From: "Daniel P. Berrange" <berra...@redhat.com>
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 <berra...@redhat.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.ku...@linux.vnet.ibm.com>
---
hw/9pfs/virtio-9p-device.c | 4 +++-
1 files changed, 3 insertions(+), 1 deletions(-)
diff --git a/hw/9pfs/virtio-9p-device.c b/hw/9pfs/virtio-9p-device.c
index b23e8a4..0930d22 100644
--- a/hw/9pfs/virtio-9p-device.c
+++ b/hw/9pfs/virtio-9p-device.c
@@ -119,7 +119,9 @@ VirtIODevice *virtio_9p_init(DeviceState *dev, V9fsConf
*conf)
s->ctx.fs_root = g_strdup(fse->path);
len = strlen(conf->tag);
if (len > MAX_TAG_LEN) {
- len = MAX_TAG_LEN;
+ fprintf(stderr, "mount tag '%s' (%d bytes) is longer than "
+ "maximum (%d bytes)", conf->tag, len, MAX_TAG_LEN);
+ exit(1);
}
/* s->tag is non-NULL terminated string */
s->tag = g_malloc(len);
--
1.7.5.4
