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| author | Tomas Bortoli <tomasbortoli@gmail.com> | 2018-07-27 13:05:58 +0200 |
|---|---|---|
| committer | Dominique Martinet <dominique.martinet@cea.fr> | 2018-08-13 02:34:58 +0200 |
| commit | 10aa14527f458e9867cf3d2cc6b8cb0f6704448b (patch) | |
| tree | 528cd65953fc42890ac1e51ff452d148133a2734 /net/9p/trans_xen.c | |
| parent | fs/9p/xattr.c: catch the error of p9_client_clunk when setting xattr failed (diff) | |
| download | linux-10aa14527f458e9867cf3d2cc6b8cb0f6704448b.tar.xz linux-10aa14527f458e9867cf3d2cc6b8cb0f6704448b.zip | |
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>
Diffstat (limited to 'net/9p/trans_xen.c')
| -rw-r--r-- | net/9p/trans_xen.c | 3 |
1 files changed, 3 insertions, 0 deletions
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)) { |