diff options
| author | Qiujun Huang <hqjagain@gmail.com> | 2020-03-25 15:52:37 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-04-02 19:02:37 +0200 |
| commit | de5908f481f3bf77112a9318828f88aeb5483a9c (patch) | |
| tree | 57cc6346bd015577d3f8722a388322f4730c6fcb /drivers/usb/serial | |
| parent | 2ec350e67e3cf2da529ba214d0d8be8978abbaca (diff) | |
USB: serial: io_edgeport: fix slab-out-of-bounds read in edge_interrupt_callback
commit 57aa9f294b09463492f604feaa5cc719beaace32 upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/serial')
| -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 75c60e74438d..b639d064e5da 100644 --- a/drivers/usb/serial/io_edgeport.c +++ b/drivers/usb/serial/io_edgeport.c @@ -634,7 +634,7 @@ 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) { |