From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dan Carpenter Date: Fri, 26 Oct 2012 06:59:09 +0000 Subject: [patch] drm: potential NULL dereference with debugging enabled Message-Id: <20121026065908.GA9284@elgon.mountain> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: David Airlie Cc: kernel-janitors@vger.kernel.org, dri-devel@lists.freedesktop.org We check whether this pointer is NULL a few lines later in the function so probably we should check here too. Signed-off-by: Dan Carpenter --- This is a static checker fix. diff --git a/drivers/gpu/drm/drm_lock.c b/drivers/gpu/drm/drm_lock.c index d752c96..036253e 100644 --- a/drivers/gpu/drm/drm_lock.c +++ b/drivers/gpu/drm/drm_lock.c @@ -68,7 +68,8 @@ int drm_lock(struct drm_device *dev, void *data, struct drm_file *file_priv) DRM_DEBUG("%d (pid %d) requests lock (0x%08x), flags = 0x%08x\n", lock->context, task_pid_nr(current), - master->lock.hw_lock->lock, lock->flags); + master->lock.hw_lock ? master->lock.hw_lock->lock : -1, + lock->flags); add_wait_queue(&master->lock.lock_queue, &entry); spin_lock_bh(&master->lock.spinlock);