diff options
| author | Tomas Bortoli <tomasbortoli@gmail.com> | 2018-07-27 13:05:58 +0200 |
|---|---|---|
| committer | Dominique Martinet <dominique.martinet@cea.fr> | 2018-08-13 09:34:58 +0900 |
| commit | 10aa14527f458e9867cf3d2cc6b8cb0f6704448b (patch) | |
| tree | 528cd65953fc42890ac1e51ff452d148133a2734 | |
| parent | 3111784bee81591ea2815011688d28b65df03627 (diff) | |
9p: fix multiple NULL-pointer-dereferences
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>
| -rw-r--r-- | net/9p/trans_fd.c | 5 | ||||
| -rw-r--r-- | net/9p/trans_rdma.c | 3 | ||||
| -rw-r--r-- | net/9p/trans_virtio.c | 3 | ||||
| -rw-r--r-- | net/9p/trans_xen.c | 3 |
4 files changed, 13 insertions, 1 deletions
diff --git a/net/9p/trans_fd.c b/net/9p/trans_fd.c index 964260265b13..e2ef3c782c53 100644 --- a/net/9p/trans_fd.c +++ b/net/9p/trans_fd.c @@ -945,7 +945,7 @@ p9_fd_create_tcp(struct p9_client *client, const char *addr, char *args) if (err < 0) return err; - if (valid_ipaddr4(addr) < 0) + if (addr == NULL || valid_ipaddr4(addr) < 0) return -EINVAL; csocket = NULL; @@ -995,6 +995,9 @@ p9_fd_create_unix(struct p9_client *client, const char *addr, char *args) csocket = NULL; + if (addr == NULL) + return -EINVAL; + if (strlen(addr) >= UNIX_PATH_MAX) { pr_err("%s (%d): address too long: %s\n", __func__, task_pid_nr(current), addr); diff --git a/net/9p/trans_rdma.c b/net/9p/trans_rdma.c index 2649b2ebf961..2ab4574183c9 100644 --- a/net/9p/trans_rdma.c +++ b/net/9p/trans_rdma.c @@ -645,6 +645,9 @@ rdma_create_trans(struct p9_client *client, const char *addr, char *args) struct rdma_conn_param conn_param; struct ib_qp_init_attr qp_attr; + if (addr == NULL) + return -EINVAL; + /* Parse the transport specific mount options */ err = parse_opts(args, &opts); if (err < 0) diff --git a/net/9p/trans_virtio.c b/net/9p/trans_virtio.c index 06dcd3cc6a29..8ca356eb66bb 100644 --- a/net/9p/trans_virtio.c +++ b/net/9p/trans_virtio.c @@ -654,6 +654,9 @@ 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) && diff --git a/net/9p/trans_xen.c b/net/9p/trans_xen.c index 2e2b8bca54f3..c2d54ac76bfd 100644 --- a/net/9p/trans_xen.c +++ b/net/9p/trans_xen.c @@ -94,6 +94,9 @@ static int p9_xen_create(struct p9_client *client, const char *addr, char *args) { struct xen_9pfs_front_priv *priv; + if (addr == NULL) + return -EINVAL; + read_lock(&xen_9pfs_lock); list_for_each_entry(priv, &xen_9pfs_devs, list) { if (!strcmp(priv->tag, addr)) { |