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qemu: Use dynamic buffer for storing PTY aliases

Browse Source 
https://bugzilla.redhat.com/show_bug.cgi?id=1560976

For historical reasons we've used 32 bytes long static buffer for
storing PTY aliases. This breaks users scenario where they try to
start a machine with user alias consisting of "ua-$uuid".

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
This commit is contained in:
Michal Privoznik 2018-03-29 08:50:01 +02:00
parent 0cd8068425
commit c4c32cb300
1 changed files with 20 additions and 19 deletions
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39
src/qemu/qemu_process.c
View File

@ -1949,21 +1949,18 @@ qemuProcessLookupPTYs(virDomainChrDefPtr *devices,
int count,
virHashTablePtr info)
{
char *id = NULL;
size_t i;
int ret = -1;
for (i = 0; i < count; i++) {
virDomainChrDefPtr chr = devices[i];
if (chr->source->type == VIR_DOMAIN_CHR_TYPE_PTY) {
char id[32];
qemuMonitorChardevInfoPtr entry;
if (snprintf(id, sizeof(id), "char%s",
chr->info.alias) >= sizeof(id)) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("failed to format device alias "
"for PTY retrieval"));
VIR_FREE(id);
if (virAsprintf(&id, "char%s", chr->info.alias) < 0)
return -1;
}
entry = virHashLookup(info, id);
if (!entry || !entry->ptyPath) {
@ -1973,7 +1970,7 @@ qemuProcessLookupPTYs(virDomainChrDefPtr *devices,
*/
virReportError(VIR_ERR_INTERNAL_ERROR,
_("no assigned pty for device %s"), id);
return -1;
goto cleanup;
} else {
/* 'info chardev' had no pty path for this chardev,
* but the log output had, so we're fine
@ -1984,11 +1981,14 @@ qemuProcessLookupPTYs(virDomainChrDefPtr *devices,
VIR_FREE(chr->source->data.file.path);
if (VIR_STRDUP(chr->source->data.file.path, entry->ptyPath) < 0)
return -1;
goto cleanup;
}
}
return 0;
ret = 0;
cleanup:
VIR_FREE(id);
return ret;
}
static int
@ -2040,7 +2040,8 @@ qemuProcessRefreshChannelVirtioState(virQEMUDriverPtr driver,
int agentReason = VIR_CONNECT_DOMAIN_EVENT_AGENT_LIFECYCLE_REASON_CHANNEL;
qemuMonitorChardevInfoPtr entry;
virObjectEventPtr event = NULL;
char id[32];
char *id = NULL;
int ret = -1;
if (booted)
agentReason = VIR_CONNECT_DOMAIN_EVENT_AGENT_LIFECYCLE_REASON_DOMAIN_STARTED;
@ -2048,13 +2049,10 @@ qemuProcessRefreshChannelVirtioState(virQEMUDriverPtr driver,
for (i = 0; i < vm->def->nchannels; i++) {
virDomainChrDefPtr chr = vm->def->channels[i];
if (chr->targetType == VIR_DOMAIN_CHR_CHANNEL_TARGET_TYPE_VIRTIO) {
if (snprintf(id, sizeof(id), "char%s",
chr->info.alias) >= sizeof(id)) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("failed to format device alias "
"for PTY retrieval"));
return -1;
}
VIR_FREE(id);
if (virAsprintf(&id, "char%s", chr->info.alias) < 0)
goto cleanup;
/* port state not reported */
if (!(entry = virHashLookup(info, id)) ||
@ -2071,7 +2069,10 @@ qemuProcessRefreshChannelVirtioState(virQEMUDriverPtr driver,
}
}
return 0;
ret = 0;
cleanup:
VIR_FREE(id);
return ret;
}