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gp_creds: fix use-after-free in gp_count_tickets() #133

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Merged
simo5 merged 1 commit into from
Sep 8, 2026
Merged

gp_creds: fix use-after-free in gp_count_tickets() #133

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19 changes: 9 additions & 10 deletions src/gp_creds.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1105,21 +1105,20 @@ uint32_t gp_count_tickets(uint32_t *min, gss_cred_id_t cred, uint32_t *ccsum)
goto done;
}

do {
err = krb5_cc_next_cred(context, ccache, &cursor, &creds);
if (err != 0 && err != KRB5_CC_END) {
ret_min = err;
ret_maj = GSS_S_FAILURE;
goto done;
}

while ((err = krb5_cc_next_cred(context, ccache, &cursor, &creds)) == 0) {
krb5_free_cred_contents(context, &creds);

/* TODO: Should we do a real checksum over all creds->ticket data and
* flags in future ? */
(*ccsum)++;

} while (err == 0);
}
if (err != KRB5_CC_END) {
ret_min = err;
ret_maj = GSS_S_FAILURE;
/* do not leak the cursor when an iteration error occurs */
krb5_cc_end_seq_get(context, ccache, &cursor);
goto done;
}

err = krb5_cc_end_seq_get(context, ccache, &cursor);
if (err != 0) {
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