==================================================================
BUG: KASAN: slab-use-after-free in usbhid_power+0x7c/0xd0 drivers/hid/usbhid/hid-core.c:1284
Read of size 8 at addr ffff88810dbc0008 by task syz.1.1481/5046
CPU: 0 UID: 0 PID: 5046 Comm: syz.1.1481 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: 0033:0x7f2d2175e90e
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:00007f2d2260bb28 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f2d2260c6c0 RCX: 00007f2d2175e90e
RDX: 000000000014a002 RSI: 00007f2d2260bc00 RDI: ffffffffffffff9c
RBP: 00007f2d2260bc00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: cccccccccccccccd
R13: 00007f2d21a26128 R14: 00007f2d21a26090 R15: 00007ffc27fa29b8
Allocated by task 4666:
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]
kmem_cache_alloc_bulk_noprof+0x264/0x480 mm/slub.c:5123
__io_alloc_req_refill+0xbf/0x4b0 io_uring/io_uring.c:962
io_alloc_req io_uring/io_uring.h:410 [inline]
io_submit_sqes+0xc73/0x1b70 io_uring/io_uring.c:2362
__do_sys_io_uring_enter io_uring/io_uring.c:3408 [inline]
__se_sys_io_uring_enter+0x302/0x25c0 io_uring/io_uring.c:3339
__x64_sys_io_uring_enter+0xe9/0x110 io_uring/io_uring.c:3339
x64_sys_call+0x2d28/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:427
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_after_rcu_debug+0x11a/0x280 mm/slub.c:4773
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
slab_free_hook mm/slub.c:2406 [inline]
slab_free mm/slub.c:4714 [inline]
kmem_cache_free+0x49e/0x4f0 mm/slub.c:4825
io_req_caches_free+0xb8/0x250 io_uring/io_uring.c:2778
io_ring_exit_work+0x356/0x83b io_uring/io_uring.c:2985
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
ret_from_fork+0x67/0xa0 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
The buggy address belongs to the object at ffff88810dbc0000
which belongs to the cache io_kiocb of size 248
The buggy address is located 8 bytes inside of
freed 248-byte region [ffff88810dbc0000, ffff88810dbc00f8)
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10dbc0
flags: 0x4000000000000000(zone=1)
page_type: f5(slab)
raw: 4000000000000000 ffff888100ae6a00 dead000000000122 0000000000000000
raw: 0000000000000000 00000000000c000c 00000001f5000000 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 0x152cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 4666, tgid 4665 (syz.1.1347), ts 219398668527, free_ts 216147653574
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
__kmem_cache_alloc_bulk mm/slub.c:5043 [inline]
kmem_cache_alloc_bulk_noprof+0x13d/0x480 mm/slub.c:5115
__io_alloc_req_refill+0xbf/0x4b0 io_uring/io_uring.c:962
io_alloc_req io_uring/io_uring.h:410 [inline]
io_submit_sqes+0xc73/0x1b70 io_uring/io_uring.c:2362
__do_sys_io_uring_enter io_uring/io_uring.c:3408 [inline]
__se_sys_io_uring_enter+0x302/0x25c0 io_uring/io_uring.c:3339
__x64_sys_io_uring_enter+0xe9/0x110 io_uring/io_uring.c:3339
x64_sys_call+0x2d28/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:427
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
page last free pid 33 tgid 33 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
__free_pages+0x6b/0x3b0 mm/page_alloc.c:5402
pagetable_free include/linux/mm.h:3084 [inline]
pagetable_dtor_free include/linux/mm.h:3174 [inline]
__tlb_remove_table include/asm-generic/tlb.h:217 [inline]
__tlb_remove_table_free mm/mmu_gather.c:228 [inline]
tlb_remove_table_rcu+0x2b2/0x3d0 mm/mmu_gather.c:283
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
Memory state around the buggy address:
ffff88810dbbff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88810dbbff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88810dbc0000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88810dbc0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc
ffff88810dbc0100: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
==================================================================
BUG: kernel NULL pointer dereference, address: 0000000000000230
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 800000013407b067 P4D 800000013407b067
PUD 0
Oops: Oops: 0002 [#1] PREEMPT SMP KASAN PTI
CPU: 1 UID: 0 PID: 5046 Comm: syz.1.1481 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:ffffc9000d8e76a8 EFLAGS: 00010202
RAX: 0000000000000001 RBX: 0000000000000004 RCX: ffffffff83477c89
RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000000230
RBP: ffffc9000d8e76c8 R08: 0000000000000234 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1176f29 R12: 0000000000000000
R13: ffffffff8680c8e0 R14: 0000000000000050 R15: dffffc0000000000
FS: 00007f2d2260c6c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000230 CR3: 0000000119e9a000 CR4: 00000000003526b0
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: 0033:0x7f2d2175e90e
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:00007f2d2260bb28 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f2d2260c6c0 RCX: 00007f2d2175e90e
RDX: 000000000014a002 RSI: 00007f2d2260bc00 RDI: ffffffffffffff9c
RBP: 00007f2d2260bc00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: cccccccccccccccd
R13: 00007f2d21a26128 R14: 00007f2d21a26090 R15: 00007ffc27fa29b8
Modules linked in:
CR2: 0000000000000230
---[ 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:ffffc9000d8e76a8 EFLAGS: 00010202
RAX: 0000000000000001 RBX: 0000000000000004 RCX: ffffffff83477c89
RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000000230
RBP: ffffc9000d8e76c8 R08: 0000000000000234 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1176f29 R12: 0000000000000000
R13: ffffffff8680c8e0 R14: 0000000000000050 R15: dffffc0000000000
FS: 00007f2d2260c6c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000230 CR3: 0000000119e9a000 CR4: 00000000003526b0
----------------
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