================================================================== BUG: KASAN: slab-use-after-free in report_descriptor_read+0xbb/0x100 drivers/hid/hid-core.c:2272 Read of size 6 at addr ffff888087739e00 by task fido_id/25787 CPU: 1 UID: 0 PID: 25787 Comm: fido_id Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/10/2026 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 check_region_inline mm/kasan/generic.c:186 [inline] kasan_check_range+0x10f/0x1e0 mm/kasan/generic.c:200 __asan_memcpy+0x23/0x60 mm/kasan/shadow.c:105 report_descriptor_read+0xbb/0x100 drivers/hid/hid-core.c:2272 sysfs_kf_bin_read+0x156/0x210 fs/sysfs/file.c:102 kernfs_file_read_iter fs/kernfs/file.c:262 [inline] kernfs_fop_read_iter+0x32b/0x610 fs/kernfs/file.c:291 new_sync_read fs/read_write.c:493 [inline] vfs_read+0x82e/0xb40 fs/read_write.c:574 ksys_read+0x12a/0x250 fs/read_write.c:716 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd72b0a7407 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:00007ffd5c6fef50 EFLAGS: 00000202 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00007fd72b89f880 RCX: 00007fd72b0a7407 RDX: 0000000000001000 RSI: 00007ffd5c6fefa0 RDI: 0000000000000004 RBP: 00005568d33972c0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 00005568d33964c0 R13: 00007ffd5c6fefa0 R14: 0000000000000004 R15: 00005568cb90e4d8 Allocated by task 19311: 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:398 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:415 kasan_kmalloc include/linux/kasan.h:263 [inline] __do_kmalloc_node mm/slub.c:5362 [inline] __kmalloc_node_track_caller_noprof+0x331/0x830 mm/slub.c:5497 kmemdup_noprof+0x29/0x60 mm/util.c:138 kmemdup_noprof include/linux/fortify-string.h:715 [inline] hid_open_report+0x214/0x810 drivers/hid/hid-core.c:1376 hid_parse include/linux/hid.h:1206 [inline] kye_probe+0x21/0x4d0 drivers/hid/hid-kye.c:579 __hid_device_probe drivers/hid/hid-core.c:2829 [inline] hid_device_probe+0x50e/0x800 drivers/hid/hid-core.c:2866 call_driver_probe drivers/base/dd.c:628 [inline] really_probe+0x241/0xa60 drivers/base/dd.c:706 __driver_probe_device+0x20e/0x450 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:3772 hid_add_device+0x2bf/0x440 drivers/hid/hid-core.c:3010 usbhid_probe+0xa64/0x10b0 drivers/hid/usbhid/hid-core.c:1452 usb_probe_interface+0x303/0x8f0 drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:628 [inline] really_probe+0x241/0xa60 drivers/base/dd.c:706 __driver_probe_device+0x20e/0x450 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:3772 usb_set_configuration+0xd97/0x1c60 drivers/usb/core/message.c:2268 usb_generic_driver_probe+0xa1/0xe0 drivers/usb/core/generic.c:250 usb_probe_device+0xef/0x400 drivers/usb/core/driver.c:291 call_driver_probe drivers/base/dd.c:628 [inline] really_probe+0x241/0xa60 drivers/base/dd.c:706 __driver_probe_device+0x20e/0x450 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:3772 usb_new_device.cold+0x685/0x115c drivers/usb/core/hub.c:2695 hub_port_connect drivers/usb/core/hub.c:5567 [inline] hub_port_connect_change drivers/usb/core/hub.c:5707 [inline] port_event drivers/usb/core/hub.c:5871 [inline] hub_event+0x30a3/0x4a60 drivers/usb/core/hub.c:5953 process_one_work+0xa23/0x1940 kernel/workqueue.c:3322 process_scheduled_works kernel/workqueue.c:3405 [inline] worker_thread+0x5ef/0xe50 kernel/workqueue.c:3486 kthread+0x370/0x450 kernel/kthread.c:436 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 The buggy address belongs to the object at ffff888087739e00 which belongs to the cache kmalloc-8 of size 8 The buggy address is located 0 bytes inside of freed 8-byte