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| author | Gustavo A. R. Silva <garsilva@embeddedor.com> | 2017-05-11 10:27:35 -0500 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2017-05-15 17:14:28 -0400 |
| commit | 2d4456c73a487abe53863e10641c2f73537edf5c (patch) | |
| tree | 93b18adce07e85693f4e86c45ff353e6bcd4ab1b /drivers/block/xen-blkback/xenbus.c | |
| parent | 89515d0255c918e08aa4085956c79bf17615fda5 (diff) | |
| download | linux-2d4456c73a487abe53863e10641c2f73537edf5c.tar.gz linux-2d4456c73a487abe53863e10641c2f73537edf5c.tar.bz2 linux-2d4456c73a487abe53863e10641c2f73537edf5c.zip | |
block: xen-blkback: add null check to avoid null pointer dereference
Add null check before calling xen_blkif_put() to avoid potential
null pointer dereference.
Addresses-Coverity-ID: 1350942
Cc: Juergen Gross <jgross@suse.com>
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'drivers/block/xen-blkback/xenbus.c')
| -rw-r--r-- | drivers/block/xen-blkback/xenbus.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/block/xen-blkback/xenbus.c b/drivers/block/xen-blkback/xenbus.c index 8fe61b5dc5a6..1f3dfaa54d87 100644 --- a/drivers/block/xen-blkback/xenbus.c +++ b/drivers/block/xen-blkback/xenbus.c @@ -504,11 +504,13 @@ static int xen_blkbk_remove(struct xenbus_device *dev) dev_set_drvdata(&dev->dev, NULL); - if (be->blkif) + if (be->blkif) { xen_blkif_disconnect(be->blkif); - /* Put the reference we set in xen_blkif_alloc(). */ - xen_blkif_put(be->blkif); + /* Put the reference we set in xen_blkif_alloc(). */ + xen_blkif_put(be->blkif); + } + kfree(be->mode); kfree(be); return 0; |