This is a note to let you know that I've just added the patch titled

USB: serial: io_edgeport: fix slab-out-of-bounds read in

to my usb git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git in the usb-next branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will also be merged in the next major kernel release during the merge window.

If you have any questions about this process, please let me know.

From 57aa9f294b09463492f604feaa5cc719beaace32 Mon Sep 17 00:00:00 2001

From: Qiujun Huang hqjagain@gmail.com Date: Wed, 25 Mar 2020 15:52:37 +0800 Subject: 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 --- drivers/usb/serial/io_edgeport.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

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) {