region [ffff888087739e00, ffff888087739e08) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x87739 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000000 ffff88813fe21500 dead000000000100 dead000000000122 raw: 0000000000000000 0000000800800080 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 0x1d2cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 15093, tgid 15093 (syz-executor), ts 882186335347, free_ts 882186324045 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0xfd/0x120 mm/page_alloc.c:1859 prep_new_page mm/page_alloc.c:1867 [inline] get_page_from_freelist+0xf48/0x3530 mm/page_alloc.c:3946 __alloc_frozen_pages_noprof+0x299/0x2dc0 mm/page_alloc.c:5304 alloc_slab_page mm/slub.c:3294 [inline] allocate_slab mm/slub.c:3408 [inline] new_slab+0xa2/0x650 mm/slub.c:3454 refill_objects+0xe3/0x410 mm/slub.c:7338 refill_sheaf mm/slub.c:2832 [inline] __pcs_replace_empty_main+0x376/0x680 mm/slub.c:4703 alloc_from_pcs mm/slub.c:4801 [inline] slab_alloc_node mm/slub.c:4933 [inline] __do_kmalloc_node mm/slub.c:5361 [inline] __kmalloc_node_noprof+0x681/0x830 mm/slub.c:5374 _kmalloc_node_noprof include/linux/slab.h:1178 [inline] __vmalloc_area_node mm/vmalloc.c:3871 [inline] __vmalloc_node_range_noprof+0x409/0x1630 mm/vmalloc.c:4082 __vmalloc_node_noprof+0xad/0xf0 mm/vmalloc.c:4143 alloc_counters net/ipv4/netfilter/ip_tables.c:799 [inline] copy_entries_to_user net/ipv4/netfilter/ip_tables.c:821 [inline] get_entries net/ipv4/netfilter/ip_tables.c:1020 [inline] do_ipt_get_ctl+0x7e0/0xbf0 net/ipv4/netfilter/ip_tables.c:1669 nf_getsockopt+0x7c/0xe0 net/netfilter/nf_sockopt.c:116 ip_getsockopt+0x192/0x1e0 net/ipv4/ip_sockglue.c:1777 tcp_getsockopt+0xa1/0x110 net/ipv4/tcp.c:4864 do_sock_getsockopt+0x50a/0x6e0 net/socket.c:2474 __sys_getsockopt+0x148/0x260 net/socket.c:2505 __do_sys_getsockopt net/socket.c:2512 [inline] __se_sys_getsockopt net/socket.c:2509 [inline] __x64_sys_getsockopt+0xbd/0x160 net/socket.c:2509 page last free pid 15093 tgid 15093 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] __free_pages_prepare mm/page_alloc.c:1406 [inline] __free_frozen_pages+0x79f/0x1090 mm/page_alloc.c:2950 __kasan_populate_vmalloc_do mm/kasan/shadow.c:393 [inline] __kasan_populate_vmalloc+0x1ea/0x210 mm/kasan/shadow.c:424 kasan_populate_vmalloc include/linux/kasan.h:580 [inline] alloc_vmap_area+0x95d/0x2bb0 mm/vmalloc.c:2123 __get_vm_area_node+0x1ca/0x330 mm/vmalloc.c:3226 __vmalloc_node_range_noprof+0x228/0x1630 mm/vmalloc.c:4042 __vmalloc_node_noprof+0xad/0xf0 mm/vmalloc.c:4143 alloc_counters net/ipv4/netfilter/ip_tables.c:799 [inline] copy_entries_to_user net/ipv4/netfilter/ip_tables.c:821 [inline] get_entries net/ipv4/netfilter/ip_tables.c:1020 [inline] do_ipt_get_ctl+0x7e0/0xbf0 net/ipv4/netfilter/ip_tables.c:1669 nf_getsockopt+0x7c/0xe0 net/netfilter/nf_sockopt.c:116 ip_getsockopt+0x192/0x1e0 net/ipv4/ip_sockglue.c:1777 tcp_getsockopt+0xa1/0x110 net/ipv4/tcp.c:4864 do_sock_getsockopt+0x50a/0x6e0 net/socket.c:2474 __sys_getsockopt+0x148/0x260 net/socket.c:2505 __do_sys_getsockopt net/socket.c:2512 [inline] __se_sys_getsockopt net/socket.c:2509 [inline] __x64_sys_getsockopt+0xbd/0x160 net/socket.c:2509 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff888087739d00: 05 fc fc fc 03 fc fc fc fa fc fc fc fa fc fc fc ffff888087739d80: 05 fc fc fc 05 fc fc fc 06 fc fc fc fa fc fc fc >ffff888087739e00: fb fc fc fc fa fc fc fc 05 fc fc fc 06 fc fc fc ^ ffff888087739e80: fa fc fc fc 05 fc fc fc 02 fc fc fc 06 fc fc fc ffff888087739f00: 05 fc fc fc 00 fc fc fc fa fc fc fc fa fc fc fc ==================================================================