diff --git a/block/qcow2-refcount.c b/block/qcow2-refcount.c
index 6a95aa6c92..bc1784c30e 100644
--- a/block/qcow2-refcount.c
+++ b/block/qcow2-refcount.c
@@ -737,11 +737,7 @@ int qcow2_update_snapshot_refcount(BlockDriverState *bs,
      * l1_table_offset when it is the current s->l1_table_offset! Be careful
      * when changing this! */
     if (l1_table_offset != s->l1_table_offset) {
-        if (l1_size2 != 0) {
-            l1_table = g_malloc0(align_offset(l1_size2, 512));
-        } else {
-            l1_table = NULL;
-        }
+        l1_table = g_malloc0(align_offset(l1_size2, 512));
         l1_allocated = 1;
         if (bdrv_pread(bs->file, l1_table_offset,
                        l1_table, l1_size2) != l1_size2)
diff --git a/block/vdi.c b/block/vdi.c
index 257a592ea9..87c691b504 100644
--- a/block/vdi.c
+++ b/block/vdi.c
@@ -443,9 +443,7 @@ static int vdi_open(BlockDriverState *bs, int flags)
 
     bmap_size = header.blocks_in_image * sizeof(uint32_t);
     bmap_size = (bmap_size + SECTOR_SIZE - 1) / SECTOR_SIZE;
-    if (bmap_size > 0) {
-        s->bmap = g_malloc(bmap_size * SECTOR_SIZE);
-    }
+    s->bmap = g_malloc(bmap_size * SECTOR_SIZE);
     ret = bdrv_read(bs->file, s->bmap_sector, (uint8_t *)s->bmap, bmap_size);
     if (ret < 0) {
         goto fail_free_bmap;
diff --git a/fsdev/virtfs-proxy-helper.c b/fsdev/virtfs-proxy-helper.c
index 6b9afd32d5..36f66163b2 100644
--- a/fsdev/virtfs-proxy-helper.c
+++ b/fsdev/virtfs-proxy-helper.c
@@ -1039,7 +1039,7 @@ int main(int argc, char **argv)
         }
         switch (c) {
         case 'p':
-            rpath = strdup(optarg);
+            rpath = g_strdup(optarg);
             break;
         case 'n':
             is_daemon = false;
@@ -1048,7 +1048,7 @@ int main(int argc, char **argv)
             sock = atoi(optarg);
             break;
         case 's':
-            sock_name = strdup(optarg);
+            sock_name = g_strdup(optarg);
             break;
         case 'u':
             own_u = atoi(optarg);
diff --git a/hw/9pfs/virtio-9p-device.c b/hw/9pfs/virtio-9p-device.c
index 6f427dfc5d..74155fb61e 100644
--- a/hw/9pfs/virtio-9p-device.c
+++ b/hw/9pfs/virtio-9p-device.c
@@ -85,11 +85,7 @@ VirtIODevice *virtio_9p_init(DeviceState *dev, V9fsConf *conf)
     }
 
     s->ctx.export_flags = fse->export_flags;
-    if (fse->path) {
-        s->ctx.fs_root = g_strdup(fse->path);
-    } else {
-        s->ctx.fs_root = NULL;
-    }
+    s->ctx.fs_root = g_strdup(fse->path);
     s->ctx.exops.get_st_gen = NULL;
     len = strlen(conf->tag);
     if (len > MAX_TAG_LEN - 1) {
@@ -98,7 +94,7 @@ VirtIODevice *virtio_9p_init(DeviceState *dev, V9fsConf *conf)
         exit(1);
     }
 
-    s->tag = strdup(conf->tag);
+    s->tag = g_strdup(conf->tag);
     s->ctx.uid = -1;
 
     s->ops = fse->ops;
diff --git a/hw/9pfs/virtio-9p-local.c b/hw/9pfs/virtio-9p-local.c
index 113602144c..f1b1c83a22 100644
--- a/hw/9pfs/virtio-9p-local.c
+++ b/hw/9pfs/virtio-9p-local.c
@@ -46,7 +46,7 @@ static const char *local_mapped_attr_path(FsContext *ctx,
                                           const char *path, char *buffer)
 {
     char *dir_name;
-    char *tmp_path = strdup(path);
+    char *tmp_path = g_strdup(path);
     char *base_name = basename(tmp_path);
 
