hid-u2fzero 0003:10C4:8ACF.0001: unknown main item tag 0x0 hid-u2fzero 0003:10C4:8ACF.0001: unknown main item tag 0x0 hid-u2fzero 0003:10C4:8ACF.0001: hidraw0: USB HID v0.00 Device [HID 10c4:8acf] on usb-dummy_hcd.2-1/input6 hid-u2fzero 0003:10C4:8ACF.0001: U2F Zero LED initialised general protection fault, probably for non-canonical address 0xdffffc0000000015: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x00000000000000a8-0x00000000000000af] CPU: 1 PID: 3683 Comm: kworker/1:5 Not tainted 6.1.106-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Workqueue: usb_hub_wq hub_event RIP: 0010:u2fzero_recv drivers/hid/hid-u2fzero.c:137 [inline] RIP: 0010:u2fzero_rng_read+0x27d/0x710 drivers/hid/hid-u2fzero.c:223 Code: 68 fd ff ff 4d 89 f5 49 c1 ed 03 43 80 7c 3d 00 00 74 08 4c 89 f7 e8 f2 72 c6 f9 bb a8 00 00 00 49 03 1e 48 89 d8 48 c1 e8 03 <42> 80 3c 38 00 74 08 48 89 df e8 54 73 c6 f9 48 8d 84 24 80 00 00 RSP: 0018:ffffc9000419e720 EFLAGS: 00010202 RAX: 0000000000000015 RBX: 00000000000000a8 RCX: 0000000000000000 RDX: 000000000000003b RSI: 0000000000000000 RDI: ffff888074f20d69 RBP: ffffc9000419e8d0 R08: dffffc0000000000 R09: ffff888074f20d2e R10: ffffffffffffffff R11: dffffc0000000001 R12: ffff88807c5e63e0 R13: 1ffff1100f8bcc06 R14: ffff88807c5e6030 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7c126456c0 CR3: 000000005f549000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rng_get_data drivers/char/hw_random/core.c:201 [inline] add_early_randomness+0x78/0x140 drivers/char/hw_random/core.c:73 hwrng_register+0x3a0/0x440 drivers/char/hw_random/core.c:593 devm_hwrng_register+0x43/0xb0 drivers/char/hw_random/core.c:665 u2fzero_probe+0x31a/0x410 drivers/hid/hid-u2fzero.c:359 hid_device_probe+0x298/0x3a0 drivers/hid/hid-core.c:2630 really_probe+0x2ab/0xcb0 drivers/base/dd.c:639 __driver_probe_device+0x1a2/0x3d0 drivers/base/dd.c:785 driver_probe_device+0x50/0x420 drivers/base/dd.c:815 __device_attach_driver+0x2cf/0x510 drivers/base/dd.c:943 bus_for_each_drv+0x183/0x200 drivers/base/bus.c:427 __device_attach+0x359/0x570 drivers/base/dd.c:1015 bus_probe_device+0xba/0x1e0 drivers/base/bus.c:487 device_add+0xb48/0xfd0 drivers/base/core.c:3692 hid_add_device+0x3a5/0x510 drivers/hid/hid-core.c:2782 usbhid_probe+0xb2d/0xeb0 drivers/hid/usbhid/hid-core.c:1424 usb_probe_interface+0x5c0/0xaf0 drivers/usb/core/driver.c:396 really_probe+0x2ab/0xcb0 drivers/base/dd.c:639 __driver_probe_device+0x1a2/0x3d0 drivers/base/dd.c:785 driver_probe_device+0x50/0x420 drivers/base/dd.c:815 __device_attach_driver+0x2cf/0x510 drivers/base/dd.c:943 bus_for_each_drv+0x183/0x200 drivers/base/bus.c:427 __device_attach+0x359/0x570 drivers/base/dd.c:1015 bus_probe_device+0xba/0x1e0 drivers/base/bus.c:487 device_add+0xb48/0xfd0 drivers/base/core.c:3692 usb_set_configuration+0x19dd/0x2020 drivers/usb/core/message.c:2165 usb_generic_driver_probe+0x84/0x140 drivers/usb/core/generic.c:238 usb_probe_device+0x130/0x260 drivers/usb/core/driver.c:293 really_probe+0x2ab/0xcb0 drivers/base/dd.c:639 __driver_probe_device+0x1a2/0x3d0 drivers/base/dd.c:785 driver_probe_device+0x50/0x420 drivers/base/dd.c:815 __device_attach_driver+0x2cf/0x510 drivers/base/dd.c:943 bus_for_each_drv+0x183/0x200 drivers/base/bus.c:427 __device_attach+0x359/0x570 drivers/base/dd.c:1015 bus_probe_device+0xba/0x1e0 drivers/base/bus.c:487 device_add+0xb48/0xfd0 drivers/base/core.c:3692 usb_new_device+0xbdd/0x18f0 drivers/usb/core/hub.c:2620 hub_port_connect drivers/usb/core/hub.c:5477 [inline] hub_port_connect_change drivers/usb/core/hub.c:5617 [inline] port_event drivers/usb/core/hub.c:5773 [inline] hub_event+0x2efe/0x5730 drivers/usb/core/hub.c:5855 process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292 worker_thread+0xa47/0x1200 kernel/workqueue.c:2439 kthread+0x28d/0x320 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:u2fzero_recv drivers/hid/hid-u2fzero.c:137 [inline] RIP: 0010:u2fzero_rng_read+0x27d/0x710 drivers/hid/hid-u2fzero.c:223 Code: 68 fd ff ff 4d 89 f5 49 c1 ed 03 43 80 7c 3d 00 00 74 08 4c 89 f7 e8 f2 72 c6 f9 bb a8 00 00 00 49 03 1e 48 89 d8 48 c1 e8 03 <42> 80 3c 38 00 74 08 48 89 df e8 54 73 c6 f9 48 8d 84 24 80 00 00 RSP: 0018:ffffc9000419e720 EFLAGS: 00010202 RAX: 0000000000000015 RBX: 00000000000000a8 RCX: 0000000000000000 RDX: 000000000000003b RSI: 0000000000000000 RDI: ffff888074f20d69 RBP: ffffc9000419e8d0 R08: dffffc0000000000 R09: ffff888074f20d2e R10: ffffffffffffffff R11: dffffc0000000001 R12: ffff88807c5e63e0 R13: 1ffff1100f8bcc06 R14: ffff88807c5e6030 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2cf7bbcf98 CR3: 000000002782c000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 68 fd ff ff 4d push $0x4dfffffd 5: 89 f5 mov %esi,%ebp 7: 49 c1 ed 03 shr $0x3,%r13 b: 43 80 7c 3d 00 00 cmpb $0x0,0x0(%r13,%r15,1) 11: 74 08 je 0x1b 13: 4c 89 f7 mov %r14,%rdi 16: e8 f2 72 c6 f9 call 0xf9c6730d 1b: bb a8 00 00 00 mov $0xa8,%ebx 20: 49 03 1e add (%r14),%rbx 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 48 89 df mov %rbx,%rdi 34: e8 54 73 c6 f9 call 0xf9c6738d 39: 48 rex.W 3a: 8d .byte 0x8d 3b: 84 24 80 test %ah,(%rax,%rax,4)