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| author | Tomas Bortoli <tomasbortoli@gmail.com> | 2018-07-27 14:05:58 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-09-09 20:55:55 +0300 |
| commit | 390671089d6214542fb8bd8e2f7700647c18017f (patch) | |
| tree | 873756ec52c91ec9184418410b08b361992024ea /net/9p/trans_virtio.c | |
| parent | def89b81ef459e98d3e4adce8de78561c3be14f0 (diff) | |
| download | linux-390671089d6214542fb8bd8e2f7700647c18017f.tar.xz | |
9p: fix multiple NULL-pointer-dereferences
commit 10aa14527f458e9867cf3d2cc6b8cb0f6704448b upstream.
Added checks to prevent GPFs from raising.
Link: http://lkml.kernel.org/r/20180727110558.5479-1-tomasbortoli@gmail.com
Signed-off-by: Tomas Bortoli <tomasbortoli@gmail.com>
Reported-by: syzbot+1a262da37d3bead15c39@syzkaller.appspotmail.com
Cc: stable@vger.kernel.org
Signed-off-by: Dominique Martinet <dominique.martinet@cea.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/9p/trans_virtio.c')
| -rw-r--r-- | net/9p/trans_virtio.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/net/9p/trans_virtio.c b/net/9p/trans_virtio.c index 202c8ef1c0fa..a03336ede2ca 100644 --- a/net/9p/trans_virtio.c +++ b/net/9p/trans_virtio.c @@ -650,6 +650,9 @@ p9_virtio_create(struct p9_client *client, const char *devname, char *args) int ret = -ENOENT; int found = 0; + if (devname == NULL) + return -EINVAL; + mutex_lock(&virtio_9p_lock); list_for_each_entry(chan, &virtio_chan_list, chan_list) { if (!strncmp(devname, chan->tag, chan->tag_len) && |