     /* NULL terminate the directory */
@@ -55,7 +55,7 @@ static const char *local_mapped_attr_path(FsContext *ctx,
 
     snprintf(buffer, PATH_MAX, "%s/%s/%s/%s",
              ctx->fs_root, dir_name, VIRTFS_META_DIR, base_name);
-    free(tmp_path);
+    g_free(tmp_path);
     return buffer;
 }
 
@@ -130,7 +130,7 @@ static int local_create_mapped_attr_dir(FsContext *ctx, const char *path)
 {
     int err;
     char attr_dir[PATH_MAX];
-    char *tmp_path = strdup(path);
+    char *tmp_path = g_strdup(path);
 
     snprintf(attr_dir, PATH_MAX, "%s/%s/%s",
              ctx->fs_root, dirname(tmp_path), VIRTFS_META_DIR);
@@ -139,7 +139,7 @@ static int local_create_mapped_attr_dir(FsContext *ctx, const char *path)
     if (err < 0 && errno == EEXIST) {
         err = 0;
     }
-    free(tmp_path);
+    g_free(tmp_path);
     return err;
 }
 
diff --git a/hw/9pfs/virtio-9p.c b/hw/9pfs/virtio-9p.c
index 0aaf0d2de0..b795839620 100644
--- a/hw/9pfs/virtio-9p.c
+++ b/hw/9pfs/virtio-9p.c
@@ -3101,11 +3101,7 @@ static void v9fs_xattrcreate(void *opaque)
     xattr_fidp->fs.xattr.flags = flags;
     v9fs_string_init(&xattr_fidp->fs.xattr.name);
     v9fs_string_copy(&xattr_fidp->fs.xattr.name, &name);
-    if (size) {
-        xattr_fidp->fs.xattr.value = g_malloc(size);
-    } else {
-        xattr_fidp->fs.xattr.value = NULL;
-    }
+    xattr_fidp->fs.xattr.value = g_malloc(size);
     err = offset;
     put_fid(pdu, file_fidp);
 out_nofid:
diff --git a/hw/block-common.c b/hw/block-common.c
index 0f1b64ec95..d21ec3ada1 100644
--- a/hw/block-common.c
+++ b/hw/block-common.c
@@ -18,9 +18,7 @@ void blkconf_serial(BlockConf *conf, char **serial)
     if (!*serial) {
         /* try to fall back to value set with legacy -drive serial=... */
         dinfo = drive_get_by_blockdev(conf->bs);
-        if (dinfo->serial) {
-            *serial = g_strdup(dinfo->serial);
-        }
+        *serial = g_strdup(dinfo->serial);
     }
 }
 
diff --git a/hw/cadence_gem.c b/hw/cadence_gem.c
index 0d834422df..b77423d449 100644
--- a/hw/cadence_gem.c
+++ b/hw/cadence_gem.c
@@ -687,14 +687,15 @@ static ssize_t gem_receive(NetClientState *nc, const uint8_t *buf, size_t size)
 
     packet_desc_addr = s->rx_desc_addr;
     while (1) {
-        DB_PRINT("read descriptor 0x%x\n", packet_desc_addr);
+        DB_PRINT("read descriptor 0x%x\n", (unsigned)packet_desc_addr);
         /* read current descriptor */
         cpu_physical_memory_read(packet_desc_addr,
                                  (uint8_t *)&desc[0], sizeof(desc));
 
