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| author | Qiujun Huang <hqjagain@gmail.com> | 2020-03-25 10:52:37 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-04-02 17:34:34 +0300 |
| commit | e68fb968fdd1d6f8c8558907edf1ce0b33a8108c (patch) | |
| tree | 0846ec277df9a38ba3863a691ba5c25edba5e228 /drivers/usb/serial/io_edgeport.c | |
| parent | 57194c6fd8c478f468f1aa7ae2175ea77c4d8de1 (diff) | |
| download | linux-e68fb968fdd1d6f8c8558907edf1ce0b33a8108c.tar.xz | |
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/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 3705b64ab948..45d5e5c899e1 100644 --- a/drivers/usb/serial/io_edgeport.c +++ b/drivers/usb/serial/io_edgeport.c @@ -714,7 +714,7 @@ 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) { |