==================================================================
BUG: KASAN: slab-use-after-free in read_report_descriptor+0xbf/0x100 drivers/hid/hid-core.c:2195
Read of size 8 at addr ffff8881093b33a0 by task fido_id/2734

CPU: 1 UID: 0 PID: 2734 Comm: fido_id Not tainted syzkaller #0 bc0cd8c799b707a1ad12ca137e44006be90c32c1
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Call Trace:
 <TASK>
 __dump_stack+0x21/0x30 lib/dump_stack.c:94
 dump_stack_lvl+0x10c/0x190 lib/dump_stack.c:120
 print_address_description+0x71/0x200 mm/kasan/report.c:377
 print_report+0x4a/0x70 mm/kasan/report.c:479
 kasan_report+0x163/0x1a0 mm/kasan/report.c:592
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x299/0x2a0 mm/kasan/generic.c:189
 __asan_memcpy+0x31/0x80 mm/kasan/shadow.c:105
 read_report_descriptor+0xbf/0x100 drivers/hid/hid-core.c:2195
 sysfs_kf_bin_read+0x1c3/0x200 fs/sysfs/file.c:97
 kernfs_file_read_iter fs/kernfs/file.c:251 [inline]
 kernfs_fop_read_iter+0x310/0x4f0 fs/kernfs/file.c:280
 new_sync_read fs/read_write.c:488 [inline]
 vfs_read+0x53d/0xb60 fs/read_write.c:569
 ksys_read+0x141/0x250 fs/read_write.c:712
 __do_sys_read fs/read_write.c:722 [inline]
 __se_sys_read fs/read_write.c:720 [inline]
 __x64_sys_read+0x7f/0x90 fs/read_write.c:720
 x64_sys_call+0x2638/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:1
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x58/0xf0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f74af8a7407
Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007fffbc7a5a80 EFLAGS: 00000202 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f74aff8e880 RCX: 00007f74af8a7407
RDX: 0000000000001000 RSI: 00007fffbc7a5ad0 RDI: 0000000000000004
RBP: 000055cf20d182c0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 000055cf20d174c0
R13: 00007fffbc7a5ad0 R14: 0000000000000004 R15: 000055cf01a4e4d8
 </TASK>

Allocated by task 571:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
 kasan_save_alloc_info+0x40/0x50 mm/kasan/generic.c:565
 poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
 __kasan_kmalloc+0x96/0xb0 mm/kasan/common.c:394
 kasan_kmalloc include/linux/kasan.h:260 [inline]
 __do_kmalloc_node mm/slub.c:4283 [inline]
 __kmalloc_node_track_caller_noprof+0x1f3/0x490 mm/slub.c:4302
 kmemdup_noprof+0x31/0x80 mm/util.c:133
 kmemdup_noprof include/linux/fortify-string.h:753 [inline]
 hid_open_report+0x266/0x1060 drivers/hid/hid-core.c:1241
 hid_parse include/linux/hid.h:1124 [inline]
 lg_probe+0x2d8/0x840 drivers/hid/hid-lg.c:783
 __hid_device_probe drivers/hid/hid-core.c:2711 [inline]
 hid_device_probe+0x2b8/0x5d0 drivers/hid/hid-core.c:2748
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x2cf/0x880 drivers/base/dd.c:657
 __driver_probe_device+0x195/0x280 drivers/base/dd.c:799
 driver_probe_device+0x54/0x3f0 drivers/base/dd.c:829
 __device_attach_driver+0x2f1/0x4b0 drivers/base/dd.c:957
 bus_for_each_drv+0x25c/0x2f0 drivers/base/bus.c:459
 __device_attach+0x2b7/0x3a0 drivers/base/dd.c:1029
 device_initial_probe+0x1e/0x30 drivers/base/dd.c:1078
 bus_probe_device+0x188/0x270 drivers/base/bus.c:534
 device_add+0x82a/0xb60 drivers/base/core.c:3692
 hid_add_device+0x39b/0x560 drivers/hid/hid-core.c:2894
 usbhid_probe+0xe15/0x1230 drivers/hid/usbhid/hid-core.c:1435
 usb_probe_interface+0x690/0xbf0 drivers/usb/core/driver.c:399
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x2cf/0x880 drivers/base/dd.c:657
 __driver_probe_device+0x195/0x280 drivers/base/dd.c:799
 driver_probe_device+0x54/0x3f0 drivers/base/dd.c:829
 __device_attach_driver+0x2f1/0x4b0 drivers/base/dd.c:957
 bus_for_each_drv+0x25c/0x2f0 drivers/base/bus.c:459
 __device_attach+0x2b7/0x3a0 drivers/base/dd.c:1029
 device_initial_probe+0x1e/0x30 drivers/base/dd.c:1078
 bus_probe_device+0x188/0x270 drivers/base/bus.c:534
 device_add+0x82a/0xb60 drivers/base/core.c:3692
 usb_set_configuration+0x1ad1/0x2030 drivers/usb/core/message.c:2210
 usb_generic_driver_probe+0x95/0x160 drivers/usb/core/generic.c:254
 usb_probe_device+0x1cb/0x370 drivers/usb/core/driver.c:294
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x2cf/0x880 drivers/base/dd.c:657
 __driver_probe_device+0x195/0x280 drivers/base/dd.c:799
 driver_probe_device+0x54/0x3f0 drivers/base/dd.c:829
 __device_attach_driver+0x2f1/0x4b0 drivers/base/dd.c:957
 bus_for_each_drv+0x25c/0x2f0 drivers/base/bus.c:459
 __device_attach+0x2b7/0x3a0 drivers/base/dd.c:1029
 device_initial_probe+0x1e/0x30 drivers/base/dd.c:1078
 bus_probe_device+0x188/0x270 drivers/base/bus.c:534
 device_add+0x82a/0xb60 drivers/base/core.c:3692
 usb_new_device+0x9ed/0x1590 drivers/usb/core/hub.c:2693
 hub_port_connect drivers/usb/core/hub.c:5564 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5704 [inline]
 port_event drivers/usb/core/hub.c:5868 [inline]
 hub_event+0x2758/0x4210 drivers/usb/core/hub.c:5950
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0x7d2/0x1020 kernel/workqueue.c:3310
 worker_thread+0x99f/0xd90 kernel/workqueue.c:3391
 kthread+0x2ca/0x370 kernel/kthread.c:389
 ret_from_fork+0x64/0xa0 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

