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media: dm1105: Limit number of cards to avoid buffer over read

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dm1105_probe() counts number of cards at dm1105_devcount,
but missed bounds check before dereference a card array.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Anton Vasilyev <vasilyev@ispras.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Anton Vasilyev 2018-07-18 10:13:56 -04:00 committed by Mauro Carvalho Chehab
parent 817dc4b579
commit 65b40a986f
1 changed files with 3 additions and 0 deletions
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3
drivers/media/pci/dm1105/dm1105.c
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@ -986,6 +986,9 @@ static int dm1105_probe(struct pci_dev *pdev,
int ret = -ENOMEM;
int i;
if (dm1105_devcount >= ARRAY_SIZE(card))
return -ENODEV;
dev = kzalloc(sizeof(struct dm1105_dev), GFP_KERNEL);
if (!dev)
return -ENOMEM;