hw/9pfs: Ensure an error is reported to user if 9pfs mount tag is too long
If the 9pfs mount tag is longer than MAX_TAG_LEN bytes, rather than silently truncating the tag which will likely break the guest OS, report an immediate error and exit QEMU * hw/9pfs/virtio-9p-device.c: Report error & exit if mount tag is too long Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
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@ -119,7 +119,9 @@ VirtIODevice *virtio_9p_init(DeviceState *dev, V9fsConf *conf)
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s->ctx.fs_root = g_strdup(fse->path);
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len = strlen(conf->tag);
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if (len > MAX_TAG_LEN) {
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len = MAX_TAG_LEN;
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fprintf(stderr, "mount tag '%s' (%d bytes) is longer than "
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"maximum (%d bytes)", conf->tag, len, MAX_TAG_LEN);
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exit(1);
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}
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/* s->tag is non-NULL terminated string */
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s->tag = g_malloc(len);
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