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| author |   Dan Carpenter <dan.carpenter@oracle.com> | 2017-12-05 17:38:43 +0300 |
|---|---|---|
| committer |   Boris Ostrovsky <boris.ostrovsky@oracle.com> | 2017-12-06 09:44:43 -0500 |
| commit | 8c71fa88f7778eb093ee22cba13a3813a82113ad (patch) | |
| tree | 4a5396a6028cbb51a5caf2397f61f6853a30f5da /drivers/xen | |
| parent | xen/pvcalls: fix potential endless loop in pvcalls-front.c (diff) | |
| download | linux-dev-8c71fa88f7778eb093ee22cba13a3813a82113ad.tar.xz linux-dev-8c71fa88f7778eb093ee22cba13a3813a82113ad.zip | |
xen/pvcalls: check for xenbus_read() errors
Smatch complains that "len" is uninitialized if xenbus_read() fails so
let's add some error handling.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Diffstat (limited to 'drivers/xen')
| -rw-r--r-- | drivers/xen/pvcalls-front.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/xen/pvcalls-front.c b/drivers/xen/pvcalls-front.c index 40caa92bff33..afa3f1b5d807 100644 --- a/drivers/xen/pvcalls-front.c +++ b/drivers/xen/pvcalls-front.c @@ -1128,6 +1128,8 @@ static int pvcalls_front_probe(struct xenbus_device *dev, } versions = xenbus_read(XBT_NIL, dev->otherend, "versions", &len); + if (IS_ERR(versions)) + return PTR_ERR(versions); if (!len) return -EINVAL; if (strcmp(versions, "1")) { |