From: Goldwyn Rodrigues <rgoldwyn-l3A5Bk7waGM@public.gmane.org>
To: linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Cc: roland-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org
Subject: mthca - check for NULL mode in uverbs_devnode()
Date: Sat, 2 Jul 2011 12:45:45 -0500 [thread overview]
Message-ID: <20110702174542.GA7417@baloo.cartoons> (raw)
Unloading ib_mthca crashes with a NULL pointer dereference because
devtmpfs_delete_node() calls device_get_devnode() with mode as NULL.
Signed-off-by: Goldwyn Rodrigues <rgoldwyn-l3A5Bk7waGM@public.gmane.org>
---
diff --git a/drivers/infiniband/core/uverbs_main.c b/drivers/infiniband/core/uverbs_main.c
index e49a85f..56898b6 100644
--- a/drivers/infiniband/core/uverbs_main.c
+++ b/drivers/infiniband/core/uverbs_main.c
@@ -826,7 +826,8 @@ static void ib_uverbs_remove_one(struct ib_device *device)
static char *uverbs_devnode(struct device *dev, mode_t *mode)
{
- *mode = 0666;
+ if (mode)
+ *mode = 0666;
return kasprintf(GFP_KERNEL, "infiniband/%s", dev_name(dev));
}
--
Goldwyn
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reply other threads:[~2011-07-02 17:45 UTC|newest]
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