diff options
| author | Johan Hovold <johan@kernel.org> | 2020-01-03 17:35:09 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-04-02 19:02:38 +0200 |
| commit | 3de5ed1a64b96f0a482e2a325bcea38d51a2a1fd (patch) | |
| tree | 84ca67213134cd58b9c456290362be506f514930 /drivers | |
| parent | 75848108adc1fdb1f994143ebe54268df5308a0b (diff) | |
media: ov519: add missing endpoint sanity checks
commit 998912346c0da53a6dbb71fab3a138586b596b30 upstream.
Make sure to check that we have at least one endpoint before accessing
the endpoint array to avoid dereferencing a NULL-pointer on stream
start.
Note that these sanity checks are not redundant as the driver is mixing
looking up altsettings by index and by number, which need not coincide.
Fixes: 1876bb923c98 ("V4L/DVB (12079): gspca_ov519: add support for the ov511 bridge")
Fixes: b282d87332f5 ("V4L/DVB (12080): gspca_ov519: Fix ov518+ with OV7620AE (Trust spacecam 320)")
Cc: stable <stable@vger.kernel.org> # 2.6.31
Cc: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/media/usb/gspca/ov519.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/media/usb/gspca/ov519.c b/drivers/media/usb/gspca/ov519.c index c7aafdbb5738..9a49b50cbb85 100644 --- a/drivers/media/usb/gspca/ov519.c +++ b/drivers/media/usb/gspca/ov519.c @@ -3507,6 +3507,11 @@ static void ov511_mode_init_regs(struct sd *sd) return; } + if (alt->desc.bNumEndpoints < 1) { + sd->gspca_dev.usb_err = -ENODEV; + return; + } + packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize); reg_w(sd, R51x_FIFO_PSIZE, packet_size >> 5); @@ -3632,6 +3637,11 @@ static void ov518_mode_init_regs(struct sd *sd) return; } + if (alt->desc.bNumEndpoints < 1) { + sd->gspca_dev.usb_err = -ENODEV; + return; + } + packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize); ov518_reg_w32(sd, R51x_FIFO_PSIZE, packet_size & ~7, 2); |