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| author | Tomas Bortoli <tomasbortoli@gmail.com> | 2018-07-23 17:44:04 +0200 |
|---|---|---|
| committer | Dominique Martinet <dominique.martinet@cea.fr> | 2018-08-13 09:34:58 +0900 |
| commit | f984579a01d85166ee7380204a96d978a67687a1 (patch) | |
| tree | 6921952e63cd2ec0cb11625de49fb4395e0d4ce4 /net/9p/trans_virtio.c | |
| parent | 9f476d7c540cb57556d3cc7e78704e6cd5100f5f (diff) | |
| download | linux-f984579a01d85166ee7380204a96d978a67687a1.tar.gz linux-f984579a01d85166ee7380204a96d978a67687a1.tar.bz2 linux-f984579a01d85166ee7380204a96d978a67687a1.zip | |
9p: validate PDU length
This commit adds length check for the PDU size.
The size contained in the header has to match the actual size,
except for TCP (trans_fd.c) where actual length is not known ahead
and the header's length will be checked only against the validity
range.
Link: http://lkml.kernel.org/r/20180723154404.2406-1-tomasbortoli@gmail.com
Signed-off-by: Tomas Bortoli <tomasbortoli@gmail.com>
Reported-by: syzbot+65c6b72f284a39d416b4@syzkaller.appspotmail.com
To: Eric Van Hensbergen <ericvh@gmail.com>
To: Ron Minnich <rminnich@sandia.gov>
To: Latchesar Ionkov <lucho@ionkov.net>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Dominique Martinet <dominique.martinet@cea.fr>
Diffstat (limited to 'net/9p/trans_virtio.c')
| -rw-r--r-- | net/9p/trans_virtio.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/net/9p/trans_virtio.c b/net/9p/trans_virtio.c index d422bfc81eca..06dcd3cc6a29 100644 --- a/net/9p/trans_virtio.c +++ b/net/9p/trans_virtio.c @@ -156,8 +156,10 @@ static void req_done(struct virtqueue *vq) need_wakeup = true; } - if (len) + if (len) { + req->rc->size = len; p9_client_cb(chan->client, req, REQ_STATUS_RCVD); + } } spin_unlock_irqrestore(&chan->lock, flags); /* Wakeup if anyone waiting for VirtIO ring space. */ |