         /* Descriptor owned by software ? */
         if (rx_desc_get_ownership(desc) == 1) {
-            DB_PRINT("descriptor 0x%x owned by sw.\n", packet_desc_addr);
+            DB_PRINT("descriptor 0x%x owned by sw.\n",
+                     (unsigned)packet_desc_addr);
             s->regs[GEM_RXSTATUS] |= GEM_RXSTATUS_NOBUF;
             /* Handle interrupt consequences */
             gem_update_int_status(s);
@@ -709,7 +710,7 @@ static ssize_t gem_receive(NetClientState *nc, const uint8_t *buf, size_t size)
          */
         if (rx_desc_get_buffer(desc) == 0) {
             DB_PRINT("Invalid RX buffer (NULL) for descriptor 0x%x\n",
-                       packet_desc_addr);
+                     (unsigned)packet_desc_addr);
             break;
         }
 
@@ -749,7 +750,7 @@ static ssize_t gem_receive(NetClientState *nc, const uint8_t *buf, size_t size)
         s->rx_desc_addr += 8;
     }
 
-    DB_PRINT("set SOF, OWN on descriptor 0x%08x\n", packet_desc_addr);
+    DB_PRINT("set SOF, OWN on descriptor 0x%08x\n", (unsigned)packet_desc_addr);
 
     /* Count it */
     gem_receive_updatestats(s, buf, size);
@@ -861,7 +862,8 @@ static void gem_transmit(GemState *s)
          */
         if ((tx_desc_get_buffer(desc) == 0) ||
             (tx_desc_get_length(desc) == 0)) {
-            DB_PRINT("Invalid TX descriptor @ 0x%x\n", packet_desc_addr);
+            DB_PRINT("Invalid TX descriptor @ 0x%x\n",
+                     (unsigned)packet_desc_addr);
             break;
         }
 
@@ -1031,10 +1033,11 @@ static uint64_t gem_read(void *opaque, hwaddr offset, unsigned size)
     offset >>= 2;
     retval = s->regs[offset];
 
-    DB_PRINT("offset: 0x%04x read: 0x%08x\n", offset*4, retval);
+    DB_PRINT("offset: 0x%04x read: 0x%08x\n", (unsigned)offset*4, retval);
 
     switch (offset) {
     case GEM_ISR:
+        DB_PRINT("lowering irq on ISR read\n");
         qemu_set_irq(s->irq, 0);
         break;
     case GEM_PHYMNTNC:
@@ -1073,7 +1076,7 @@ static void gem_write(void *opaque, hwaddr offset, uint64_t val,
     GemState *s = (GemState *)opaque;
     uint32_t readonly;
 
-    DB_PRINT("offset: 0x%04x write: 0x%08x ", offset, (unsigned)val);
+    DB_PRINT("offset: 0x%04x write: 0x%08x ", (unsigned)offset, (unsigned)val);
     offset >>= 2;
 
     /* Squash bits which are read only in write value */
diff --git a/hw/cadence_ttc.c b/hw/cadence_ttc.c
index 2a8fadd810..67028a3f75 100644
--- a/hw/cadence_ttc.c
+++ b/hw/cadence_ttc.c
@@ -302,7 +302,7 @@ static uint64_t cadence_ttc_read(void *opaque, hwaddr offset,
 {
     uint32_t ret = cadence_ttc_read_imp(opaque, offset);
 
-    DB_PRINT("addr: %08x data: %08x\n", offset, ret);
+    DB_PRINT("addr: %08x data: %08x\n", (unsigned)offset, (unsigned)ret);
     return ret;
 }
 
@@ -311,7 +311,7 @@ static void cadence_ttc_write(void *opaque, hwaddr offset,
 {
     CadenceTimerState *s = cadence_timer_from_addr(opaque, offset);
 
