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Re: [PATCH v3 10/22] target/i386/sev: sev_get_attestation_report use g_a


From: Paolo Bonzini
Subject: Re: [PATCH v3 10/22] target/i386/sev: sev_get_attestation_report use g_autofree
Date: Mon, 4 Oct 2021 10:13:02 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.1.0

On 02/10/21 14:53, Philippe Mathieu-Daudé wrote:
From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>

Removes a whole bunch of g_free's and a goto.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Connor Kuehl <ckuehl@redhat.com>
Reviewed-by: Brijesh Singh <brijesh.singh@amd.com>
Message-Id: <20210603113017.34922-1-dgilbert@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
  target/i386/sev.c | 11 +++--------
  1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/target/i386/sev.c b/target/i386/sev.c
index c88cd808410..aefbef4bb63 100644
--- a/target/i386/sev.c
+++ b/target/i386/sev.c
@@ -493,8 +493,8 @@ sev_get_attestation_report(const char *mnonce, Error **errp)
      struct kvm_sev_attestation_report input = {};
      SevAttestationReport *report = NULL;
      SevGuestState *sev = sev_guest;
-    guchar *data;
-    guchar *buf;
+    g_autofree guchar *data = NULL;
+    g_autofree guchar *buf = NULL;
      gsize len;
      int err = 0, ret;
@@ -514,7 +514,6 @@ sev_get_attestation_report(const char *mnonce, Error **errp)
      if (len != sizeof(input.mnonce)) {
          error_setg(errp, "SEV: mnonce must be %zu bytes (got %" G_GSIZE_FORMAT 
")",
                  sizeof(input.mnonce), len);
-        g_free(buf);
          return NULL;
      }
@@ -525,7 +524,6 @@ sev_get_attestation_report(const char *mnonce, Error **errp)
          if (err != SEV_RET_INVALID_LEN) {
              error_setg(errp, "failed to query the attestation report length "
                      "ret=%d fw_err=%d (%s)", ret, err, fw_error_to_str(err));
-            g_free(buf);
              return NULL;
          }
      }
@@ -540,7 +538,7 @@ sev_get_attestation_report(const char *mnonce, Error **errp)
      if (ret) {
          error_setg_errno(errp, errno, "Failed to get attestation report"
                  " ret=%d fw_err=%d (%s)", ret, err, fw_error_to_str(err));
-        goto e_free_data;
+        return NULL;
      }
report = g_new0(SevAttestationReport, 1);
@@ -548,9 +546,6 @@ sev_get_attestation_report(const char *mnonce, Error **errp)
trace_kvm_sev_attestation_report(mnonce, report->data); -e_free_data:
-    g_free(data);
-    g_free(buf);
      return report;
  }

Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>




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