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From fd11d55c30553c37d3d71d202348ac22029cba8d Mon Sep 17 00:00:00 2001
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Message-Id: <fd11d55c30553c37d3d71d202348ac22029cba8d@dist-git>
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From: Michal Privoznik <mprivozn@redhat.com>
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Date: Fri, 13 Apr 2018 10:09:29 +0200
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Subject: [PATCH] qemu: Use dynamic buffer for storing PTY aliases
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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RHEL-7.6: https://bugzilla.redhat.com/show_bug.cgi?id=1560976
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RHEL-7.5.z: https://bugzilla.redhat.com/show_bug.cgi?id=1566525
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For historical reasons we've used 32 bytes long static buffer for
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storing PTY aliases. This breaks users scenario where they try to
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start a machine with user alias consisting of "ua-$uuid".
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Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
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(cherry picked from commit c4c32cb300beba41ecbca3ee4884c65630bde861)
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Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
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Reviewed-by: Ján Tomko <jtomko@redhat.com>
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Reviewed-by: Erik Skultety <eskultet@redhat.com>
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---
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src/qemu/qemu_process.c | 39 ++++++++++++++++++++-------------------
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1 file changed, 20 insertions(+), 19 deletions(-)
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diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c
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index c86f7d3c5b..04147f381e 100644
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--- a/src/qemu/qemu_process.c
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+++ b/src/qemu/qemu_process.c
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@@ -1931,21 +1931,18 @@ qemuProcessLookupPTYs(virDomainChrDefPtr *devices,
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int count,
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virHashTablePtr info)
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{
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+ char *id = NULL;
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size_t i;
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+ int ret = -1;
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for (i = 0; i < count; i++) {
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virDomainChrDefPtr chr = devices[i];
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if (chr->source->type == VIR_DOMAIN_CHR_TYPE_PTY) {
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- char id[32];
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qemuMonitorChardevInfoPtr entry;
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- if (snprintf(id, sizeof(id), "char%s",
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- chr->info.alias) >= sizeof(id)) {
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- virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
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- _("failed to format device alias "
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- "for PTY retrieval"));
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+ VIR_FREE(id);
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+ if (virAsprintf(&id, "char%s", chr->info.alias) < 0)
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return -1;
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- }
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entry = virHashLookup(info, id);
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if (!entry || !entry->ptyPath) {
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@@ -1955,7 +1952,7 @@ qemuProcessLookupPTYs(virDomainChrDefPtr *devices,
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*/
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virReportError(VIR_ERR_INTERNAL_ERROR,
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_("no assigned pty for device %s"), id);
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- return -1;
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+ goto cleanup;
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} else {
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/* 'info chardev' had no pty path for this chardev,
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* but the log output had, so we're fine
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@@ -1966,11 +1963,14 @@ qemuProcessLookupPTYs(virDomainChrDefPtr *devices,
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VIR_FREE(chr->source->data.file.path);
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if (VIR_STRDUP(chr->source->data.file.path, entry->ptyPath) < 0)
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- return -1;
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+ goto cleanup;
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}
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}
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- return 0;
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+ ret = 0;
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+ cleanup:
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+ VIR_FREE(id);
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+ return ret;
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}
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static int
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@@ -2022,7 +2022,8 @@ qemuProcessRefreshChannelVirtioState(virQEMUDriverPtr driver,
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int agentReason = VIR_CONNECT_DOMAIN_EVENT_AGENT_LIFECYCLE_REASON_CHANNEL;
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qemuMonitorChardevInfoPtr entry;
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virObjectEventPtr event = NULL;
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- char id[32];
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+ char *id = NULL;
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+ int ret = -1;
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if (booted)
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agentReason = VIR_CONNECT_DOMAIN_EVENT_AGENT_LIFECYCLE_REASON_DOMAIN_STARTED;
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@@ -2030,13 +2031,10 @@ qemuProcessRefreshChannelVirtioState(virQEMUDriverPtr driver,
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for (i = 0; i < vm->def->nchannels; i++) {
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virDomainChrDefPtr chr = vm->def->channels[i];
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if (chr->targetType == VIR_DOMAIN_CHR_CHANNEL_TARGET_TYPE_VIRTIO) {
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- if (snprintf(id, sizeof(id), "char%s",
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- chr->info.alias) >= sizeof(id)) {
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- virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
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- _("failed to format device alias "
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- "for PTY retrieval"));
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- return -1;
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- }
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+
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+ VIR_FREE(id);
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+ if (virAsprintf(&id, "char%s", chr->info.alias) < 0)
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+ goto cleanup;
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/* port state not reported */
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if (!(entry = virHashLookup(info, id)) ||
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@@ -2053,7 +2051,10 @@ qemuProcessRefreshChannelVirtioState(virQEMUDriverPtr driver,
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}
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}
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- return 0;
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+ ret = 0;
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+ cleanup:
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+ VIR_FREE(id);
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+ return ret;
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}
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--
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2.17.0
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