Starting program: /usr/sbin/ssh-sk-helper -vvv
[New Thread 8648.0x1034]
[New Thread 8648.0x60]
[New Thread 8648.0x161c]
[New Thread 8648.0xe30]
debug3: ssh_msg_recv entering
debug1: main: received message len 520
debug1: process_sign: ready to sign with key ECDSA-SK, provider internal: msg len 246, compat 0x0

Thread 1 "ssh-sk-helper" hit Breakpoint 5, sshsk_sign (provider_path=0x80038cf8 "internal", key=0x80038df0, sigp=sigp@entry=0x65cbe8, lenp=lenp@entry=0x65cbf0,
    data=0x80061006 "", datalen=246, compat=0, pin=0x0) at /usr/src/debug/openssh-8.8p1-2/ssh-sk.c:626
626     {
(gdb) s
634             debug_f("provider \"%s\", key %s, flags 0x%02x%s",
(gdb) n
debug1: sshsk_sign: provider "internal", key ECDSA-SK, flags 0x01
638             if (sigp != NULL)
(gdb) n
639                     *sigp = NULL;
(gdb) n
640             if (lenp != NULL)
(gdb)
641                     *lenp = 0;
(gdb)
642             type = sshkey_type_plain(key->type);
(gdb)
643             switch (type) {
(gdb)
655             if (provider_path == NULL ||
(gdb)
661             if ((skp = sshsk_open(provider_path)) == NULL) {
(gdb)
671             if ((r = skp->sk_sign(alg, data, datalen, key->sk_application,
(gdb)


Thread 1 "ssh-sk-helper" hit Breakpoint 1, fido_winhello_get_assert (dev=dev@entry=0x80061950, assert=assert@entry=0x80081e50, pin=pin@entry=0x0, ms=-1)
    at /usr/src/debug/libfido2-1.9.0-2/src/winhello.c:822
822     {
(gdb)
829             fido_assert_reset_rx(assert);
(gdb)
831             if ((ctx = calloc(1, sizeof(*ctx))) == NULL) {
(gdb)
835             if ((w = GetForegroundWindow()) == NULL) {
(gdb)
839             if ((r = translate_fido_assert(ctx, assert, pin, ms)) != FIDO_OK) {
(gdb)

Thread 1 "ssh-sk-helper" hit Breakpoint 2, winhello_get_assert (ctx=0x800821a0, w=0x7011e) at /usr/src/debug/libfido2-1.9.0-2/src/winhello.c:683
683             if ((hr = webauthn_get_assert(w, ctx->rp_id, &ctx->cd, &ctx->opt,
(gdb) bt
#0  winhello_get_assert (ctx=0x800821a0, w=0x7011e) at /usr/src/debug/libfido2-1.9.0-2/src/winhello.c:683
#1  fido_winhello_get_assert (dev=dev@entry=0x80061950, assert=assert@entry=0x80081e50, pin=pin@entry=0x0, ms=-1) at /usr/src/debug/libfido2-1.9.0-2/src/winhello.c:843
#2  0x637f2e9c in fido_dev_get_assert (dev=0x80061950, assert=0x80081e50, pin=pin@entry=0x0) at /usr/src/debug/libfido2-1.9.0-2/src/assert.c:294
#3  0x00404d94 in ssh_sk_sign (alg=alg@entry=0, data=data@entry=0x80061006 "", datalen=datalen@entry=246, application=0x80081a30 "ssh:",
    key_handle=0x80061208 "\266\061\303\"\367\310\002%\370!\372\177\213\363Iz\210\262ǵ\253\222\371\032\233\271\313*\306\326Fy\212ZJ\333h\370.\371\371\025\325\034\325\317m?E\266/P\263\376\367\265\b\b%\322\023\215\265dϊB;\377$\\\220O\330bWS\362\026\201\265\266Y\350}H$ޭ\315آؚ", <incomplete sequence \351>, key_handle_len=key_handle_len@entry=96,
    flags=flags@entry=1 '\001', pin=pin@entry=0x0, options=options@entry=0x0, sign_response=sign_response@entry=0x65cb58) at /usr/src/debug/openssh-8.8p1-2/sk-usbhid.c:1093
#4  0x004028c6 in sshsk_sign (provider_path=0x80038cf8 "internal", key=0x80038df0, sigp=sigp@entry=0x65cbe8, lenp=lenp@entry=0x65cbf0, data=0x80061006 "", datalen=246,
    compat=0, pin=0x0) at /usr/src/debug/openssh-8.8p1-2/ssh-sk.c:671
#5  0x00426fc7 in process_sign (req=0x80038c98) at /usr/src/debug/openssh-8.8p1-2/ssh-sk-helper.c:127
#6  main (argc=2, argv=0x65cc3c) at /usr/src/debug/openssh-8.8p1-2/ssh-sk-helper.c:337
(gdb) n
[New Thread 8648.0x1b7c]
[New Thread 8648.0x5b0]

Thread 1 "ssh-sk-helper" hit Breakpoint 4, winhello_assert_free (ctx=0x800821a0) at /usr/src/debug/libfido2-1.9.0-2/src/winhello.c:714
714             if (ctx->assert != NULL)
(gdb) bt
#0  winhello_assert_free (ctx=0x800821a0) at /usr/src/debug/libfido2-1.9.0-2/src/winhello.c:714
#1  fido_winhello_get_assert (dev=0x80061208, assert=0x0, pin=0x8 <error: Cannot access memory at address 0x8>, ms=1) at /usr/src/debug/libfido2-1.9.0-2/src/winhello.c:853
#2  0x00000060 in ?? ()
#3  0x80061208 in ?? ()
Backtrace stopped: Cannot access memory at address 0x3
(gdb)