Freed by task 571:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
 kasan_save_free_info+0x4a/0x60 mm/kasan/generic.c:579
 poison_slab_object mm/kasan/common.c:247 [inline]
 __kasan_slab_free+0x5f/0x80 mm/kasan/common.c:264
 kasan_slab_free include/linux/kasan.h:233 [inline]
 slab_free_hook mm/slub.c:2355 [inline]
 slab_free mm/slub.c:4598 [inline]
 kfree+0x183/0x3b0 mm/slub.c:4746
 hid_close_report+0x628/0x6f0 drivers/hid/hid-core.c:688
 __hid_device_probe drivers/hid/hid-core.c:2728 [inline]
 hid_device_probe+0x517/0x5d0 drivers/hid/hid-core.c:2748
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x2cf/0x880 drivers/base/dd.c:657
 __driver_probe_device+0x195/0x280 drivers/base/dd.c:799
 driver_probe_device+0x54/0x3f0 drivers/base/dd.c:829
 __device_attach_driver+0x2f1/0x4b0 drivers/base/dd.c:957
 bus_for_each_drv+0x25c/0x2f0 drivers/base/bus.c:459
 __device_attach+0x2b7/0x3a0 drivers/base/dd.c:1029
 device_initial_probe+0x1e/0x30 drivers/base/dd.c:1078
 bus_probe_device+0x188/0x270 drivers/base/bus.c:534
 device_add+0x82a/0xb60 drivers/base/core.c:3692
 hid_add_device+0x39b/0x560 drivers/hid/hid-core.c:2894
 usbhid_probe+0xe15/0x1230 drivers/hid/usbhid/hid-core.c:1435
 usb_probe_interface+0x690/0xbf0 drivers/usb/core/driver.c:399
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x2cf/0x880 drivers/base/dd.c:657
 __driver_probe_device+0x195/0x280 drivers/base/dd.c:799
 driver_probe_device+0x54/0x3f0 drivers/base/dd.c:829
 __device_attach_driver+0x2f1/0x4b0 drivers/base/dd.c:957
 bus_for_each_drv+0x25c/0x2f0 drivers/base/bus.c:459
 __device_attach+0x2b7/0x3a0 drivers/base/dd.c:1029
 device_initial_probe+0x1e/0x30 drivers/base/dd.c:1078
 bus_probe_device+0x188/0x270 drivers/base/bus.c:534
 device_add+0x82a/0xb60 drivers/base/core.c:3692
 usb_set_configuration+0x1ad1/0x2030 drivers/usb/core/message.c:2210
 usb_generic_driver_probe+0x95/0x160 drivers/usb/core/generic.c:254
 usb_probe_device+0x1cb/0x370 drivers/usb/core/driver.c:294
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x2cf/0x880 drivers/base/dd.c:657
 __driver_probe_device+0x195/0x280 drivers/base/dd.c:799
 driver_probe_device+0x54/0x3f0 drivers/base/dd.c:829
 __device_attach_driver+0x2f1/0x4b0 drivers/base/dd.c:957
 bus_for_each_drv+0x25c/0x2f0 drivers/base/bus.c:459
 __device_attach+0x2b7/0x3a0 drivers/base/dd.c:1029
 device_initial_probe+0x1e/0x30 drivers/base/dd.c:1078
 bus_probe_device+0x188/0x270 drivers/base/bus.c:534
 device_add+0x82a/0xb60 drivers/base/core.c:3692
 usb_new_device+0x9ed/0x1590 drivers/usb/core/hub.c:2693
 hub_port_connect drivers/usb/core/hub.c:5564 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5704 [inline]
 port_event drivers/usb/core/hub.c:5868 [inline]
 hub_event+0x2758/0x4210 drivers/usb/core/hub.c:5950
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0x7d2/0x1020 kernel/workqueue.c:3310
 worker_thread+0x99f/0xd90 kernel/workqueue.c:3391
 kthread+0x2ca/0x370 kernel/kthread.c:389
 ret_from_fork+0x64/0xa0 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