-    DB_PRINT("addr: %08x data %08x\n", offset, (unsigned)value);
+    DB_PRINT("addr: %08x data %08x\n", (unsigned)offset, (unsigned)value);
 
     cadence_timer_sync(s);
 
diff --git a/hw/vhost.c b/hw/vhost.c
index cee8aad4a1..0dd2a9aa40 100644
--- a/hw/vhost.c
+++ b/hw/vhost.c
@@ -269,11 +269,8 @@ static inline void vhost_dev_log_resize(struct vhost_dev* dev, uint64_t size)
     vhost_log_chunk_t *log;
     uint64_t log_base;
     int r, i;
-    if (size) {
-        log = g_malloc0(size * sizeof *log);
-    } else {
-        log = NULL;
-    }
+
+    log = g_malloc0(size * sizeof *log);
     log_base = (uint64_t)(unsigned long)log;
     r = ioctl(dev->control, VHOST_SET_LOG_BASE, &log_base);
     assert(r >= 0);
diff --git a/hw/xilinx_axidma.c b/hw/xilinx_axidma.c
index d0ee566a28..cc51584dfc 100644
--- a/hw/xilinx_axidma.c
+++ b/hw/xilinx_axidma.c
@@ -444,7 +444,7 @@ static void axidma_write(void *opaque, hwaddr addr,
             break;
         default:
             D(qemu_log("%s: ch=%d addr=" TARGET_FMT_plx " v=%x\n",
-                  __func__, sid, addr * 4, value));
+                  __func__, sid, addr * 4, (unsigned)value));
             s->regs[addr] = value;
             break;
     }
diff --git a/include/ui/qemu-pixman.h b/include/ui/qemu-pixman.h
index 016fd87726..b032f529aa 100644
--- a/include/ui/qemu-pixman.h
+++ b/include/ui/qemu-pixman.h
@@ -15,7 +15,7 @@
 #pragma GCC diagnostic error "-Wredundant-decls"
 #endif
 
-#include "console.h"
+#include "qemu/typedefs.h"
 
 /*
  * pixman image formats are defined to be native endian,
diff --git a/include/ui/spice-display.h b/include/ui/spice-display.h
index 8b192e9613..46f9530fe3 100644
--- a/include/ui/spice-display.h
+++ b/include/ui/spice-display.h
@@ -21,6 +21,7 @@
 
 #include "qemu/thread.h"
 #include "ui/qemu-pixman.h"
+#include "ui/console.h"
 #include "sysemu/sysemu.h"
 
 #define NUM_MEMSLOTS 8
diff --git a/libcacard/vcard_emul_nss.c b/libcacard/vcard_emul_nss.c
index 5f565e0b4a..df79476db8 100644
--- a/libcacard/vcard_emul_nss.c
+++ b/libcacard/vcard_emul_nss.c
@@ -454,7 +454,7 @@ vreader_emul_new(PK11SlotInfo *slot, VCardEmulType type, const char *params)
 
     new_reader_emul->slot = PK11_ReferenceSlot(slot);
     new_reader_emul->default_type = type;
-    new_reader_emul->type_params = strdup(params);
+    new_reader_emul->type_params = g_strdup(params);
     new_reader_emul->present = PR_FALSE;
     new_reader_emul->series = 0;
     new_reader_emul->saved_vcard = NULL;
@@ -997,7 +997,7 @@ vcard_emul_init(const VCardEmulOptions *options)
     /* We should control this with options. For now we mirror out any
      * removable hardware slot */
     default_card_type = options->hw_card_type;
-    default_type_params = strdup(options->hw_type_params);
+    default_type_params = g_strdup(options->hw_type_params);
 
     SECMOD_GetReadLock(module_lock);
     for (mlp = module_list; mlp; mlp = mlp->next) {
diff --git a/libcacard/vreader.c b/libcacard/vreader.c
index 313349b656..f3efc270a2 100644
--- a/libcacard/vreader.c
+++ b/libcacard/vreader.c
@@ -49,7 +49,7 @@ vreader_new(const char *name, VReaderEmul *private,
     reader = (VReader *)g_malloc(sizeof(VReader));
     qemu_mutex_init(&reader->lock);
     reader->reference_count = 1;
-    reader->name = name ? strdup(name) : NULL;
+    reader->name = g_strdup(name);
     reader->card = NULL;
     reader->id = (vreader_id_t)-1;
     reader->reader_private = private;
diff --git a/libcacard/vscclient.c b/libcacard/vscclient.c
index 2fce52bed5..9b744f249c 100644
--- a/libcacard/vscclient.c
+++ b/libcacard/vscclient.c
@@ -503,8 +503,8 @@ main(
         command_line_options = vcard_emul_options(emul_args);
     }
 
