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| author | Jan Beulich <JBeulich@suse.com> | 2012-01-24 13:52:42 +0000 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2012-02-03 16:07:05 -0500 |
| commit | a43a5ccdfa5bd5b2f00aa9b2321df268c2e5d6e2 (patch) | |
| tree | 0269faaf39185a0945ce19fab91b9cfdeb0d05e2 /drivers/xen | |
| parent | e4de866a834620ef974f5ba86d394a13d2f0cf66 (diff) | |
| download | lwn-a43a5ccdfa5bd5b2f00aa9b2321df268c2e5d6e2.tar.gz lwn-a43a5ccdfa5bd5b2f00aa9b2321df268c2e5d6e2.zip | |
xenbus_dev: add missing error check to watch handling
So far only the watch path was checked to be zero terminated, while
the watch token was merely assumed to be.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'drivers/xen')
| -rw-r--r-- | drivers/xen/xenbus/xenbus_dev_frontend.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/xen/xenbus/xenbus_dev_frontend.c b/drivers/xen/xenbus/xenbus_dev_frontend.c index 527dc2a3b89f..89f76252a16f 100644 --- a/drivers/xen/xenbus/xenbus_dev_frontend.c +++ b/drivers/xen/xenbus/xenbus_dev_frontend.c @@ -369,6 +369,10 @@ static int xenbus_write_watch(unsigned msg_type, struct xenbus_file_priv *u) goto out; } token++; + if (memchr(token, 0, u->u.msg.len - (token - path)) == NULL) { + rc = -EILSEQ; + goto out; + } if (msg_type == XS_WATCH) { watch = alloc_watch_adapter(path, token); |