diff options
| author | Martin Kletzander <mkletzan@redhat.com> | 2014-04-01 14:58:56 +0200 |
|---|---|---|
| committer | Martin Kletzander <mkletzan@redhat.com> | 2014-04-09 18:10:39 +0200 |
| commit | 16ee93cc7ab3a5b2340b47871c553ae9cd9e5d2d (patch) | |
| tree | 8eb4beb72a0c06c115a732901676f0584c9be9ee | |
| parent | 60f3065e0f59831359e4399ba4d23449aab02a8b (diff) | |
| download | libvirt-16ee93cc7ab3a5b2340b47871c553ae9cd9e5d2d.tar.gz | |
qemu: cleanup error checking on agent replies
On all the places where qemuAgentComand() was called, we did a check
for errors in the reply. Unfortunately, some of the places called
qemuAgentCheckError() without checking for non-null reply which might
have resulted in a crash.
So this patch makes the error-checking part of qemuAgentCommand()
itself, which:
a) makes it look better,
b) makes the check mandatory and, most importantly,
c) checks for the errors if and only if it is appropriate.
This actually fixes a potential crashers when qemuAgentComand()
returned 0, but reply was NULL. Having said that, it *should* fix the
following bug:
https://bugzilla.redhat.com/show_bug.cgi?id=1058149
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
(cherry picked from commit 5b3492fadb6bfddd370e263bf8a6953b1b26116f)
Conflicts:
src/qemu/qemu_agent.c -- vCPU functions (3099c063)
| -rw-r--r-- | src/qemu/qemu_agent.c | 21 |
1 files changed, 5 insertions, 16 deletions
diff --git a/src/qemu/qemu_agent.c b/src/qemu/qemu_agent.c index b9738bf1d9..1e03e67351 100644 --- a/src/qemu/qemu_agent.c +++ b/src/qemu/qemu_agent.c @@ -114,6 +114,8 @@ struct _qemuAgent { qemuAgentEvent await_event; }; +static int qemuAgentCheckError(virJSONValuePtr cmd, virJSONValuePtr reply); + static virClassPtr qemuAgentClass; static void qemuAgentDispose(void *obj); @@ -1013,6 +1015,7 @@ qemuAgentCommand(qemuAgentPtr mon, } } else { *reply = msg.rxObject; + ret = qemuAgentCheckError(cmd, *reply); } } @@ -1279,9 +1282,6 @@ int qemuAgentShutdown(qemuAgentPtr mon, ret = qemuAgentCommand(mon, cmd, &reply, VIR_DOMAIN_QEMU_AGENT_COMMAND_BLOCK); - if (reply && ret == 0) - ret = qemuAgentCheckError(cmd, reply); - virJSONValueFree(cmd); virJSONValueFree(reply); return ret; @@ -1310,8 +1310,7 @@ int qemuAgentFSFreeze(qemuAgentPtr mon) return -1; if (qemuAgentCommand(mon, cmd, &reply, - VIR_DOMAIN_QEMU_AGENT_COMMAND_BLOCK) < 0 || - qemuAgentCheckError(cmd, reply) < 0) + VIR_DOMAIN_QEMU_AGENT_COMMAND_BLOCK) < 0) goto cleanup; if (virJSONValueObjectGetNumberInt(reply, "return", &ret) < 0) { @@ -1348,8 +1347,7 @@ int qemuAgentFSThaw(qemuAgentPtr mon) return -1; if (qemuAgentCommand(mon, cmd, &reply, - VIR_DOMAIN_QEMU_AGENT_COMMAND_BLOCK) < 0 || - qemuAgentCheckError(cmd, reply) < 0) + VIR_DOMAIN_QEMU_AGENT_COMMAND_BLOCK) < 0) goto cleanup; if (virJSONValueObjectGetNumberInt(reply, "return", &ret) < 0) { @@ -1388,9 +1386,6 @@ qemuAgentSuspend(qemuAgentPtr mon, ret = qemuAgentCommand(mon, cmd, &reply, VIR_DOMAIN_QEMU_AGENT_COMMAND_BLOCK); - if (reply && ret == 0) - ret = qemuAgentCheckError(cmd, reply); - virJSONValueFree(cmd); virJSONValueFree(reply); return ret; @@ -1421,9 +1416,6 @@ qemuAgentArbitraryCommand(qemuAgentPtr mon, if ((ret = qemuAgentCommand(mon, cmd, &reply, timeout)) < 0) goto cleanup; - if ((ret = qemuAgentCheckError(cmd, reply)) < 0) - goto cleanup; - if (!(*result = virJSONValueToString(reply, false))) ret = -1; @@ -1451,9 +1443,6 @@ qemuAgentFSTrim(qemuAgentPtr mon, ret = qemuAgentCommand(mon, cmd, &reply, VIR_DOMAIN_QEMU_AGENT_COMMAND_BLOCK); - if (reply && ret == 0) - ret = qemuAgentCheckError(cmd, reply); - virJSONValueFree(cmd); virJSONValueFree(reply); return ret; |