-    qemu_host = strdup(argv[argc - 2]);
-    qemu_port = strdup(argv[argc - 1]);
+    qemu_host = g_strdup(argv[argc - 2]);
+    qemu_port = g_strdup(argv[argc - 1]);
     sock = connect_to_qemu(qemu_host, qemu_port);
     if (sock == -1) {
         fprintf(stderr, "error opening socket, exiting.\n");
diff --git a/net/net.c b/net/net.c
index cdd9b04989..2f0ab3a121 100644
--- a/net/net.c
+++ b/net/net.c
@@ -566,9 +566,7 @@ static int net_init_nic(const NetClientOptions *opts, const char *name,
         assert(peer);
         nd->netdev = peer;
     }
-    if (name) {
-        nd->name = g_strdup(name);
-    }
+    nd->name = g_strdup(name);
     if (nic->has_model) {
         nd->model = g_strdup(nic->model);
     }
diff --git a/qapi/qmp-registry.c b/qapi/qmp-registry.c
index 70cdbca470..28bbbe849e 100644
--- a/qapi/qmp-registry.c
+++ b/qapi/qmp-registry.c
@@ -92,7 +92,7 @@ char **qmp_get_command_list(void)
     list_head = list = g_malloc0(count * sizeof(char *));
 
     QTAILQ_FOREACH(cmd, &qmp_commands, node) {
-        *list = strdup(cmd->name);
+        *list = g_strdup(cmd->name);
         list++;
     }
 
diff --git a/qemu-log.c b/qemu-log.c
index b655b305ea..30c9ab01bd 100644
--- a/qemu-log.c
+++ b/qemu-log.c
@@ -21,10 +21,12 @@
 #include "qemu/log.h"
 
 #ifdef WIN32
-static const char *logfilename = "qemu.log";
+#define DEFAULT_LOGFILENAME "qemu.log"
 #else
-static const char *logfilename = "/tmp/qemu.log";
+#define DEFAULT_LOGFILENAME "/tmp/qemu.log"
 #endif
+
+static char *logfilename;
 FILE *qemu_logfile;
 int qemu_loglevel;
 static int log_append = 0;
@@ -54,11 +56,13 @@ void qemu_log_mask(int mask, const char *fmt, ...)
 /* enable or disable low levels log */
 void qemu_set_log(int log_flags, bool use_own_buffers)
 {
+    const char *fname = logfilename ?: DEFAULT_LOGFILENAME;
+
     qemu_loglevel = log_flags;
     if (qemu_loglevel && !qemu_logfile) {
-        qemu_logfile = fopen(logfilename, log_append ? "a" : "w");
+        qemu_logfile = fopen(fname, log_append ? "a" : "w");
         if (!qemu_logfile) {
-            perror(logfilename);
+            perror(fname);
             _exit(1);
         }
         /* must avoid mmap() usage of glibc by setting a buffer "by hand" */
@@ -84,7 +88,8 @@ void qemu_set_log(int log_flags, bool use_own_buffers)
 
 void cpu_set_log_filename(const char *filename)
 {
-    logfilename = strdup(filename);
+    g_free(logfilename);
+    logfilename = g_strdup(filename);
     if (qemu_logfile) {
         fclose(qemu_logfile);
         qemu_logfile = NULL;
diff --git a/qga/commands.c b/qga/commands.c
index 7ffb35e4af..528b082fa8 100644
--- a/qga/commands.c
+++ b/qga/commands.c
@@ -61,7 +61,7 @@ struct GuestAgentInfo *qmp_guest_info(Error **err)
 
     while (*cmd_list) {
         cmd_info = g_malloc0(sizeof(GuestAgentCommandInfo));
-        cmd_info->name = strdup(*cmd_list);
+        cmd_info->name = g_strdup(*cmd_list);
         cmd_info->enabled = qmp_command_is_enabled(cmd_info->name);
 
