diff options
| author | Anton Vasilyev <vasilyev@ispras.ru> | 2018-07-27 16:39:31 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-09-19 22:47:13 +0200 |
| commit | 31b9fa898b8ff1ed8378333ce523ba87426a7cf6 (patch) | |
| tree | edd595c586669629898363969e4038e5a8119f9b | |
| parent | 2b6c7457d3e080d2374d083838877a26911d4b1b (diff) | |
tty: rocket: Fix possible buffer overwrite on register_PCI
[ 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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/tty/rocket.c | 2 |
1 files changed, 1 insertions, 1 deletions
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); |