register_blkdev(0, NULL) can result kernel Oops by copying from NULL
in strlcpy(). Fix it by checking NULL pointer at the beginning.
Signed-off-by: Vaughan Cao <vaughan....@oracle.com>
---
block/genhd.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/block/genhd.c b/block/genhd.c
index dadf42b..9564f19 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -287,6 +287,9 @@ int register_blkdev(unsigned int major, const char *name)
struct blk_major_name **n, *p;
int index, ret = 0;
+ if (!name)
+ return -EINVAL;
+
mutex_lock(&block_class_lock);
/* temporary */
--
1.8.3.1
--
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