         cmd_info_list = g_malloc0(sizeof(GuestAgentCommandInfoList));
diff --git a/qmp-commands.hx b/qmp-commands.hx
index f58a8411ea..f90efe590c 100644
--- a/qmp-commands.hx
+++ b/qmp-commands.hx
@@ -1659,7 +1659,7 @@ Each json-object contain the following:
          - Possible values: "unknown"
 - "removable": true if the device is removable, false otherwise (json-bool)
 - "locked": true if the device is locked, false otherwise (json-bool)
-- "tray-open": only present if removable, true if the device has a tray,
+- "tray_open": only present if removable, true if the device has a tray,
                and it is open (json-bool)
 - "inserted": only present if the device is inserted, it is a json-object
    containing the following:
diff --git a/readline.c b/readline.c
index a0c9638e4d..d6e04d4796 100644
--- a/readline.c
+++ b/readline.c
@@ -247,14 +247,14 @@ static void readline_hist_add(ReadLineState *rs, const char *cmdline)
     }
     if (idx == READLINE_MAX_CMDS) {
 	/* Need to get one free slot */
-	free(rs->history[0]);
+        g_free(rs->history[0]);
 	memmove(rs->history, &rs->history[1],
 	        (READLINE_MAX_CMDS - 1) * sizeof(char *));
 	rs->history[READLINE_MAX_CMDS - 1] = NULL;
 	idx = READLINE_MAX_CMDS - 1;
     }
     if (new_entry == NULL)
-	new_entry = strdup(cmdline);
+        new_entry = g_strdup(cmdline);
     rs->history[idx] = new_entry;
     rs->hist_entry = -1;
 }
diff --git a/slirp/slirp.c b/slirp/slirp.c
index e93b578832..0e6e232789 100644
--- a/slirp/slirp.c
+++ b/slirp/slirp.c
@@ -225,12 +225,8 @@ Slirp *slirp_init(int restricted, struct in_addr vnetwork,
         pstrcpy(slirp->client_hostname, sizeof(slirp->client_hostname),
                 vhostname);
     }
-    if (tftp_path) {
-        slirp->tftp_prefix = g_strdup(tftp_path);
-    }
-    if (bootfile) {
-        slirp->bootp_filename = g_strdup(bootfile);
-    }
+    slirp->tftp_prefix = g_strdup(tftp_path);
+    slirp->bootp_filename = g_strdup(bootfile);
     slirp->vdhcp_startaddr = vdhcp_start;
     slirp->vnameserver_addr = vnameserver;
 
diff --git a/tests/m48t59-test.c b/tests/m48t59-test.c
index d79f55472d..77d69b330d 100644
--- a/tests/m48t59-test.c
+++ b/tests/m48t59-test.c
@@ -142,7 +142,9 @@ static void cmos_get_date_time(struct tm *date)
     date->tm_mday = mday;
     date->tm_mon = mon - 1;
     date->tm_year = base_year + year - 1900;
+#ifndef __sun__
     date->tm_gmtoff = 0;
+#endif
 
     ts = mktime(date);
 }
diff --git a/tests/rtc-test.c b/tests/rtc-test.c
index e7123cafbc..203c0fc363 100644
--- a/tests/rtc-test.c
+++ b/tests/rtc-test.c
@@ -115,7 +115,9 @@ static void cmos_get_date_time(struct tm *date)
     date->tm_mday = mday;
     date->tm_mon = mon - 1;
     date->tm_year = base_year + year - 1900;
+#ifndef __sun__
     date->tm_gmtoff = 0;
+#endif
 
     ts = mktime(date);
 }
diff --git a/ui/qemu-pixman.c b/ui/qemu-pixman.c
index 609335ab11..6dcbe90546 100644
--- a/ui/qemu-pixman.c
+++ b/ui/qemu-pixman.c
@@ -3,7 +3,8 @@
  * See the COPYING file in the top-level directory.
  */
 
