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| author | Qiujun Huang <hqjagain@gmail.com> | 2020-03-25 15:52:37 +0800 |
|---|---|---|
| committer | Johan Hovold <johan@kernel.org> | 2020-03-26 10:22:15 +0100 |
| commit | 57aa9f294b09463492f604feaa5cc719beaace32 (patch) | |
| tree | 4cbf781beae88192a47ac1501d54c93879773a42 /drivers/usb/serial/io_edgeport.c | |
| parent | dfee7e2f478346b12ea651d5c28b069f6a4af563 (diff) | |
| download | linux-57aa9f294b09463492f604feaa5cc719beaace32.tar.bz2 | |
USB: serial: io_edgeport: fix slab-out-of-bounds read in edge_interrupt_callback
Fix slab-out-of-bounds read in the interrupt-URB completion handler.
The boundary condition should be (length - 1) as we access
data[position + 1].
Reported-and-tested-by: syzbot+37ba33391ad5f3935bbd@syzkaller.appspotmail.com
Signed-off-by: Qiujun Huang <hqjagain@gmail.com>
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
Diffstat (limited to 'drivers/usb/serial/io_edgeport.c')
| -rw-r--r-- | drivers/usb/serial/io_edgeport.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/usb/serial/io_edgeport.c b/drivers/usb/serial/io_edgeport.c index 5737add6a2a4..4cca0b836f43 100644 --- a/drivers/usb/serial/io_edgeport.c +++ b/drivers/usb/serial/io_edgeport.c @@ -710,7 +710,7 @@ static void edge_interrupt_callback(struct urb *urb) /* grab the txcredits for the ports if available */ position = 2; portNumber = 0; - while ((position < length) && + while ((position < length - 1) && (portNumber < edge_serial->serial->num_ports)) { txCredits = data[position] | (data[position+1] << 8); if (txCredits) { |