Messages in this thread Patch in this message | | | From | Sasha Levin <> | Subject | [PATCH AUTOSEL 4.9 12/62] tty: rocket: Fix possible buffer overwrite on register_PCI | Date | Sun, 2 Sep 2018 13:14:16 +0000 |
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From: Anton Vasilyev <vasilyev@ispras.ru>
[ Upstream commit 0419056ec8fd01ddf5460d2dba0491aad22657dd ]
If number of isa and pci boards exceed NUM_BOARDS on the path rp_init()->init_PCI()->register_PCI() then buffer overwrite occurs in register_PCI() on assign rcktpt_io_addr[i].
The patch adds check on upper bound for index of registered board in register_PCI.
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Anton Vasilyev <vasilyev@ispras.ru> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> --- drivers/tty/rocket.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/tty/rocket.c b/drivers/tty/rocket.c index b0cc47c77b40..e8e8973939d3 100644 --- a/drivers/tty/rocket.c +++ b/drivers/tty/rocket.c @@ -1913,7 +1913,7 @@ static __init int register_PCI(int i, struct pci_dev *dev) ByteIO_t UPCIRingInd = 0; if (!dev || !pci_match_id(rocket_pci_ids, dev) || - pci_enable_device(dev)) + pci_enable_device(dev) || i >= NUM_BOARDS) return 0; rcktpt_io_addr[i] = pci_resource_start(dev, 0); -- 2.17.1
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