-#include "ui/qemu-pixman.h"
+#include "qemu-common.h"
+#include "ui/console.h"
 
 int qemu_pixman_get_type(int rshift, int gshift, int bshift)
 {
diff --git a/ui/spice-core.c b/ui/spice-core.c
index 3f2c5650cd..bcc4199e7a 100644
--- a/ui/spice-core.c
+++ b/ui/spice-core.c
@@ -848,8 +848,8 @@ static int qemu_spice_set_ticket(bool fail_if_conn, bool disconnect_if_conn)
 int qemu_spice_set_passwd(const char *passwd,
                           bool fail_if_conn, bool disconnect_if_conn)
 {
-    free(auth_passwd);
-    auth_passwd = strdup(passwd);
+    g_free(auth_passwd);
+    auth_passwd = g_strdup(passwd);
     return qemu_spice_set_ticket(fail_if_conn, disconnect_if_conn);
 }
 
diff --git a/ui/vnc-ws.c b/ui/vnc-ws.c
index 9ccdc1971c..3e3020916c 100644
--- a/ui/vnc-ws.c
+++ b/ui/vnc-ws.c
@@ -120,10 +120,11 @@ static char *vncws_extract_handshake_entry(const char *handshake,
 static void vncws_send_handshake_response(VncState *vs, const char* key)
 {
     char combined_key[WS_CLIENT_KEY_LEN + WS_GUID_LEN + 1];
-    char hash[SHA1_DIGEST_LEN];
-    size_t hash_size = SHA1_DIGEST_LEN;
+    unsigned char hash[SHA1_DIGEST_LEN];
+    size_t hash_size = sizeof(hash);
     char *accept = NULL, *response = NULL;
     gnutls_datum_t in;
+    int ret;
 
     g_strlcpy(combined_key, key, WS_CLIENT_KEY_LEN + 1);
     g_strlcat(combined_key, WS_GUID, WS_CLIENT_KEY_LEN + WS_GUID_LEN + 1);
@@ -131,9 +132,9 @@ static void vncws_send_handshake_response(VncState *vs, const char* key)
     /* hash and encode it */
     in.data = (void *)combined_key;
     in.size = WS_CLIENT_KEY_LEN + WS_GUID_LEN;
-    if (gnutls_fingerprint(GNUTLS_DIG_SHA1, &in, hash, &hash_size)
-            == GNUTLS_E_SUCCESS) {
-        accept = g_base64_encode((guchar *)hash, SHA1_DIGEST_LEN);
+    ret = gnutls_fingerprint(GNUTLS_DIG_SHA1, &in, hash, &hash_size);
+    if (ret == GNUTLS_E_SUCCESS && hash_size <= SHA1_DIGEST_LEN) {
+        accept = g_base64_encode(hash, hash_size);
     }
     if (accept == NULL) {
         VNC_DEBUG("Hashing Websocket combined key failed\n");
diff --git a/util/qemu-option.c b/util/qemu-option.c
index f532b765a0..c12e7245ef 100644
--- a/util/qemu-option.c
+++ b/util/qemu-option.c
@@ -643,9 +643,7 @@ static void opt_set(QemuOpts *opts, const char *name, const char *value,
         QTAILQ_INSERT_TAIL(&opts->head, opt, next);
     }
     opt->desc = desc;
-    if (value) {
-        opt->str = g_strdup(value);
-    }
+    opt->str = g_strdup(value);
     qemu_opt_parse(opt, &local_err);
     if (error_is_set(&local_err)) {
         error_propagate(errp, local_err);
@@ -792,9 +790,7 @@ QemuOpts *qemu_opts_create(QemuOptsList *list, const char *id,
         }
     }
     opts = g_malloc0(sizeof(*opts));
-    if (id) {
-        opts->id = g_strdup(id);
-    }
+    opts->id = g_strdup(id);
     opts->list = list;
     loc_save(&opts->loc);
     QTAILQ_INIT(&opts->head);