The buggy address belongs to the object at ffff8881093b33a0
 which belongs to the cache kmalloc-8 of size 8
The buggy address is located 0 bytes inside of
 freed 8-byte region [ffff8881093b33a0, ffff8881093b33a8)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1093b3
flags: 0x4000000000000000(zone=1)
page_type: f5(slab)
raw: 4000000000000000 ffff888100041500 dead000000000100 dead000000000122
raw: 0000000000000000 0000000000800080 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 0x52820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 1, tgid 1 (init), ts 4772296452, free_ts 0
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x249/0x3a0 mm/page_alloc.c:1554
 prep_new_page mm/page_alloc.c:1562 [inline]
 get_page_from_freelist+0x3d40/0x3de0 mm/page_alloc.c:3507
 __alloc_pages_noprof+0x23a/0x4e0 mm/page_alloc.c:4793
 alloc_slab_page include/linux/sched.h:-1 [inline]
 allocate_slab+0xbe/0x540 mm/slub.c:2595
 new_slab mm/slub.c:2649 [inline]
 ___slab_alloc+0x59a/0x920 mm/slub.c:3837
 __slab_alloc mm/slub.c:3927 [inline]
 __slab_alloc_node mm/slub.c:3980 [inline]
 slab_alloc_node mm/slub.c:4141 [inline]
 __do_kmalloc_node mm/slub.c:4282 [inline]
 __kmalloc_node_track_caller_noprof+0x278/0x490 mm/slub.c:4302
 kstrdup+0x88/0x100 mm/util.c:64
 get_permissions_callback+0x4a/0xa0 security/selinux/ss/services.c:3398
 hashtab_map+0x10d/0x210 security/selinux/ss/hashtab.c:97
 security_get_permissions+0x16a/0x390 security/selinux/ss/services.c:3430
 sel_make_perm_files security/selinux/selinuxfs.c:1775 [inline]
 sel_make_class_dir_entries security/selinux/selinuxfs.c:1835 [inline]
 sel_make_classes security/selinux/selinuxfs.c:1864 [inline]
 sel_make_policy_nodes+0xcd7/0x12d0 security/selinux/selinuxfs.c:537
 sel_write_load+0x38f/0x560 security/selinux/selinuxfs.c:609
 vfs_write+0x392/0xe40 fs/read_write.c:681
 ksys_write+0x141/0x250 fs/read_write.c:736
 __do_sys_write fs/read_write.c:748 [inline]
 __se_sys_write fs/read_write.c:745 [inline]
 __x64_sys_write+0x7f/0x90 fs/read_write.c:745
 x64_sys_call+0x271c/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:2
page_owner free stack trace missing

Memory state around the buggy address:
 ffff8881093b3280: fa fc fc fc fa fc fc fc fa fc fc fc fa fc fc fc
 ffff8881093b3300: fa fc fc fc fa fc fc fc fa fc fc fc fa fc fc fc
>ffff8881093b3380: fa fc fc fc fa fc fc fc fa fc fc fc fa fc fc fc
                               ^
 ffff8881093b3400: fa fc fc fc fa fc fc fc fa fc fc fc fa fc fc fc
 ffff8881093b3480: fa fc fc fc fa fc fc fc fa fc fc fc fa fc fc fc
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