Commit 0b20406c authored Sep 27, 2010 by Sven Eckelmann Committed by David S. Miller Sep 27, 2010

net/9p: Mount only matching virtio channels



p9_virtio_create will only compare the the channel's tag characters
against the device name till the end of the channel's tag but not till
the end of the device name. This means that if a user defines channels
with the tags foo and foobar then he would mount foo when he requested
foonot and may mount foo when he requested foobar.

Thus it is necessary to check both string lengths against each other in
case of a successful partial string match.

Signed-off-by: Sven Eckelmann <sven.eckelmann@gmx.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 387a8562

net/9p/trans_virtio.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -329,7 +329,8 @@ p9_virtio_create(struct p9_client client, const char devname, char *args)

		mutex_lock(&virtio_9p_lock);
		list_for_each_entry(chan, &virtio_chan_list, chan_list) {
		if (!strncmp(devname, chan->tag, chan->tag_len)) {
		if (!strncmp(devname, chan->tag, chan->tag_len) &&
		strlen(devname) == chan->tag_len) {
		if (!chan->inuse) {
		chan->inuse = true;
		found = 1;

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