From: Daniel P. Berrange <berrange@redhat.com>
Date: Fri, 14 Jul 2017 10:31:05 +0000 (+0100)
Subject: qcow: fix memory leaks related to encryption
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=0696ae2c9236a3589f5eaf5b00c12868b6f30a17;p=qemu.git

qcow: fix memory leaks related to encryption

Fix leak of the 'encryptopts' string, which was mistakenly
declared const.

Fix leak of QemuOpts entry which should not have been deleted
from the opts array.

Reported by: coverity
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Message-id: 20170714103105.5781-1-berrange@redhat.com
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
---

diff --git a/block/qcow.c b/block/qcow.c
index 66827d6f24..c08cdc4a7b 100644
--- a/block/qcow.c
+++ b/block/qcow.c
@@ -768,7 +768,7 @@ static int qcow_create(const char *filename, QemuOpts *opts, Error **errp)
     Error *local_err = NULL;
     int ret;
     BlockBackend *qcow_blk;
-    const char *encryptfmt = NULL;
+    char *encryptfmt = NULL;
     QDict *options;
     QDict *encryptopts = NULL;
     QCryptoBlockCreateOptions *crypto_opts = NULL;
@@ -793,7 +793,7 @@ static int qcow_create(const char *filename, QemuOpts *opts, Error **errp)
             goto cleanup;
         }
     } else if (qemu_opt_get_bool_del(opts, BLOCK_OPT_ENCRYPT, false)) {
-        encryptfmt = "aes";
+        encryptfmt = g_strdup("aes");
     }
 
     ret = bdrv_create_file(filename, opts, &local_err);
@@ -908,6 +908,7 @@ exit:
     blk_unref(qcow_blk);
 cleanup:
     QDECREF(encryptopts);
+    g_free(encryptfmt);
     qcrypto_block_free(crypto);
     qapi_free_QCryptoBlockCreateOptions(crypto_opts);
     g_free(backing_file);
diff --git a/block/qcow2.c b/block/qcow2.c
index 90efa4477b..d7c600b5a2 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -2905,7 +2905,7 @@ static int qcow2_create(const char *filename, QemuOpts *opts, Error **errp)
     int version;
     uint64_t refcount_bits;
     int refcount_order;
-    const char *encryptfmt = NULL;
+    char *encryptfmt = NULL;
     Error *local_err = NULL;
     int ret;
 
@@ -2916,14 +2916,14 @@ static int qcow2_create(const char *filename, QemuOpts *opts, Error **errp)
     backing_fmt = qemu_opt_get_del(opts, BLOCK_OPT_BACKING_FMT);
     encryptfmt = qemu_opt_get_del(opts, BLOCK_OPT_ENCRYPT_FORMAT);
     if (encryptfmt) {
-        if (qemu_opt_get_del(opts, BLOCK_OPT_ENCRYPT)) {
+        if (qemu_opt_get(opts, BLOCK_OPT_ENCRYPT)) {
             error_setg(errp, "Options " BLOCK_OPT_ENCRYPT " and "
                        BLOCK_OPT_ENCRYPT_FORMAT " are mutually exclusive");
             ret = -EINVAL;
             goto finish;
         }
     } else if (qemu_opt_get_bool_del(opts, BLOCK_OPT_ENCRYPT, false)) {
-        encryptfmt = "aes";
+        encryptfmt = g_strdup("aes");
     }
     cluster_size = qcow2_opt_get_cluster_size_del(opts, &local_err);
     if (local_err) {
@@ -2983,6 +2983,7 @@ static int qcow2_create(const char *filename, QemuOpts *opts, Error **errp)
 finish:
     g_free(backing_file);
     g_free(backing_fmt);
+    g_free(encryptfmt);
     g_free(buf);
     return ret;
 }