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Message-Id: <1378809614-17490-1-git-send-email-vaughan.cao@oracle.com> Date: Tue, 10 Sep 2013 18:40:14 +0800 From: Vaughan Cao <vaughan.cao@...cle.com> To: axboe@...nel.dk, linux-kernel@...r.kernel.org Cc: vaughan.cao@...cle.com Subject: [PATCH] block: register_blkdev doesn't check name against NULL 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.cao@...cle.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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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