instrumented.h:436 [inline]
RIP: 0010:__pm_runtime_resume+0x49/0xa0 drivers/base/power/runtime.c:1177
Code: ff e8 9b f9 3f fe 89 d8 83 e0 04 75 07 e8 4f f5 3f fe eb 1e e8 48 f5 3f fe 49 8d be e0 01 00 00 be 04 00 00 00 e8 f7 d6 98 fe 41 ff 86 e0 01 00 00 4d 8d be 14 01 00 00 4c 89 ff e8 90 3f 5f
RSP: 0018:ffffc90000dff6a8 EFLAGS: 00010202
RAX: 0000000000000001 RBX: 0000000000000004 RCX: ffffffff83477c89
RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000200230
RBP: ffffc90000dff6c8 R08: 0000000000200234 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1176f29 R12: 0000000000000000
R13: ffffffff8680c8e0 R14: 0000000000200050 R15: dffffc0000000000
FS: 00007faa5c3c96c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000200230 CR3: 000000012192e000 CR4: 00000000003526b0
DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000002
DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: ff ljmp (bad)
1: e8 9b f9 3f fe call 0xfe3ff9a1
6: 89 d8 mov %ebx,%eax
8: 83 e0 04 and $0x4,%eax
b: 75 07 jne 0x14
d: e8 4f f5 3f fe call 0xfe3ff561
12: eb 1e jmp 0x32
14: e8 48 f5 3f fe call 0xfe3ff561
19: 49 8d be e0 01 00 00 lea 0x1e0(%r14),%rdi
20: be 04 00 00 00 mov $0x4,%esi
25: e8 f7 d6 98 fe call 0xfe98d721
* 2a: f0 41 ff 86 e0 01 00 lock incl 0x1e0(%r14) <-- trapping instruction
31: 00
32: 4d 8d be 14 01 00 00 lea 0x114(%r14),%r15
39: 4c 89 ff mov %r15,%rdi
3c: e8 .byte 0xe8
3d: 90 nop
3e: 3f (bad)
3f: 5f pop %rdi