================================================================== BUG: KASAN: null-ptr-deref in report_descriptor_read+0xb5/0x100 drivers/hid/hid-core.c:2226 Read of size 7 at addr 0000000000000000 by task fido_id/6785 CPU: 0 UID: 0 PID: 6785 Comm: fido_id Tainted: G L syzkaller #0 PREEMPT_{RT,(full)} Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 kasan_report+0x117/0x150 mm/kasan/report.c:595 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x264/0x2c0 mm/kasan/generic.c:200 __asan_memcpy+0x29/0x70 mm/kasan/shadow.c:105 report_descriptor_read+0xb5/0x100 drivers/hid/hid-core.c:2226 kernfs_file_read_iter fs/kernfs/file.c:269 [inline] kernfs_fop_read_iter+0x452/0x6b0 fs/kernfs/file.c:298 new_sync_read fs/read_write.c:493 [inline] vfs_read+0x58b/0xa80 fs/read_write.c:574 ksys_read+0x156/0x270 fs/read_write.c:717 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fcd913b0407 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:00007ffff1fdfcb0 EFLAGS: 00000202 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00007fcd912c2880 RCX: 00007fcd913b0407 RDX: 0000000000001000 RSI: 00007ffff1fdfd00 RDI: 0000000000000004 RBP: 000055fb6ff6e730 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 000055fb6ff6d930 R13: 00007ffff1fdfd00 R14: 0000000000000004 R15: 000055fb3e57b4d8 ==================================================================