From: Paolo Bonzini <pbonzini@redhat.com>
Date: Fri, 31 May 2013 12:00:27 +0000 (+0200)
Subject: do not check pointers after dereferencing them
X-Git-Tag: v1.5.1~41
X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=baa8a8b44452f4a51de5ba33089dd8882d3fa545;hp=327e75b537c3b7bc25ac83bedeb4a40c782796c3;p=qemu.git

do not check pointers after dereferencing them

Two instances, both spotted by Coverity.  In one, two blocks were
swapped.  In the other, the check is not needed anymore.

Cc: qemu-stable@nongnu.org
Cc: qemu-trivial@nongnu.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
(cherry picked from commit a4cc73d629d43c8a4d171d043ff229a959df3ca6)

Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
---

diff --git a/monitor.c b/monitor.c
index 62aaebe66..dee980ca5 100644
--- a/monitor.c
+++ b/monitor.c
@@ -281,7 +281,7 @@ void monitor_flush(Monitor *mon)
     buf = qstring_get_str(mon->outbuf);
     len = qstring_get_length(mon->outbuf);
 
-    if (mon && len && !mon->mux_out) {
+    if (len && !mon->mux_out) {
         rc = qemu_chr_fe_write(mon->chr, (const uint8_t *) buf, len);
         if (rc == len) {
             /* all flushed */
diff --git a/savevm.c b/savevm.c
index 31dcce975..4e0fab6cd 100644
--- a/savevm.c
+++ b/savevm.c
@@ -322,13 +322,13 @@ QEMUFile *qemu_popen_cmd(const char *command, const char *mode)
     FILE *stdio_file;
     QEMUFileStdio *s;
 
-    stdio_file = popen(command, mode);
-    if (stdio_file == NULL) {
+    if (mode == NULL || (mode[0] != 'r' && mode[0] != 'w') || mode[1] != 0) {
+        fprintf(stderr, "qemu_popen: Argument validity check failed\n");
         return NULL;
     }
 
-    if (mode == NULL || (mode[0] != 'r' && mode[0] != 'w') || mode[1] != 0) {
-        fprintf(stderr, "qemu_popen: Argument validity check failed\n");
+    stdio_file = popen(command, mode);
+    if (stdio_file == NULL) {
         return NULL;
     }