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| author | Simon Gaiser <simon@invisiblethingslab.com> | 2018-03-15 06:08:03 +0300 |
|---|---|---|
| committer | Boris Ostrovsky <boris.ostrovsky@oracle.com> | 2018-04-17 15:29:08 +0300 |
| commit | ebf04f331fa15a966262341a7dc6b1a0efd633e4 (patch) | |
| tree | 920378e5359706325831631f4df34b945c13c1bb | |
| parent | cd6e992b3aab072cc90839508aaf5573c8f7e066 (diff) | |
| download | linux-ebf04f331fa15a966262341a7dc6b1a0efd633e4.tar.xz | |
xen: xenbus_dev_frontend: Really return response string
xenbus_command_reply() did not actually copy the response string and
leaked stack content instead.
Fixes: 9a6161fe73bd ("xen: return xenstore command failures via response instead of rc")
Signed-off-by: Simon Gaiser <simon@invisiblethingslab.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
| -rw-r--r-- | drivers/xen/xenbus/xenbus_dev_frontend.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/xen/xenbus/xenbus_dev_frontend.c b/drivers/xen/xenbus/xenbus_dev_frontend.c index 0d6d9264d6a9..c3e201025ef0 100644 --- a/drivers/xen/xenbus/xenbus_dev_frontend.c +++ b/drivers/xen/xenbus/xenbus_dev_frontend.c @@ -403,7 +403,7 @@ static int xenbus_command_reply(struct xenbus_file_priv *u, { struct { struct xsd_sockmsg hdr; - const char body[16]; + char body[16]; } msg; int rc; @@ -412,6 +412,7 @@ static int xenbus_command_reply(struct xenbus_file_priv *u, msg.hdr.len = strlen(reply) + 1; if (msg.hdr.len > sizeof(msg.body)) return -E2BIG; + memcpy(&msg.body, reply, msg.hdr.len); mutex_lock(&u->reply_mutex); rc = queue_reply(&u->read_buffers, &msg, sizeof(msg.hdr) + msg.hdr.len); |